Goal hub·Skin & Hair·Reviewed June 9, 2026
Skin and hair supplements, separated from the gummy hype.
Collagen, biotin, and hyaluronic acid dominate the marketing; the trial data is narrower and more interesting. Collagen peptides have real skin-elasticity trials, biotin only helps true deficiency, and several antioxidants have photoprotection data. We rank by what was actually measured.
Ranked by evidence, top first.
Sorted by evidence tier, strongest first. Each supplement’s rating is its own; open any name for the full profile with dosing, forms, and citations.
- 01Vitamin AStrong
Essential for vision, immune function, skin health, and cell differentiation. Available as preformed retinol or provitamin A (beta-carotene).
- 02Vitamin B2Strong
Essential for energy production, cellular function, and metabolism of fats, drugs, and steroids. Also important for maintaining healthy skin and eyes.
- 03Vitamin CStrong
A powerful antioxidant essential for collagen synthesis, immune function, and iron absorption. Humans cannot synthesize it and must obtain it from diet or supplements.
- 04ZincStrong
Essential trace mineral involved in immune function, wound healing, DNA synthesis, and testosterone production. Second most abundant trace mineral in the body.
- 05Zinc PicolinateStrong
Highly bioavailable zinc form chelated with picolinic acid.
- 06AstaxanthinModerate
The most powerful carotenoid antioxidant, 6,000x more effective than vitamin C at quenching singlet oxygen (a specific lab assay, not general potency). Gives salmon and flamingos their pink color. Exceptional for skin, eye, and cardiovascu...
- 07Beta-CaroteneModerate
Orange carotenoid that converts to vitamin A as needed, safer than preformed retinol.
- 08Collagen PeptidesModerate
Hydrolyzed collagen provides bioactive peptides that stimulate the body's own collagen production. Supports skin elasticity, joint health, and gut lining integrity.
Dose and timing, from the trials.
Dose ranges, forms, and timing as used in the underlying clinical trials. Population notes call out who each trial enrolled.
For skin & hair, reviewed.
Each claim opens to the strongest PubMed-cited studies, the contrary evidence, and a plain recommendation.
No claim deep dives published for this goal yet.
Where this stack might fight itself.
Common conflicts in this category, plus how many documented interactions touch these substances.
Where this stack fights itself
- Biotin distorts common lab assays (thyroid panels, troponin) and should be paused before blood work, and supplemental vitamin A adds to prescription retinoid load. The checker flags both patterns.
In the database
- 202 documented pairings touch at least one of these substances.
- Scan a full routine for additive or conflicting effects before you combine.
Commonly suggested, thinner proof.
These are marketed for this goal but rate emerging, limited, or insufficient in the NutriStack library. Thin evidence is not the same as disproven; it means the human data is early or mixed. Treat them as experiments, not staples.
| Supplement | Evidence | Why it is on the watch list |
|---|---|---|
| GHK-Cu (Copper Peptide) | Emerging | GHK-Cu is a naturally occurring copper-binding tripeptide used in cosmetics and studied for skin remodeling, collagen signaling, and wound repair.... |
| Omega-7 | Emerging | Uncommon omega fatty acid supporting mucous membrane health and metabolic function. |
| Silicon | Emerging | Trace mineral important for bone, skin, hair, and nail health. |
Common skin & hair questions.
Quick answers drawn from the rankings and dosing above.
What are the best supplements for skin & hair?
The best-evidenced options for skin & hair in the NutriStack library are Vitamin A, Vitamin B2, Vitamin C, and Zinc. Each is ranked by its own evidence tier and links to a full profile with dosing, forms, and PubMed-cited sources.
What dose of vitamin c is used for skin & hair?
For collagen support, trials typically used Vitamin C at 500-1,000 mg daily (with collagen-containing meal or supplement). Doses are general ranges from the underlying trials, not personalized advice; confirm on the full profile and with a clinician.
Are skin & hair supplements safe to take together?
Biotin distorts common lab assays (thyroid panels, troponin) and should be paused before blood work, and supplemental vitamin A adds to prescription retinoid load. The checker flags both patterns. 202 documented pairings in the database touch at least one of these substances, so scan a full routine with the free interaction checker before combining.
Which skin & hair supplements have weak evidence?
Commonly marketed for skin & hair but resting on emerging, limited, or insufficient evidence: GHK-Cu (Copper Peptide), Omega-7, and Silicon. Thin evidence means the human data is early or mixed, not that the supplement is disproven.
Build your stack
Every ranking traces to a primary source.
These hubs come from the same library that powers the NutriStack app. Open any supplement for full dosing, forms, interactions, and citations.