May support hair and nail health.
Effective Dose
500 mg
Onset
2-4 weeks
Cost
Mid-range
Cycle
Keratin can be taken daily.
Why not higher?
7 things you need to know
What it does
May support hair and nail health.
Worth it?
5/10. Keratin supplements might offer some support for hair and nail health, but the evidence is limited and results can vary. It's not a magic bullet, but could be considered alongside other supplements and a balanced diet.
How much to take
500 mg
Price
Moderate ($15-30/month)
How fast it works
Takes 2 to 4 weeks to notice
Safety
Check if: pregnancy, breastfeeding
What people say
Users may notice subtle improvements in hair strength and nail thickness over time. Some may not notice any difference.
Keratin is a fibrous structural protein naturally found in hair, nails, and the epithelial cells that make up the outer layer of the skin.
"Users may notice subtle improvements in hair strength and nail thickness over time. Some may not notice any difference."
Research backing for this ingredient
Some evidence, more research needed
Limited
Not yet
Mixed opinions in scientific community
"The evidence supporting keratin supplementation is mixed, with some studies showing benefits while others report no significant effects. More research is needed to confirm its efficacy."
Keratin supplements provide building blocks for hair and nails. Some evidence suggests they can improve strength and appearance, but results vary.
Products below minimum dose are likely ineffective
When
Any time
How
500 mg
Food
Take with or without food.
Noticeable changes in hair and nail quality may take several weeks of consistent use.
Keratin can be taken daily.
Check for specific interactions.
Keratin is categorized as a amino acid.
Scientific consensus score: 4/10.
Evidence quality: WEAK.
Add Keratin to your stack analyzer or compare it with other ingredients.
Not medical advice. Always consult a healthcare provider.