Supplements for new parents

The new-parent stack — practical and time-cheap

Sleep buffer — the most important target

Magnesium bisglycinate 200–400 mg elemental at bedtime (most adults are mg-short anyway, and the bedtime dose helps fragmented sleep). Glycine 3 g powder in water 30 min before sleep — among the cheapest evidence-based interventions for subjective sleep quality. Both are non-habit-forming and don't impair next-morning alertness when the baby wakes.

Mood and energy — vitamin D and omega-3

Vitamin D3 to a 25-OH-D target of 30–50 ng/mL. The first year of parenting often means less outdoor time; ambient vitamin D production drops accordingly. Omega-3 EPA+DHA 1–2 g/day has the cleanest evidence in mood for adults; DHA-dominant is fine; spend $20/month not $80.

Caffeine, smoothly — L-theanine

L-theanine 200 mg with morning coffee reduces caffeine jitter and improves the "calm focus" subjective quality of caffeine. Cheap, well-tolerated. Don't double the caffeine — fix the sleep instead.

If you're the parent who carried the pregnancy — keep going on prenatal

Continue a prenatal or transition to a postnatal/standard multivitamin with folate, iron, iodine, and choline at least through the breastfeeding year. If breastfeeding, see the postpartum guide for lactation-specific dosing. If you might conceive again soon, folate 400–800 mcg/day prevents the periconceptional gap.

Get bloodwork at the 6-week postpartum visit (or at any time if energy is unusually low)

CBC, ferritin, 25-OH-D, TSH, B12 with methylmalonic acid. Iron stores deplete with pregnancy and delivery blood loss; postpartum thyroiditis is common and can mimic depression; B12 deficiency develops more easily on disrupted-meal schedules. Address deficiencies in target-driven fashion rather than blanket-dosing.

Mental health screening — non-negotiable

Both parents should be screened for postpartum mood disorders. PPD is not the gestational parent's exclusive risk — paternal/non-gestational PPD has 10–15% incidence. The Edinburgh Postnatal Depression Scale takes 5 minutes; the PHQ-9 is also fine. If you have concerns, reach out — primary care, mental health professional, your child's pediatrician, or 1-833-TLC-MAMA (US). No supplement substitutes for this.