SkinCited is an evidence-based platform that evaluates supplements and natural compounds for skin health. We analyze peer-reviewed clinical research to help consumers understand which ingredients have scientific support for various dermatological concerns, from acne and aging to sun protection and skin barrier function.

How does SkinCited evaluate skin health supplements?

We review randomized controlled trials, systematic reviews, and meta-analyses published in dermatology and nutrition journals. Each ingredient is assessed for its level of clinical evidence, studied dosages, and safety profile, with particular attention to both oral and topical routes of administration.

Are the supplements on SkinCited FDA-approved for skin conditions?

Dietary supplements are not FDA-approved to treat, cure, or prevent any disease, including skin conditions. The FDA regulates supplements under different rules than prescription drugs or over-the-counter topical treatments. SkinCited presents published research findings, not medical recommendations.

Can I use SkinCited to replace my dermatologist's advice?

No. SkinCited is an educational resource and should not replace professional dermatological care. Skin conditions can indicate underlying health issues and may require prescription treatments. Always consult a dermatologist for persistent or severe skin concerns before relying on supplements.

Is SkinCited free to use?

Yes, SkinCited provides free access to evidence-based information about skin health supplements. Our goal is to help consumers navigate the complex landscape of beauty-from-within supplements with reliable, research-backed information.

Evidence-Based Supplement Reviews

Every skin claim cited.

We read the skin health studies so you don't have to.

Browse Ingredients

Evidence-based supplement research you can trust. We analyze peer-reviewed clinical studies from PubMed and grade every supplement ingredient on a transparent A–D scale. No sponsored rankings, no manufacturer influence — just science.

Featured Ingredients

Astaxanthin

antioxidant

Carotenoid antioxidant that spans the full width of cell membranes, providing both internal and external free radical scavenging; 6,000x more …

2 conditions studied

Biotin

vitamin

Water-soluble B-vitamin (B7) serving as a cofactor for carboxylase enzymes essential for fatty acid synthesis and amino acid metabolism; supports …

2 conditions studied

Collagen Peptides

collagen_protein

Hydrolyzed collagen provides bioactive peptides (primarily Pro-Hyp and Hyp-Gly) that stimulate fibroblast proliferation and upregulate endogenous type I and type …

5 conditions studied

Glutathione

antioxidant

Tripeptide (glutamate-cysteine-glycine) serving as the body's master antioxidant; inhibits tyrosinase and shifts melanogenesis from eumelanin (dark) to pheomelanin (light); detoxifies …

1 conditions studied

Green Tea Extract

herb

Rich in catechin polyphenols, particularly epigallocatechin-3-gallate (EGCG); potent antioxidant that inhibits UV-induced MMP expression, reduces NF-kB activation, may protect against …

2 conditions studied

Hyaluronic Acid

collagen_protein

Glycosaminoglycan that retains up to 1,000x its weight in water, supporting dermal hydration; oral supplementation increases circulating hyaluronic acid fragments …

3 conditions studied

View all ingredients →

Top Conditions

Acne

Affects approximately 85% of people aged 12-24; 12-22% of adult women experience acne

Comedones (blackheads, whiteheads) Papules and pustules Nodules and cysts (severe) +3

Aging Skin & Wrinkles

Universal process; visible signs typically begin in late 20s to early 30s

Fine lines and wrinkles Loss of skin elasticity and firmness Thinning skin +4

Collagen Loss

Universal age-related process; accelerated in post-menopausal women

Loss of skin firmness and elasticity Increased wrinkle formation Skin thinning +3

Dry Skin

Affects approximately 29-85% of adults depending on climate, age, and definition used

Tight or rough skin texture Visible flaking or peeling Itching +3

Eczema (Atopic Dermatitis)

Affects 15-20% of children and 1-3% of adults worldwide

Intense itching (pruritus) Dry and scaly skin Red or inflamed patches +3

Hair, Skin & Nails Health

One of the most popular supplement categories; hair/skin/nail supplement market exceeds $2 billion annually

Brittle nails Dull or thinning hair Dry or lackluster skin +3

View all conditions →

Recent Evidence Updates

Pine Bark Extract (Pycnogenol) for Aging Skin & Wrinkles

6 studies

Green Tea Extract for UV Protection (Internal Photoprotection)

8 studies

Lactobacillus rhamnosus for Eczema (Atopic Dermatitis)

20 studies

Polypodium leucotomos for UV Protection (Internal Photoprotection)

5 studies

Vitamin D for Eczema (Atopic Dermatitis)

12 studies

Guides & Resources

lifestyle

Hydration and Skin Health: What the Science Actually Says

The relationship between water intake and skin hydration is one of the most widely discussed yet poorly understood topics in skin health. The popular belief …

lifestyle

Diet for Healthy Skin: Evidence-Based Nutrition Strategies

The relationship between diet and skin health is supported by a growing body of epidemiological and clinical evidence. A 2020 systematic review in the Journal …

safety

Biotin Supplements and Lab Test Interference: A Hidden Risk

Biotin (vitamin B7, also known as vitamin H) is one of the most popular supplements for skin, hair, and nail health, available over the counter …

View all 10 guides →

Evidence Grading System

Every supplement claim on this site is graded on an A–D scale based on peer-reviewed clinical research from PubMed. Our algorithm evaluates study design (RCTs rank highest), consistency of results, sample sizes, and the overall body of evidence. No manufacturer sponsorship influences our grades.

A Strong Evidence

Multiple randomized controlled trials (RCTs) or meta-analyses with consistent positive results and large sample sizes.

B Good Evidence

At least one RCT with mostly consistent results across studies. Evidence suggests benefit but more research may be needed.

C Some Evidence

Small studies or observational data with some positive signals. Promising but insufficient for strong recommendations.

D Very Early Research

In vitro studies, case reports, or pilot studies only. Early-stage research that requires clinical validation.

Read our full methodology →

How It Works

No ads. No sponsored rankings. Just science.

Search PubMed

We search PubMed for every clinical study on supplement ingredients.

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Extract Findings

We extract the key findings — sample sizes, study types, and results.

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Grade A through F

We grade the evidence like a school report card — from A (strong) to F (negative).

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Clear Answer

You get a clear answer in seconds — does this supplement actually work?

Cited Health Network

Explore evidence-based research across multiple health domains.

HairCited

Evidence-based hair supplement reviews. Every claim backed by peer-reviewed rese

SleepCited

Evidence-based sleep supplement reviews. Every claim backed by peer-reviewed res

GutCited

Evidence-based gut health supplement reviews. Every claim about probiotics, preb

ImmuneCited

Evidence-based immune supplement reviews. Every claim about vitamin C, zinc, eld

BrainCited

Evidence-based brain and cognitive supplement reviews. Every claim about nootrop

WeightCited

Evidence-based weight management supplement reviews. Every claim about green tea

HeartCited

Evidence-based cardiovascular supplement reviews. Every claim about omega-3, CoQ

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.