Supplements for plant-based athletes

The plant-based athlete stack — rationale by ingredient

Creatine monohydrate 3–5 g daily

Plant-based athletes start with lower baseline muscle creatine because dietary creatine is essentially zero. The supplementation effect size is therefore larger in this group — strength, power, sprint, and lean mass gains are typically more pronounced. Vegan creatine products use synthetic creatine (not animal-derived). 3–5 g/day with no loading needed.

Vitamin B12 — methylcobalamin 250–1000 µg/day or 2,500 µg/week

Plant foods do not contain reliable B12. Either consistent fortified foods (nutritional yeast, B12-fortified plant milks, B12-fortified cereals) or supplementation is mandatory — there's no third option. Deficiency causes irreversible neurological damage at late stages. Test serum B12 and methylmalonic acid baseline and periodically.

Algal omega-3 (DHA + EPA) 500–1000 mg/day

Plant foods provide ALA (alpha-linolenic acid) but conversion to EPA (~5–10%) and DHA (~1–5%) is low in most adults. Direct algal DHA/EPA supplementation bypasses the conversion bottleneck. Cardiovascular, neural, and anti-inflammatory benefits.

Vitamin D3 — test and correct (target 30–50 ng/mL)

Vitamin D status is dependent on sun exposure and dietary D (which is low in plant diets unless fortified). Lichen-derived vitamin D3 is plant-based-compatible (most pharmaceutical D3 is sheep lanolin-derived). Maintain serum 25-OH-D at 30–50 ng/mL.

Iron — test ferritin first; if low, alternate-day bisglycinate 60–120 mg elemental

Plant iron is non-heme (~5–15% absorbed vs ~25% for heme). Female plant-based athletes are at higher risk for deficiency. Test ferritin (target >30 minimum, ideally >50 for athletes). If low, alternate-day repletion with vitamin C co-dose. See iron deficiency anemia protocol.

Plant protein 1.6–2.0 g/kg/day with leucine attention

Plant proteins typically have lower leucine concentration per gram than whey. Two practical approaches: (1) consume more total protein (1.6–2.0 g/kg/day for resistance training); (2) blend plant proteins (pea + rice) or add free leucine (2–3 g per meal) to bring per-meal leucine to ~3 g (the muscle protein synthesis threshold). Soy isolate has the best amino acid profile among single plant proteins.

Beta-alanine 3.2–6.4 g/day

Plant-based athletes have lower baseline muscle carnosine (carnosine precursor histidine-β-alanine comes from meat). Beta-alanine supplementation raises carnosine and improves performance in 60–240 second exercise. Loading takes 4 weeks; tingling (paresthesia) at higher doses is harmless.

Zinc 15–25 mg/day (with phytate-rich diet)

Plant zinc bioavailability is reduced by phytic acid (whole grains, legumes). Soaking, sprouting, and fermentation reduce phytate. Modest zinc supplementation (15–25 mg/day) addresses the bioavailability gap; avoid chronic high-dose (>40 mg/day) to prevent copper deficiency.