13 Best Shampoos for Thinning Hair, According to Hair and Skin Experts

Hair loss and thinning hair happens for many reasons, including age, genetics, and hormonal changes. According to Hardik Doshi, M.D., lead surgeon of hair restoration at Ample, causes also include vitamin deficiencies or even weight loss. Luckily, certain hair products exist to specifically make your hair appear thicker and fuller. To help those with thin or flat strands, we talked to dermatologists, hair experts, and doctors to help us find the best shampoos for thinning hair.

“You should look for shampoos with ingredients (like biotin or caffeine) that help strengthen, moisturize, and balance your thinning hair,” says Rita Hazan, celebrity colorist. She explains that while thickening shampoos don't actually treat hair loss, they clean your hair follicles—eliminating any dirt, sweat, and buildup that can clog them. And that ultimately is what gives your hair a fuller, healthier look.

Meet the experts: Hardik Doshi M.D., lead surgeon of hair restoration at Ample; Rita Hazan, celebrity colorist and founder of Rita Hazan Salon; Marisa Garshick, M.D., F.A.A.D., board-certified dermatologist at Medical Dermatology & Cosmetic Surgery; Sam Ellis M.D., board-certified cosmetic dermatologist and clinical instructor of dermatology at the University of California.

Once you find the right thickening shampoo for you, remember that it’s going to take time. “Give the shampoo a trial for six to eight weeks of use before forming your opinion—patience is key,” says Dr. Doshi. He recommends keeping an eye on shedding, hair growth patterns, and scalp health during this period and taking pictures, to help you keep track of your progress.

After talking to hair professionals and dermatologists and conducting thorough research, we put together the best thickening shampoos for thinning hair below.