Vitamin C
Citrus fruit, Bell peppers, Berries, Broccoli.
Back to TagsSkin symptoms can come from allergies, infection, medication reactions, autoimmune disease, hormones, nutrient deficiency, or high-dose supplement use. This page is a navigation aid, not a diagnosis or treatment plan.
Source mix: Official Reference, Traditional / Safety Reference, Systematic Review, Clinical Trial. Vitamin C Fact Sheet for Health Professionals Vitamin A and Carotenoids Fact Sheet for Health Professionals Zinc Fact Sheet for Health Professionals Skin Conditions and Complementary Health Approaches Vitamin E Fact Sheet for Health Professionals Biotin Fact Sheet for Health Professionals Riboflavin Fact Sheet for Health Professionals Niacin Fact Sheet for Health Professionals Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis Oral Administration of Hyaluronic Acid to Improve Skin Conditions via a Randomized Double-Blind Clinical Test Evening Primrose Oil: Usefulness and Safety Omega-3 Fatty Acids Fact Sheet for Health Professionals
Tag
Skin
Skin-related references connect nutrients and bioactives that support normal connective tissue, epithelial tissue, wound healing, barrier function, or that may be linked with skin changes when intake is inadequate or excessive.
skin healthrashflushingdry skinwound healingcollageneczemaacnehairnails
Linked Items
11
May Support
6
Deficiency Signs
2
Cautions
3
Quick Compare
| Item | Type | Relationship | Evidence |
|---|---|---|---|
| Vitamin C | nutrient | May Support | Official nutrient-role framing from NIH ODS. Official Reference |
| Vitamin A | nutrient | May Support | Official NIH ODS fact sheet; UL applies to preformed vitamin A, not provitamin A carotenoids from foods. Official Reference |
| Zinc | nutrient | May Support | Official NIH ODS fact sheet. Zinc is not a stand-alone treatment for skin conditions. Official Reference |
| Vitamin E | nutrient | May Support | Official NIH ODS fact sheet plus NCCIH caution about limited evidence for skin-condition supplements. Official Reference |
| Biotin (B7) | nutrient | Deficiency Sign | Official NIH ODS deficiency framing. Routine high-dose biotin for hair, skin, and nails should not be implied from deficiency signs. Official Reference |
| Riboflavin (B2) | nutrient | Deficiency Sign | Official NIH ODS deficiency framing. Official Reference |
| Niacin (B3) | nutrient | Possible Side Effect | Official NIH ODS adverse-effect framing; the niacin UL is based on supplemental niacin and flushing. Official Reference |
| Collagen Peptides | bioactive | May Support | Systematic-review and meta-analysis evidence; not an official DRI nutrient. Systematic Review |
| Hyaluronic Acid | bioactive | May Support | Randomized clinical trial evidence; product dose and study population matter. Clinical Trial |
| Evening Primrose Oil | bioactive | Caution / Limited Evidence | NCCIH skin and evening primrose oil summaries. Traditional / Safety Reference |
| Omega-3 Fish Oil | bioactive | Caution / Limited Evidence | NCCIH skin-condition evidence framing and NIH ODS omega-3 safety context. Traditional / Safety Reference |
Foods First
Vitamin A
Liver and some organ meats, Eggs and dairy foods, Orange and dark-green vegetables through provitamin A carotenoids.
Zinc
Oysters and meat, Dairy foods, Legumes and seeds.
Vitamin E
Nuts and seeds, Vegetable oils, Wheat germ.
Biotin (B7)
Eggs, Fish and meat, Nuts and seeds.
Riboflavin (B2)
Dairy foods, Eggs, Meat, Fortified grains.
Niacin (B3)
Meat and poultry, Fish, Nuts, Enriched grains.
Collagen Peptides
Gelatin, bone broth, skin-on poultry, fish skin, slow-cooked connective tissue.
Hyaluronic Acid
Bone broth and connective tissue foods in small/variable amounts, organ meats, root vegetables and leafy greens support general skin nutrient intake but are not major direct sources.
Evening Primrose Oil
Evening primrose seeds.
Omega-3 Fish Oil
Salmon, sardines, mackerel, herring, anchovies.
Medication & Safety Cautions
Vitamin C
Required for collagen biosynthesis and wound-healing biology; also functions as an antioxidant. | Very high intakes can cause gastrointestinal symptoms and may be unsuitable for some people prone to kidney stones.
Vitamin A
Supports epithelial tissue and immune function; preformed vitamin A excess can cause dry or peeling skin and hair changes. | The UL applies to preformed vitamin A, not beta-carotene from foods. | High preformed vitamin A intake can be especially concerning during pregnancy.
Zinc
Involved in immune function, DNA and protein synthesis, and wound healing. | Long-term high-dose zinc can interfere with copper status.
Vitamin E
Functions as a fat-soluble antioxidant in cell membranes; skin-condition treatment claims should be kept separate from basic nutrient-role claims. | The DRI UL applies to synthetic vitamin E from supplements and fortified foods.
Biotin (B7)
Biotin deficiency is rare, but reported deficiency signs include thinning hair, brittle nails, and a scaly red rash around body openings. | High-dose biotin can interfere with some laboratory tests.
Niacin (B3)
Supplemental nicotinic acid can cause flushing, itching, tingling, rash, dizziness, and low blood pressure at higher intakes. | The UL applies to synthetic niacin from supplements and fortified foods.
Collagen Peptides
Hydrolyzed collagen has human-trial evidence for modest improvements in skin hydration and elasticity, but study design and product differences matter. | allergy | kidney disease
Evening Primrose Oil
Commonly promoted for atopic dermatitis and skin inflammation, but NCCIH says evidence is not sufficient and oral evening primrose oil has not been shown helpful for atopic dermatitis.
Omega-3 Fish Oil
Omega-3 fish oil is sometimes promoted for inflammatory skin conditions, but skin-condition treatment evidence is inconsistent and high-dose supplemental use needs bleeding-risk review. | blood thinners | bleeding risk | surgery
Key Studies & Fixed References
These are the dated references used for this tag. Live research searches can change; these links explain the fixed wording shown on this page.
NIH Office of Dietary Supplements | Acquired 2026-07-24 | Official Reference
Vitamin C collagen synthesis, Wound healing context, Antioxidant role.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Preformed vitamin A, Provitamin A carotenoids, RAE conversion context.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Zinc supplement forms, Elemental zinc context, Zinc absorption and iron interaction.
National Center for Complementary and Integrative Health | Acquired 2026-07-24 | Traditional / Safety Reference
Skin-condition supplement evidence caution, Atopic dermatitis supplement evidence, Complementary health skin framing.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
Alpha-tocopherol, Natural and synthetic vitamin E, Tocopherols and tocotrienols.
NIH Office of Dietary Supplements | Acquired 2026-07-24 | Official Reference
Biotin deficiency signs, Skin rash, Hair loss.
NIH Office of Dietary Supplements | Acquired 2026-07-24 | Official Reference
Riboflavin deficiency signs, Skin disorders, Mouth and lip changes.
NIH Office of Dietary Supplements | Acquired 2026-07-24 | Official Reference
Nicotinic acid flushing, Niacin rash and skin reactions, Supplemental niacin UL context.
Nutrients / PubMed | Acquired 2026-07-24 | Systematic Review
Hydrolyzed collagen, Skin hydration, Skin elasticity.
PubMed | Acquired 2026-07-24 | Clinical Trial
Oral hyaluronic acid, Skin hydration, Skin tone.
National Center for Complementary and Integrative Health | Acquired 2026-07-24 | Traditional / Safety Reference
Evening primrose oil, Atopic dermatitis evidence caution, Skin inflammation traditional use.
NIH Office of Dietary Supplements | Acquired 2026-07-23 | Official Reference
ALA AI, EPA/DHA no official DRI, Fish, krill, algal, and plant omega sources.
May Support
Vitamin C
nutrientOfficial Reference
Required for collagen biosynthesis and wound-healing biology; also functions as an antioxidant.
Evidence note: Official nutrient-role framing from NIH ODS.
Sources: Vitamin C Fact Sheet for Health Professionals (2026-07-24)Official Reference
Vitamin A
nutrientOfficial Reference
Supports epithelial tissue and immune function; preformed vitamin A excess can cause dry or peeling skin and hair changes.
Evidence note: Official NIH ODS fact sheet; UL applies to preformed vitamin A, not provitamin A carotenoids from foods.
Sources: Vitamin A and Carotenoids Fact Sheet for Health Professionals (2026-07-23)Official Reference
Zinc
nutrientOfficial Reference
Involved in immune function, DNA and protein synthesis, and wound healing.
Evidence note: Official NIH ODS fact sheet. Zinc is not a stand-alone treatment for skin conditions.
Sources: Zinc Fact Sheet for Health Professionals (2026-07-23)Official Reference, Skin Conditions and Complementary Health Approaches (2026-07-24)Traditional / Safety Reference
Vitamin E
nutrientOfficial Reference
Functions as a fat-soluble antioxidant in cell membranes; skin-condition treatment claims should be kept separate from basic nutrient-role claims.
Evidence note: Official NIH ODS fact sheet plus NCCIH caution about limited evidence for skin-condition supplements.
Sources: Vitamin E Fact Sheet for Health Professionals (2026-07-23)Official Reference, Skin Conditions and Complementary Health Approaches (2026-07-24)Traditional / Safety Reference
Collagen Peptides
bioactiveSystematic Review
Hydrolyzed collagen has human-trial evidence for modest improvements in skin hydration and elasticity, but study design and product differences matter.
Evidence note: Systematic-review and meta-analysis evidence; not an official DRI nutrient.
Sources: Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis (2026-07-24)Systematic Review
Hyaluronic Acid
bioactiveClinical Trial
Oral hyaluronic acid has emerging clinical evidence for skin hydration outcomes in some studied groups.
Evidence note: Randomized clinical trial evidence; product dose and study population matter.
Sources: Oral Administration of Hyaluronic Acid to Improve Skin Conditions via a Randomized Double-Blind Clinical Test (2026-07-24)Clinical Trial
Deficiency Sign
Biotin (B7)
nutrientOfficial Reference
Biotin deficiency is rare, but reported deficiency signs include thinning hair, brittle nails, and a scaly red rash around body openings.
Evidence note: Official NIH ODS deficiency framing. Routine high-dose biotin for hair, skin, and nails should not be implied from deficiency signs.
Sources: Biotin Fact Sheet for Health Professionals (2026-07-24)Official Reference
Riboflavin (B2)
nutrientOfficial Reference
Riboflavin deficiency can include skin disorders, mouth-corner lesions, swollen cracked lips, and hair loss.
Evidence note: Official NIH ODS deficiency framing.
Sources: Riboflavin Fact Sheet for Health Professionals (2026-07-24)Official Reference
Possible Side Effect
Niacin (B3)
nutrientOfficial Reference
Supplemental nicotinic acid can cause flushing, itching, tingling, rash, dizziness, and low blood pressure at higher intakes.
Evidence note: Official NIH ODS adverse-effect framing; the niacin UL is based on supplemental niacin and flushing.
Sources: Niacin Fact Sheet for Health Professionals (2026-07-24)Official Reference
Caution / Limited Evidence
Evening Primrose Oil
bioactiveTraditional / Safety Reference
Commonly promoted for atopic dermatitis and skin inflammation, but NCCIH says evidence is not sufficient and oral evening primrose oil has not been shown helpful for atopic dermatitis.
Evidence note: NCCIH skin and evening primrose oil summaries.
Sources: Evening Primrose Oil: Usefulness and Safety (2026-07-24)Traditional / Safety Reference, Skin Conditions and Complementary Health Approaches (2026-07-24)Traditional / Safety Reference
Omega-3 Fish Oil
bioactiveTraditional / Safety Reference
Omega-3 fish oil is sometimes promoted for inflammatory skin conditions, but skin-condition treatment evidence is inconsistent and high-dose supplemental use needs bleeding-risk review.
Evidence note: NCCIH skin-condition evidence framing and NIH ODS omega-3 safety context.
Sources: Skin Conditions and Complementary Health Approaches (2026-07-24)Traditional / Safety Reference, Omega-3 Fatty Acids Fact Sheet for Health Professionals (2026-07-23)Official Reference