Enjoy thicker-looking and stronger-feeling hair with The INKEY List Caffeine Stimulating Scalp Treatment. Clinically proven to help to reduce hair loss, the formula works overnight to supercharge your beauty sleep.*Helping to create the optimum environment for growth, this innovative blend of ingredients work to improve the hair’s overall appearance of thickness. Infused with 1% Caffeine extract, the treatment encourages growth. 1% Redensyl helps to reduce fallout, while 1% Betaine softens, hydrates and nourishes each strand. Vegan.Free from alcohol, fragrance, gluten and parabens.* After three months of testing, 85% of testers showed significant improvement