Thinning hair treatment is a common concern for many people, and Rogaine (7 letters) is one of the most popular treatments. Rogaine is a topical solution that is applied directly to the scalp and helps to stimulate hair growth. It is also known as minoxidil, and is available over-the-counter in many countries. Rogaine is an effective treatment for thinning hair, and can help to reduce hair loss and improve the appearance of thinning hair.