Vital Proteins
Vital Proteins Collagen Peptides Powder
Oral collagen studies generally show modest improvements in skin elasticity and hydration after around 8-12 weeks of consistent daily use — a slower, more gradual effect than topical actives.
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One of the more clinically studied hair supplements on the market, with published data specifically on its Synergen Complex for hormonally-linked thinning.
Best for women experiencing hair thinning linked to hormonal changes, such as during perimenopause or postpartum, ideally after ruling out other causes with a healthcare provider.
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Nutrafol Women's Balance Hair Growth Supplement is a premium offering from Nutrafol that targets those with women experiencing hair thinning linked to hormonal changes, such as during perimenopause or postpartum, ideally after ruling out other causes with a healthcare provider. The inclusion of Synergen Complex provides nutrafol's proprietary blend targeting multiple hair-thinning factors. Best suited for women experiencing hair thinning linked to hormonal changes, such as during perimenopause or postpartum, ideally after ruling out other causes with a healthcare provider.
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Vital Proteins
Oral collagen studies generally show modest improvements in skin elasticity and hydration after around 8-12 weeks of consistent daily use — a slower, more gradual effect than topical actives.

NeoCell
Type 1 and 3 collagen specifically are the types most studied for skin — worth checking the label, since not all collagen supplements specify which type they contain.

Sports Research
Biotin supplementation mainly helps people who are actually deficient — most people eating a varied diet already get sufficient biotin and won't see dramatic hair or nail changes from supplementing further.