Bosley Professional Strength was created in partnership with the hair doctors at Bosley, the most recognized hair restoration brand in the world. Bosley Professional Strength haircare formulas contain more D.H.T. inhibitors than most other brands. The formulas are vegan, phthalate-free, sulfate free and paraben-free, making them safer and healthier. Bosley products contain the LifeXtend Complex, combining Biogenic, Ocean Marine and Plant extracts to create ideal conditions for the healthiest hair and scalp.