How to prevent hair thinning? To reduce and prevent hair thinning, it is recommended to make lifestyle changes. A healthy diet along with regular exercise and a good night's sleep is encouraged for good health. In addition to this, take care of your hair by avoiding hairstyles that pull or stress the hair, avoid heat styling tools, and do not chemically treat or bleach your hair. Use products that are gentle on your hair. Use a soft hairbrush made from natural fibers and use a shampoo and conditioner with natural ingredients to repair and strengthen the hair and encourage new growth.