Doctors have discovered many reasons for hair loss or thinning hair, including thyroid disease and iron deficiency. There are also different types of female hair loss ranging from subtle female pattern baldness to alopecia areata, an autoimmune disease that causes balding in patches. Still, even if you know exactly why your hair is thinning, it is difficult to stop it and figure out how to get thick hair naturally. (Discover the ONE simple, natural solution that can help you reverse chronic inflammation and heal more than 45 diseases. Try The Whole Body Cure today!) Watch as one woman gets the haircut of a lifetime: ​ ​ We picked the Art Naturals Organic Argan Oil Hair Loss Shampoo as one of the best products for thinning hair because it not only makes hair appear fuller, it stops it from falling out to begin with by blocking DHT—a hormone that causes hair loss by restricting blood to hair follicles. It is made with argan oil, aloe vera, burdock root, rosemary, and thyme. These ingredients stimulate the scalp for hair growth, moisturize your hair to add volume, and provide antioxidants and proteins, ensuring healthy hair. With more than 1,000 excellent reviews, it is a best-seller.