Benefits
Joint comfort and flexibility
In a randomized, placebo-controlled trial, solubilized keratin supported reductions in joint discomfort and improvements in flexibility and range of motion.
Connective-tissue protein
Keratin supplies sulfur amino acids used in connective tissue, supporting the maintenance of joint and cartilage structures.
Antioxidant sulfur support
The sulfur in keratin supports the body's antioxidant systems, relevant to the oxidative stress involved in joint discomfort.
Mechanism of action
Sulfur amino acid delivery
Solubilized keratin provides bioavailable cysteine and other sulfur amino acids used to build and maintain connective tissue and antioxidant molecules.
Anti-inflammatory support
Keratin supplementation is studied for lowering joint inflammatory markers, contributing to its comfort benefit.
Clinical trials
Randomized, double-blind, placebo-controlled trial of solubilized keratin for joint health. (Beer et al. 2013, Journal of Dietary Supplements)
Adults with joint discomfort.
Solubilized keratin supported reductions in joint pain and improvements in flexibility and range of motion versus placebo.