Compare supplement forms side-by-side
When you've decided you want a supplement, the next question is usually which form. These guides walk through the most-bought decisions head-to-head: how the forms differ on absorption, evidence base, side-effect profile, and best-fit goal. No sponsorships, no affiliate links.
Featured multi-form guides
Magnesium glycinate vs citrate vs L-threonate
Three of the most-bought magnesium forms compared on absorption, GI tolerance, evidence base, and best-fit goal — sleep, constipation, or cognition.
Whey vs casein vs pea protein
Amino-acid completeness, absorption rate, MPS evidence, and digestive tolerance — and what the form difference actually buys you.
5-HTP vs L-tryptophan vs SAMe
Three serotonin-pathway supplements compared. Mechanism, dose, and the drug-interaction profile that decides which (if any) is right for you.
Ashwagandha vs Rhodiola vs Cordyceps
Stress, energy, performance — three of the most-studied adaptogens compared on evidence, time-to-effect, and side-effect profile.
EPA vs DHA vs ALA omega-3
The three omega-3s compared on cardiovascular, cognitive, and inflammatory endpoints — plus the high-dose AFib paradox to know about.
Monohydrate vs HCl vs ethyl ester vs buffered
Four creatine forms compared on muscle saturation, training outcomes, GI tolerance, cost, and what 30+ years of head-to-head trials actually show.
Standard vs Meriva vs Theracurmin vs liposomal vs piperine
Six bioavailable curcumin formulations compared on pharmacokinetics, clinical trial outcomes, and which one fits which indication.
Which probiotic strain for which condition
The strain-specificity problem, decoded. LGG, S. boulardii, B. infantis 35624, L. reuteri DSM 17938 — which RCT data fits which use-case.
Zinc picolinate vs gluconate vs bisglycinate vs carnosine
Four zinc forms compared on absorption, GI tolerance, cold-duration trials, gastric mucosa evidence, and who actually benefits from each.
BCAA vs EAA vs whey — leucine threshold
Three protein-related products compared on muscle protein synthesis, the leucine threshold, real-world muscle outcomes, and cost.
Lion's Mane vs alpha-GPC vs citicoline vs bacopa
Four cognition supplements compared on mechanism, trial endpoints, latency-to-effect, dose, side effects, and cost.
Berberine vs ALA vs chromium vs banaba
Four metformin-adjacent supplements ranked on HbA1c, fasting glucose, neuropathy, and safety. What each actually does — and what it doesn't.
Tongkat ali vs fadogia vs forskolin vs ashwagandha
The four podcast-popular T supplements ranked by actual human-trial evidence. One has multiple RCTs; one has none in humans.
Curcumin vs boswellia vs MSM vs collagen
Four non-NSAID joint supplements compared on osteoarthritis pain, function, time-to-effect, mechanism, and safety.
Recently added comparisons
Apigenin vs Magnesium for sleep — what the human evidence actually says
Apigenin (the chamomile flavonoid) vs Magnesium for sleep — comparing a podcast-popular bedtime molecule against the better-established mineral on actual human trial outcomes.
Ashwagandha vs Rhodiola — which adaptogen actually fits your problem?
Ashwagandha vs Rhodiola compared on evidence base, mechanism, dose, and what each is actually good for. Two adaptogens that solve different problems.
Berberine vs Cinnamon — which one actually moves blood sugar?
Berberine vs cinnamon for glucose control. One has metformin-comparable trial data; the other has small effects in some preparations. Compared head-to-head on dose, evidence, and safety.
Beta-Alanine vs Citrulline — which performance supplement matches your training?
Beta-alanine vs citrulline malate — which performance ergogenic actually matches the demands of your training? Compared on duration window, mechanism, and dose.
L-Citrulline vs L-Arginine — which one actually raises nitric oxide
L-Citrulline vs L-Arginine for nitric oxide, blood flow, and pumps. The first-pass metabolism story explains why citrulline outperforms arginine for almost every endpoint.
CoQ10 vs PQQ — does the trendy mitochondrial supplement actually work?
CoQ10 vs PQQ compared on evidence base, mechanism, dose, and cost. One has 40 years of clinical data. The other is mostly hype — for now.
Creatine vs BCAAs — which actually builds muscle?
Creatine monohydrate vs BCAAs compared on muscle growth, recovery, evidence base, cost, and safety. One has 500+ trials behind it. The other doesn't.
Glucosamine vs MSM — which joint supplement actually helps?
Glucosamine vs MSM for knee osteoarthritis pain. Compared on trial evidence, dose, sulfate vs hydrochloride forms, and where the actual symptomatic benefit lives.
Inositol vs Berberine for PCOS — which one fits which presentation?
Inositol vs Berberine for PCOS — both have metformin-comparable trial data, but for different PCOS phenotypes. Compared on dose, safety, and which presentation each one fits.
Ferrous bisglycinate vs ferrous sulfate — which iron, when, and why
Ferrous bisglycinate vs ferrous sulfate — chelated 'gentle iron' vs the standard salt. What the comparative trials show on absorption, GI side effects, and hemoglobin recovery.
Vitamin K2: MK-4 vs MK-7 — what's actually different
MK-4 vs MK-7 — the two main menaquinone forms of vitamin K2 compared on half-life, dose, evidence base, and which one belongs in your bone-health stack.
L-Theanine vs Magnesium for sleep — which one fits which problem?
L-Theanine vs Magnesium for sleep compared on evidence base, mechanism, dose, and which sleep complaint each one is actually for.
Lion's Mane vs Bacopa — which nootropic actually has the trial weight?
Lion's mane mushroom vs Bacopa monnieri compared on cognitive trial evidence, mechanism, dose, and onset window. Two popular nootropics with different evidence profiles.
Lutein vs Astaxanthin — which carotenoid does what
Lutein vs Astaxanthin — both are carotenoids, both are antioxidants, both are sold for eye and skin health. The trial evidence actually points different directions.
Melatonin vs magnesium glycinate — which is better for sleep?
Melatonin vs magnesium glycinate compared on what they actually fix in sleep — onset latency, fragmentation, anxiety-driven insomnia. Different problems; different tools.
NAC vs glutathione — supplement the precursor or the molecule itself?
NAC (N-acetyl cysteine) vs liposomal glutathione compared on bioavailability, evidence base, dose, cost, and safety. The cheaper precursor wins on most counts.
NMN vs NR — the NAD+ precursors compared honestly
NMN vs NR — the two trendy NAD+ precursors compared on what actually moves NAD+ in humans, what trial endpoints have shown, and whether the longevity hype is supported.
Quercetin vs Bromelain — which one fits which inflammatory complaint?
Quercetin vs Bromelain — two natural anti-inflammatories often sold together. Compared on what each is actually for, and where the evidence is real vs marketing.
Spermidine vs Resveratrol — two longevity bets that haven't paid off
Spermidine vs Resveratrol for longevity — two compounds with strong preclinical mechanism stories and underwhelming human trial data. Compared on what the evidence actually shows.
Tongkat Ali vs Fadogia Agrestis — what does the human evidence actually look like?
Tongkat ali vs Fadogia agrestis compared on actual human evidence (one has a little, the other has essentially none) and what the testosterone-boosting marketing actually rests on.
CoQ10: ubiquinone vs ubiquinol — does the form matter?
Ubiquinone vs ubiquinol — the oxidised vs reduced forms of CoQ10. Where the bioavailability gap matters, where it doesn't, and what dose actually moves trial endpoints.
Vitamin D3 vs D2 — which form should you actually buy?
Vitamin D3 (cholecalciferol) vs D2 (ergocalciferol) compared on absorption, half-life, evidence base, and when each is appropriate.
Whey vs Casein protein — which one, when, and why
Whey vs Casein — fast vs slow protein, leucine content, when each wins, and whether the bedtime casein hype holds up. Honest comparison with trial data.
Ashwagandha vs L-Theanine for stress — chronic vs acute, with caveats
Ashwagandha vs L-theanine — different time windows, different mechanisms, different safety profiles. The chronic-stress adaptogen vs the acute-stress amino acid.
Collagen vs Vitamin C for skin — different mechanisms, often combined
Collagen peptides vs vitamin C for skin elasticity and aging — they work through different mechanisms and may be better stacked than chosen between. What the trials show.
Curcumin vs Boswellia — anti-inflammatory botanicals compared
Curcumin vs Boswellia — both are anti-inflammatory botanicals with osteoarthritis and joint-pain trial data. Compared on absorption, mechanism, and combination evidence.
Fish Oil vs Algal Oil — bioequivalence, contaminants, and what the trials show
Fish oil vs algal oil — compared on EPA/DHA content, bioequivalence, contaminants, sustainability, and clinical outcomes. The right choice depends on your priorities.
Glycine vs L-Theanine — calm without sedation, with different mechanisms
Glycine vs L-theanine — both produce calm without sedation but work through different mechanisms. Compared on sleep, focus, anxiety, and stacking with caffeine.
Lutein vs Zeaxanthin — the two macular pigment carotenoids
Lutein vs zeaxanthin — the two carotenoids that make up macular pigment, compared on the AREDS2 dataset and what they actually do separately and together.
Magnesium Glycinate vs Threonate — sleep, cognition, and the premium question
Magnesium glycinate vs threonate — what each form is actually best at, what the brain-cognition trials show for threonate, and whether the premium is worth it.
Saw Palmetto vs Beta-Sitosterol — BPH evidence, head-to-head
Saw palmetto vs beta-sitosterol for BPH symptoms — three Cochrane reviews vs the lesser-known phytosterol with the better LUTS trial data. Which one actually works?
Whey vs Plant Protein — leucine, MPS, and what the head-to-head trials show
Whey vs plant protein — compared on leucine content, muscle protein synthesis, satiety, digestibility, and long-term lean-mass outcomes. What the head-to-head trials show.
Zinc Picolinate vs Zinc Citrate — absorption and practical fit
Zinc picolinate vs zinc citrate — the two forms most commonly compared on absorption studies. Which is actually better, and how much does the difference matter?
Alpha-Lipoic Acid vs Acetyl-L-Carnitine — two mitochondrial cofactors compared
Alpha-lipoic acid (ALA) vs Acetyl-L-Carnitine (ALCAR) for diabetic neuropathy, fatigue, and mitochondrial support — trial evidence, mechanisms, and stacking.
Citicoline vs Alpha-GPC — two cholinergic compounds compared
Citicoline (CDP-choline) vs Alpha-GPC — two cholinergic supplements compared on cognition, stroke recovery, dementia, and cardiovascular signal.
Elderberry vs Zinc for colds — duration reduction with caveats
Elderberry vs zinc for common cold duration — RCT evidence, timing, lozenge form, and what the AAFP and Cochrane reviews say.
Hibiscus vs Pomegranate for blood pressure — two polyphenol-rich plants
Hibiscus tea vs pomegranate extract for blood pressure — comparing meta-analyses, mechanism, and what each does beyond BP.
Magnesium Citrate vs Magnesium Oxide — absorption, bowel effect, cost
Magnesium citrate vs magnesium oxide — bioavailability, constipation effect, dose-per-pill, and when each is the right choice.
Riboflavin vs CoQ10 for migraine prevention — two mitochondrial cofactors
Riboflavin (vitamin B2) vs CoQ10 for migraine prevention — comparing the AAN/AHS-graded evidence, cost, and stacking.
Saffron vs 5-HTP for mood — the RCT-backed extract vs the precursor
Saffron vs 5-HTP for mild-to-moderate depression and low mood — comparing trial evidence, mechanism, safety, and serotonin syndrome risk.
TMG vs SAMe — methyl donor vs activated methyl carrier
TMG (betaine) vs SAMe — different roles in the methylation cycle, different evidence bases for homocysteine, depression, and liver disease.
Tyrosine vs Rhodiola for fatigue — acute precursor vs chronic adaptogen
L-tyrosine vs Rhodiola rosea for fatigue, mental performance under stress, and burnout — what each one actually does and when each works.
Astaxanthin vs Krill oil — antioxidant vs phospholipid omega-3, compared
Astaxanthin vs krill oil — both come from the same red marine pigment world but answer different questions. Astaxanthin is a carotenoid antioxidant; krill oil is phospholipid-bound EPA/DHA with a s…
D-Mannose vs Cranberry for UTI prevention — which actually works?
D-mannose vs cranberry for recurrent UTI prevention — compared on RCT evidence, dosing, the proanthocyanidin (PAC) standard, and which one to actually pick.
EPA vs DHA — when each omega-3 actually outperforms the other
EPA vs DHA — compared on depression, triglycerides, cognitive aging, pregnancy DHA, and where the ratio actually matters.
Hawthorn vs Aged Garlic for blood pressure — herbal cardio compared
Hawthorn berry vs aged garlic extract for mildly elevated blood pressure — compared on RCT evidence, drug interactions, dose, and what each actually does to systolic.
Holy basil (Tulsi) vs Ashwagandha — adaptogens for stress, compared
Holy basil (Tulsi) vs ashwagandha — two Ayurvedic adaptogens compared on stress, cortisol, sleep, and the thyroid risk that pushes some people toward holy basil.
Maca vs Ashwagandha — libido, stress, and hormones compared
Maca vs ashwagandha — compared on libido, stress, sleep, testosterone, and the thyroid caveat that matters for ashwagandha.
Magnesium vs Calcium for bone health — which one actually matters more
Magnesium vs calcium for bone health — which mineral matters more for fracture prevention, why calcium-alone trials disappointed, and how to think about the K2/D3/protein context.
Methylcobalamin vs Cyanocobalamin — which B12 form is actually better?
Methylcobalamin vs cyanocobalamin — compared on bioavailability, retention, neurological indications, smoking and renal status, and where the methyl-form argument actually pays off.
Methylfolate vs Folic Acid — the MTHFR question, compared honestly
Methylfolate (L-5-MTHF) vs synthetic folic acid — compared on neural-tube prevention, depression adjunctive use, MTHFR variants, and where the
Reishi vs Cordyceps — functional mushrooms, compared honestly
Reishi vs cordyceps — compared on the trial evidence for stress/sleep (reishi) and exercise performance (cordyceps), plus the mycelium-on-grain extraction issue.
Selenium vs Iodine for thyroid — when each helps and when iodine harms
Selenium vs iodine for thyroid — both are essential, but iodine excess can flip euthyroid people into hypothyroidism or trigger Hashimoto
Spirulina vs Chlorella — algae compared honestly
Spirulina vs chlorella — compared on protein content, blood pressure, lipids, heavy metals, contamination risk, and whether either deserves the
TUDCA vs NAC for liver — bile acids, antioxidants, and what each actually does
TUDCA vs NAC for liver health — bile-acid chaperone vs glutathione precursor. What each actually does in cholestasis, NAFLD, and acetaminophen toxicity, and how to think about combining them.
Valerian vs Hops for sleep — herbal sedatives, compared
Valerian vs hops for insomnia — compared on subjective vs objective sleep endpoints, the combined product evidence, dose, and the case for either as a single-ingredient bet.
Curcumin vs Ginger for inflammation — what each does in pain, OA, and metabolic markers
Curcumin vs ginger for inflammation — both are kitchen rhizomes with real anti-inflammatory data. Curcumin has the larger OA trial base; ginger has separate strengths.
Phosphatidylserine vs Bacopa monnieri — membrane lipid vs Ayurvedic nootropic
Phosphatidylserine vs Bacopa monnieri — two memory-and-focus supplements with different mechanisms, different timelines, and different evidence bases.
Probiotics vs Prebiotics — live bacteria vs the fibre that feeds them
Probiotics vs prebiotics — live bacteria vs the fibre that feeds your existing microbiota. When each helps, when each makes IBS worse, and how the synbiotic combinations actually work.
Beetroot vs Citrulline for pumps and performance — two routes to nitric oxide compared
Beetroot (dietary nitrate) vs L-citrulline for training pumps and performance — two routes to nitric oxide compared on dose, ergogenic effect, and side effects.
Black Cohosh vs Red Clover for menopause — what the head-to-head evidence actually shows
Black Cohosh vs Red Clover for menopausal hot flashes — what the head-to-head trials and Cochrane reviews show, dose, safety, and where each fits.
Carnitine vs CoQ10 for energy — two mitochondrial supplements compared
L-Carnitine vs CoQ10 for energy and fatigue — both target mitochondrial bioenergetics. Compared on populations, dose, and where each actually has trial evidence.
Ginkgo vs Bacopa for memory — which actually has trial evidence in adults
Ginkgo vs Bacopa for memory — both are heavily marketed, but they sit at very different evidence and speed-of-effect profiles. Compared on memory, attention, mood, and side effects.
Magnesium vs Zinc for sleep — what the trial evidence supports
Magnesium vs Zinc for sleep — the head-to-head most consumers haven't asked. Compared on trial evidence, dose, form, and where each actually helps with sleep.
Olive Leaf vs Garlic for blood pressure — what the trial evidence actually shows
Olive leaf vs garlic for blood pressure — both have RCT evidence at therapeutic doses. Compared on effect size, lipid effects, and tolerability.
Saw Palmetto vs Pygeum for BPH — what the prostate trials actually show
Saw palmetto vs pygeum for benign prostatic hyperplasia — what the meta-analyses really show on symptom scores, dose, and where each actually fits.
Spirulina vs Moringa — two "superfood" green powders compared honestly
Spirulina vs Moringa — two heavily marketed 'superfood' powders compared on real trial evidence, nutritional content, contamination risks, and where they actually deliver.
L-Theanine vs Lemon Balm for anxiety — daytime calm compared
L-theanine vs Lemon balm (Melissa officinalis) for anxiety — two non-sedating calming options compared on trial evidence, dose, and stacking.
Acetyl-L-carnitine vs phosphatidylserine for cognition
ALCAR vs phosphatidylserine compared on memory, attention, age-associated decline, mood, evidence, dosing, and cost. Two cognition supplements with overlapping but distinct best uses.
American ginseng vs rhodiola for fatigue
Panax quinquefolius (American ginseng) vs Rhodiola rosea compared on fatigue, cognition, immunity, evidence, dose, and cost. Two adaptogens, different mechanisms.
Boswellia vs MSM for Joint Pain — what each is actually for
Boswellia serrata vs MSM for osteoarthritis pain — effect size, time-to-effect, and which to try first.
Cordyceps vs Rhodiola for Endurance — VO2max vs perceived exertion
Cordyceps militaris vs Rhodiola rosea for endurance — VO2max, perceived exertion, time-to-exhaustion, and where each fits in an endurance stack.
L-Carnitine vs Acetyl-L-Carnitine — same molecule, different jobs
L-Carnitine vs Acetyl-L-Carnitine — same backbone, very different evidence. Cardiac, fertility, and metabolism vs cognition and neuropathy.
Lactoferrin vs D-Mannose for UTI Prevention — different mechanisms, different roles
Lactoferrin vs D-Mannose for recurrent UTI — anti-adhesion sugar vs iron-modulating glycoprotein. Different mechanisms, different evidence weights.
Lemon balm vs passionflower for anxiety
Lemon balm vs passionflower compared on situational anxiety, sleep onset, evidence base, dose, and safety. Two gentle botanicals with overlapping but distinct profiles.
Magnesium L-threonate vs citicoline — which actually helps cognition?
Magnesium L-threonate vs citicoline compared on cognition, memory, attention, evidence base, dosing, and cost. Two of the highest-claim nootropics, head-to-head.
Magnesium taurate vs magnesium glycinate
Magnesium taurate vs magnesium glycinate compared on blood pressure, sleep, anxiety, bioavailability, and price. Two well-absorbed organic chelates with different best uses.
Milk Thistle vs TUDCA — two very different liver supplements
Milk thistle vs TUDCA — flavolignan antioxidant vs bile-acid chaperone. Two very different liver supplements compared by indication and evidence.
Niacin vs Red Yeast Rice for Cholesterol — and why neither replaces a statin
Niacin vs Red Yeast Rice for cholesterol — what each does, what the evidence shows, and the safety story behind both.
P5P (Vitamin B6) vs Magnesium for PMS — which symptoms each fits
Vitamin B6 (P5P) vs Magnesium for PMS — which symptoms each helps, dose, and why the combination outperforms either alone.
Peppermint Oil vs Ginger for IBS — pain vs nausea, not interchangeable
Enteric-coated peppermint oil vs ginger for IBS — pain/spasm vs nausea/bloating, dose, and where each fits.
Pine bark (Pycnogenol) vs grape seed extract
Pycnogenol vs grape seed extract compared on circulation, blood pressure, skin, evidence base, dosing, and cost. Two OPC-rich polyphenols with surprisingly different trial records.
Pomegranate vs beetroot for blood pressure
Pomegranate vs beetroot compared on systolic and diastolic blood pressure, mechanism, dose, and cost. Two food-derived BP supplements with strong but different evidence bases.
Saw Palmetto vs Stinging Nettle Root for BPH — separate or combined?
Saw palmetto vs stinging nettle root for BPH — what each does, what trial weight each has, and why the combination is the most-studied formulation.
Schisandra vs ashwagandha for stress
Schisandra chinensis vs ashwagandha compared on stress, cortisol, fatigue, evidence, dose, and cost. Two adaptogens with very different trial bases.
Sulforaphane vs NAC for "detox" — what each actually does
Sulforaphane vs NAC compared on glutathione, Nrf2, liver, evidence base, dose, and where each one is actually the right pick. Two glutathione-pathway supplements, head-to-head.
Taurine vs Magnesium for Blood Pressure — which lowers it more?
Taurine vs Magnesium for blood pressure — head-to-head on trial-level effect size, who responds, and where each fits in a hypertension stack.
Beta-carotene vs Vitamin A (retinol) — which one is safe, and for whom?
Beta-carotene vs preformed Vitamin A (retinol) — the safety, conversion, lung-cancer signals, pregnancy nuance, and which one is the smarter default.
Bilberry vs Lutein for eye health — which one for which complaint?
Bilberry vs Lutein for eye health — which one for digital eye strain, macular pigment, night vision, or AMD prevention. The honest split.
Boron vs Zinc for testosterone — which mineral has real evidence (and in whom)?
Boron vs Zinc for testosterone — the honest split on what each mineral actually does, who has the deficiency that matters, and where the marketing oversells.
Bromelain vs Serrapeptase for inflammation — which proteolytic enzyme has real evidence?
Bromelain vs Serrapeptase — both sold as
CBD vs Magnesium for sleep — which one for which kind of bad sleep?
CBD vs Magnesium glycinate for sleep — the head-to-head on evidence, dose, drug interactions, and which one fits which sleep complaint.
Creatine HCl vs Creatine Monohydrate — does the pricier form actually do anything?
Creatine HCl vs Creatine Monohydrate — the head-to-head on absorption claims, GI tolerance, dose, evidence base, and price. The honest answer on which one to buy.
DHEA vs Pregnenolone — which hormone precursor (if any) actually has evidence?
DHEA vs Pregnenolone — both are sold as
Ginkgo vs Vinpocetine for cognition — circulation-focused nootropics compared
Ginkgo biloba vs Vinpocetine for cognition — which has real trials, which is hype, regulatory status, and where each one (if at all) belongs.
Creatine vs Beta-Alanine — same shelf, very different jobs
Creatine vs beta-alanine compared on what they actually do, which sport profiles benefit, dosing, stacking logic, and what the meta-analyses show.
Vitamin C vs Zinc for colds — what the trials actually show
Vitamin C vs zinc for the common cold compared on trial evidence, prevention vs duration, dose, form, and safety. What the Cochrane reviews actually conclude.
More comparison guides coming. Have a request? Open a request via the about page contact and we'll add it to the queue.
Full A–Z index of all comparisons (for quick lookup & crawlers)
Compare supplements
Side-by-side comparisons of supplement forms, brands, and protocols.
- Acetyl-L-carnitine vs phosphatidylserine for cognition
- Ashwagandha vs Rhodiola vs Cordyceps — three adaptogens compared
- Alpha-Lipoic Acid vs Acetyl-L-Carnitine — diabetic neuropathy and mitochondrial support compared
- American ginseng vs rhodiola for fatigue
- Apigenin vs Glycine for sleep — which one for which sleep problem?
- Apigenin vs Magnesium for sleep — what the human evidence actually says
- Ashwagandha vs L-Theanine for stress — chronic stress vs acute stress, and the thyroid caveat
- Ashwagandha vs Rhodiola — which adaptogen actually fits your problem?
- Astaxanthin vs Krill oil — antioxidant vs phospholipid omega-3 compared
- BCAA vs EAA vs whey — what the leucine-threshold trials actually show
- Beetroot vs Citrulline for pumps and performance — two routes to nitric oxide compared
- Berberine vs Cinnamon — which one actually moves blood sugar?
- Beta-Alanine vs Citrulline — which performance supplement matches your training?
- Beta-carotene vs Vitamin A (retinol) — which one is safe, and for whom?
- Bilberry vs Lutein for eye health — which one for which complaint?
- Black Cohosh vs Red Clover for menopause — what the head-to-head evidence actually shows
- Boron vs Magnesium for bone health — what each actually does in the bone matrix
- Boron vs Zinc for testosterone — which mineral has real evidence (and in whom)?
- Boswellia vs MSM for Joint Pain — what each is actually for
- Bovine vs Marine Collagen — type I/III mix vs marine type I, and what the difference means
- Bromelain vs Serrapeptase for inflammation — which proteolytic enzyme has real evidence?
- Carnitine vs CoQ10 for energy — two mitochondrial supplements compared
- CBD vs Magnesium for sleep — which one for which kind of bad sleep?
- Citicoline vs Alpha-GPC — two cholinergic compounds compared
- L-Citrulline vs L-Arginine — which one actually raises nitric oxide
- Collagen vs Vitamin C for skin — which actually helps the dermis you have?
- CoQ10 vs Magnesium for migraine prophylaxis — which one (or both)?
- CoQ10 vs PQQ — does the trendy mitochondrial supplement actually work?
- Cordyceps vs Rhodiola for Endurance — VO2max vs perceived exertion
- Creatine forms: monohydrate vs HCl vs ethyl ester vs buffered — what 30 years of trials actually show
- Creatine HCl vs Creatine Monohydrate — does the pricier form actually do anything?
- Creatine vs BCAAs — which actually builds muscle?
- Curcumin formulations compared: standard vs Meriva vs Theracurmin vs liposomal vs piperine — bioavailability ranked
- Curcumin vs Boswellia — two anti-inflammatory botanicals compared on osteoarthritis and beyond
- Curcumin vs Ginger for inflammation — what each does in pain, OA, and metabolic markers
- D-Mannose vs Cranberry for UTI prevention — which actually works?
- DHEA vs Pregnenolone — which hormone precursor (if any) actually has evidence?
- DIM vs Calcium D-Glucarate — two oestrogen-metabolism supplements compared
- Elderberry vs Zinc for colds — duration reduction, timing, lozenge form
- EPA vs DHA — when each omega-3 outperforms the other
- Fish Oil vs Algal Oil — EPA/DHA bioequivalence, sustainability, and what the trials show
- Ginger vs Peppermint oil for nausea — which one for which trigger?
- Ginkgo vs Bacopa for memory — which actually has trial evidence in adults
- Ginkgo vs Vinpocetine for cognition — circulation-focused nootropics compared
- Glucosamine vs MSM — which joint supplement actually helps?
- Glycine vs L-Theanine — calm without sedation, compared on what each actually does
- Hawthorn vs Aged Garlic for blood pressure — herbal cardio compared
- Hibiscus vs Pomegranate for blood pressure — two polyphenol-rich plants compared
- Holy basil (Tulsi) vs Ashwagandha — adaptogens for stress compared
- Inositol vs Berberine for PCOS — which one fits which presentation?
- Ferrous bisglycinate vs ferrous sulfate — which iron, when, and why
- Vitamin K2: MK-4 vs MK-7 — what's actually different
- L-Carnitine vs Acetyl-L-Carnitine — same molecule, different jobs
- L-Glutamine vs Zinc Carnosine for gut healing — what each actually does to the intestinal lining
- L-Theanine vs Magnesium for sleep — which one fits which problem?
- Lactoferrin vs D-Mannose for UTI Prevention — different mechanisms, different roles
- Lemon balm vs passionflower for anxiety
- Lion's Mane vs Bacopa — which nootropic actually has the trial weight?
- Lutein vs Astaxanthin — which carotenoid does what
- Lutein vs Zeaxanthin — macular pigment, AMD risk, and why both belong in the same conversation
- Maca vs Ashwagandha — libido, stress, and hormones compared
- Maca vs Tongkat Ali for libido — non-hormonal vs hormonal mechanism, which fits you?
- Magnesium Citrate vs Magnesium Oxide — absorption, constipation, cost
- Magnesium glycinate vs citrate vs L-threonate — which form is right for you?
- Magnesium glycinate vs Ashwagandha for stress — which one for which problem?
- Magnesium Glycinate vs Threonate — sleep vs cognition, and what the price difference actually buys
- Magnesium L-threonate vs citicoline — which actually helps cognition?
- Magnesium Malate vs Glycinate — energy, sleep, and the right form for the right goal
- Magnesium taurate vs magnesium glycinate
- Magnesium vs Calcium for bone health — which one actually matters more
- Magnesium vs Zinc for sleep — what the trial evidence supports
- Melatonin vs magnesium glycinate — which is better for sleep?
- Methylcobalamin vs Cyanocobalamin — which B12 form is actually better?
- Methylfolate vs Folic Acid — the MTHFR question, compared honestly
- Milk Thistle vs TUDCA — two very different liver supplements
- NAC vs glutathione — supplement the precursor or the molecule itself?
- Niacin vs Red Yeast Rice for Cholesterol — and why neither replaces a statin
- NMN vs NR — the NAD+ precursors compared honestly
- NMN vs Resveratrol for longevity — what the human evidence actually says
- Lion's Mane vs alpha-GPC vs citicoline vs bacopa — four nootropics compared for cognition
- Olive Leaf vs Garlic for blood pressure — what the trial evidence actually shows
- EPA vs DHA vs ALA — which omega-3 do you actually need?
- P5P (Vitamin B6) vs Magnesium for PMS — which symptoms each fits
- Peppermint Oil vs Ginger for IBS — pain vs nausea, not interchangeable
- Phosphatidylserine vs Bacopa monnieri — membrane lipid vs Ayurvedic nootropic
- Pine bark (Pycnogenol) vs grape seed extract
- Pomegranate vs beetroot for blood pressure
- Probiotic strains compared: which strain for which condition — the strain-specificity problem
- Probiotics vs Prebiotics — live bacteria vs the fibre that feeds them
- Whey vs casein vs pea protein — which powder for which goal?
- Psyllium vs Inulin — soluble fibre vs prebiotic, which one for which gut?
- Quercetin vs Bromelain — which one fits which inflammatory complaint?
- Reishi vs Cordyceps — functional mushrooms compared honestly
- Resveratrol vs Pterostilbene — bioavailability, sirtuin claims, and what the human evidence actually shows
- Riboflavin vs CoQ10 for migraine prevention — two mitochondrial cofactors with trial evidence
- Saffron vs 5-HTP for mood — RCT-backed extract vs serotonin precursor
- Saffron vs St. John's Wort for mild-to-moderate depression — which one for which patient?
- Saw Palmetto vs Beta-Sitosterol — BPH and prostate health, and which one the trial data actually supports
- Saw Palmetto vs Pygeum for BPH — what the prostate trials actually show
- Saw Palmetto vs Stinging Nettle Root for BPH — separate or combined?
- Schisandra vs ashwagandha for stress
- Selenium vs Iodine for thyroid — when each helps and when iodine harms
- 5-HTP vs L-tryptophan vs SAMe — three serotonin-pathway supplements compared
- Spermidine vs Resveratrol — two longevity bets that haven't paid off
- Spirulina vs Chlorella — algae compared honestly
- Spirulina vs Moringa — two "superfood" green powders compared honestly
- Sulforaphane vs Curcumin — Nrf2 induction vs NF-κB inhibition, and what each one actually delivers
- Sulforaphane vs NAC for "detox" — what each actually does
- Tart Cherry vs Glycine for sleep — the food melatonin and the inhibitory amino acid
- Taurine vs Magnesium for Blood Pressure — which lowers it more?
- L-Theanine vs Lemon Balm for anxiety — daytime calm compared
- TMG vs SAMe for methylation — different inputs, different outputs
- Tongkat Ali vs Fadogia Agrestis — what does the human evidence actually look like?
- TUDCA vs NAC for liver — bile acids vs glutathione precursor
- Tyrosine vs Rhodiola for fatigue — catecholamine precursor vs adaptogen
- CoQ10: ubiquinone vs ubiquinol — does the form matter?
- Valerian vs Hops for sleep — herbal sedatives compared
- Vitamin D3 vs D2 — which form should you actually buy?
- Whey vs Casein protein — which one, when, and why
- Whey vs Plant Protein — leucine, satiety, and what the muscle-protein synthesis data actually shows
- Zinc forms compared: picolinate vs gluconate vs bisglycinate vs carnosine — which form for which goal
- Zinc Picolinate vs Zinc Citrate — bioavailability, GI tolerance, and what form to actually buy