Testosterone binds to androgen receptors in muscle tissue, directly stimulating protein production
I know keratin treatments are not, but the shampoo and conditioner I use have the following ingredients: Shampoo Aqua (Water),Sodium Laureth Sulfate,Coco- Betaine,Cocamide DEA,Glycerin,Glycol Stearate, Glycol Distearate, Cocamidopropyl Betaine, Polyquaternium-7,PEG-7,Glyceryl Cocoate, Lauryl Glucoside, Phenoxyethanol,PEG-150 pentaerythrityl Tetrastearate, Parfum(Fragrance), Butylphenyl Methylpropional, Hexyl Cinnamal, Linalool, Disodium EDTA,Hydrolyzed Keratin,Panthenol,Theobroma Cacao(Cocoa)Extract, Citric Acid, Methylchloroisothiazolinone, Methylisothiazolinone
iScience 23 , 101480 (2020)
Maintaining of youthful appearance: Growth hormone is associated with various anti-aging effects, such as improved skin elasticity and reduced wrinkles
Follow-up imaging often shows good callus formation