NEW
💅 Keratin 3rd-party
BulkSupplements.com Hydrolyzed Keratin Powder - Gluten Free
Cost per serving
$0.06
500 servings · ~500-day supply
$30.97Price from Amazon.com
BulkSupplements.com · Amazon.com 0
See the offer Best Keratin for hair, skin and nails
Keratin (often the branded Cynatine form) is sold specifically for hair and nails. Below, the keratin products people use ranked by real cost per dose (to the commonly-studied 500 mg dose). A value comparison, not medical advice.
Updated September 2026
What the evidence actually shows
Limited — a few manufacturer-funded trials on solubilized keratin report benefits, but independent evidence is sparse. Treat the claims cautiously and compare on cost per dose.
Commonly used: brand-specific; independent evidence is thin.
How this list is built: these are keratin products ranked by real cost per dose across our whole keratin catalogue — not filtered or re-ordered by hair, skin and nails. We don’t hold per-product evidence for a specific use, so we don’t pretend to rank for one. Products whose own label says they are for something else are left out.
Background on keratin from the NIH Office of Dietary Supplements .
Ranked by cost per dose
NEW
💅 Keratin
Vitamatic Hydrolyzed Keratin 500mg per Serving…
Cost per serving
$0.11
240 servings · ~240-day supply
$25.99Price from Amazon.com
Vitamatic · Amazon.com 0
See the offer NEW
💅 Keratin
Vitamatic Hydrolyzed Keratin 500mg per Serving…
Cost per serving
$0.12
120 servings · ~120-day supply
$13.99Price from Amazon.com
Vitamatic · Amazon.com 0
See the offer NEW
💅 Keratin
Swanson Keratin (from Tibetan Wool) - Natural Supplement…
Cost per serving
$0.16
240 servings · ~240-day supply
$37.71Price from Amazon.com
Swanson · Amazon.com 0
See the offer NEW
💅 Keratin
Swanson Keratin (from Tibetan Wool) - Natural Supplement…
Cost per serving
$0.18
60 servings · ~60-day supply
$11.09Price from Amazon.com
Swanson · Amazon.com 0
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💅 Keratin
Nutricost Keratin Hydrolized Peptide Capsules - 500MG
Cost per serving
$0.25
60 servings · ~60-day supply
$14.95Price from Amazon.com
Nutricost · Amazon.com 0
See the offer See the full ranking, benchmarks and lab-tested brands on best keratin by cost per dose.
Frequently asked
Does keratin help with hair, skin and nails?+
Limited — a few manufacturer-funded trials on solubilized keratin report benefits, but independent evidence is sparse. Treat the claims cautiously and compare on cost per dose. This page ranks the products people take by real cost per dose; it does not claim a supplement treats or cures anything. Not medical advice — talk to a clinician about hair, skin and nails.
Which keratin is cheapest for hair, skin and nails?+
As of September 2026, the best value we track is BulkSupplements.com Hydrolyzed Keratin Powder - Gluten Free, 500mg per Serving, 250g (8.8 oz) (Pack of 1). The full ranking by cost per dose is above; Price ÷ servings ÷ dose — the number retailers rarely divide out.
How much keratin for hair, skin and nails?+
Commonly brand-specific; independent evidence is thin. This is a general reference, not a prescription — confirm the right amount for you with a clinician. Not medical advice.