The Hair Mask Strengthening Keratin + Arginine + Biotin from The Doctor Health & Care is a specially formulated hair mask designed to strengthen and revitalize hair structure. With a combination of keratin, arginine, and biotin, this mask provides intensive care for damaged and stressed hair. Keratin is an essential protein that helps restore hair integrity, while arginine promotes blood circulation in the scalp and can support hair growth. Biotin, also known as vitamin H, is recognized for its positive effects on hair health and can help make hair appear stronger and healthier. The hair mask contains 295 milliliters and is part of The Doctor Health & Care product line. It is suitable for all hair types and can be used regularly to improve hair structure and promote a healthy, shiny appearance. The application is simple and can be integrated into your weekly hair care routine.