Philip Kingsley was founded by renowned trichologist, Philip Kingsley, who dedicated his life to researching and understanding the science behind healthy hair and scalp. The brand's philosophy is based on the idea that healthy hair starts with a healthy scalp, and all of its products are formulated to nourish and protect both the hair and scalp. One of the key ingredients in Philip Kingsley products is elastin, which is a protein that helps to improve hair elasticity and strength. Other ingredients commonly found in Philip Kingsley products include keratin, which helps to repair and protect the hair, and hyaluronic acid, which helps to hydrate and plump the hair.