Check a pair

Supplements for Skin & Hair

Skin & Hair: 34 compounds are used here, 11 of them at evidence level A. The most used is Bovine Collagen. Between them there are 174 documented interactions — which is why the order and timing of a stack matters as much as the choice.

0 compounds
0 interactions
0 evidence A

Where the evidence is strongest

Ranked by popularity, with what each one actually does

Bovine Collagen

Complete beauty & joint support

10-25g Morning evening Evidence A 90% absorbed

Marine Collagen

Anti-aging & skin health

5-15g Morning empty stomach Evidence A 95% absorbed

Collagen Peptides

Skin health & joint support

5-15g Empty stomach or anytime Evidence B 85% absorbed

Keratin

Hair repair & strengthening

Topical application Post shampoo Evidence B 85% absorbed

What these are, chemically

7 types
Proteins & Peptides 8 Botanicals 7 Compounds 6 Vitamins 4 Amino Acids 3 Blends & Formulas 2 Minerals 2

Choosing between forms

Same compound, different absorption
Bovine Collagen vs Marine Collagen 90% · 95% Bovine Collagen vs Collagen Peptides 90% · 85% Bovine Collagen vs Chicken Collagen 90% · 85% Bovine Collagen vs Undenatured Collagen Type II 90% · 95% Bovine Collagen vs Plant Collagen 90% · 70% Collagen Peptides vs Marine Collagen 85% · 95% Chicken Collagen vs Marine Collagen 85% · 95% Marine Collagen vs Undenatured Collagen Type II 95% · 95%

All 34 compounds

dose · evidence · documented interactions
Bovine Collagen Complete beauty & joint support 10-25g A 5 Marine Collagen Anti-aging & skin health 5-15g A 5 Biotin (Hair Health) Hair growth & nail strength 2500-10000mcg B 5 Collagen Peptides Skin health & joint support 5-15g B 5 Keratin Hair repair & strengthening Topical application B 5 Chicken Collagen Joint health & cartilage support 40-120mg B 5 Nail Formula Complex Complete nail health & strength 1-2 capsules B 5 Vitamin B7 (Biotin) Hair, skin & nail health 300-5000 mcg A 6 Bamboo Silica Hair & nail strengthening 5-40mg B 5 Tea Tree Oil Acne treatment & antimicrobial 5-15% topical dilution A 5 Undenatured Collagen Type II Joint health & immune tolerance 40mg A 5 Acai Berry Antioxidant protection & anti-aging 500-1500mg B 5 Chamomile Gentle skin soothing & anti-inflammatory Topical or 200-400mg oral B 5 Plant Collagen Vegan collagen support & antioxidants 2-5g C 5 Vitamin B3 (Niacinamide) Energy & skin health (no flush) 100-1000 mg A 5 Ceramides Skin barrier protection & hydration 30-100 mg (oral) or topical A 6 Horsetail Extract Hair & nail silica support 300-900mg B 5 L-Lysine Immune support & collagen synthesis 1-3g A 5 Pterostilbene-Resveratrol Anti-Aging and Longevity Complex Anti-aging & cardiovascular support 100-200mg pterostilbene + 250-500mg resveratrol B 5 Glycine Sleep quality & collagen support 3-10g A 5 DHEA (Dehydroepiandrosterone) Anti-aging hormone support 10-25mg daily B 5 GLA (Evening Primrose Oil) Women's health & skin support 1-3g EPO B 5 Linoleic Acid Essential cellular function & skin barrier health 2-5% of total calories A 6 NMN (Nicotinamide Mononucleotide) for Anti-Aging and Longevity Anti-aging & cellular energy support 250-1000mg daily B 5 Lutein & Zeaxanthin Eye health & vision protection 10mg lutein + 2mg zeaxanthin A 5 Bone Broth Collagen Gut healing & collagen support 20-40g powder B 5 Hyaluronic Acid Skin hydration & joint lubrication 120-400mg B 5 Calendula Skin healing & anti-inflammatory Topical or 200-400mg oral B 5 Resveratrol Anti-aging & cardiovascular health 100-500mg B 5 Astaxanthin Superior antioxidant & skin protection 4-12mg B 5 Copper Bisglycinate Collagen synthesis & iron metabolism 1-3 mg B 6 Vitamin B3 (Nicotinamide Riboside) Advanced NAD+ & anti-aging 250-500 mg B 5 L-Proline Collagen & joint support 1-3g B 5 Chaga Antioxidant protection & anti-aging 500-2000mg C 5

Common questions

What are the best supplements for skin & hair?

By usage and evidence: Bovine Collagen, Marine Collagen, Biotin (Hair Health). 11 compounds here carry evidence level A, meaning the effect was studied directly rather than inferred.

How many supplements for skin & hair can you take at once?

There is no fixed limit, but every added compound multiplies possible interactions. The compounds on this page have 174 documented interactions between them — check a pair before stacking it.

How long until supplements for skin & hair start working?

Depends on the compound. Each page lists first effects and peak benefit windows separately, because the two differ by weeks for most compounds.