Dealing with hair thinning or hair loss? You’re not alone. About 35 million men and 21 million women have some degree of hair thinning and loss, according to the Hair Society. If you’re over 40, wear tight ponytails or recently had a child, you’re more likely to experience hair thinning. And we’re not just talking about the 100 strands the average person loses each day naturally. Fortunately, there are plenty of hair growth products available both over the counter and by prescription that can help you stop the thinning and reverse the shedding. Some of the best hair growth products come in various forms, such as shampoos, serums and topical solutions, laser caps and supplements. There are also gender-specific formulations due to differing genetic skin sensitivity between men and women, so the best hair growth product for men is not always going to be the best hair growth product for women. In this article, we explore the best shampoos for thinning hair with the help of our expert panel of dermatologists, trichologists and plastic surgeons.