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Specific probiotic strains, particularly Lactobacillus rhamnosus GG, have peer-reviewed data connecting gut flora to reduced acne severity in some studies.
Best for those with acne wanting to explore a gut-health-focused approach alongside (not instead of) a standard topical acne routine.
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Physician's Choice Probiotic 60 Billion CFU from Physician's Choice is a well-rounded option for those seeking those with acne wanting to explore a gut-health-focused approach alongside (not instead of) a standard topical acne routine. The inclusion of Multi-Strain Probiotic Blend (60 Billion CFU) provides includes lactobacillus and bifidobacterium strains. Best suited for those with acne wanting to explore a gut-health-focused approach alongside (not instead of) a standard topical acne routine.
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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.