BioStacksKeratin and hair
For hair support, Keratin is a supporting ingredient backed by research. Keratin is the primary structural protein of hair, skin, and nails. Supplemental keratin is typically solubilized (enzymatically hydrolyzed) to preserve bioactive disulfide bonds and improve absorption. In clinical studies, keratin reduces hair shedding and supports hair strength.
Effective dosing
Most evidence supports 250–500 mg of keratin daily. Clinical trials with Cynatine HNS use 500 mg/day. Most supplements provide 250–500 mg/day of solubilized keratin. Products below this range may not deliver meaningful results.
What the research says
The clinical evidence for keratin in hair is limited. Only 2 small clinical trials (12-16 weeks each) on hair, nail, and skin outcomes Learn more
