Thinning hair in women can be caused by hormonal changes, post-pregnancy and birth control. Men and women can have thinning hair due to age, stress, poor diet, over styling, and smoking. Fortunately, Viviscal Professional is a nutritional supplement that feeds hair follicles from within the body, which strengthens and promotes growth from existing hair as well as hair that has slowed or stopped growing. Also, for thicker and healthier eyelashes we recommend LashesMD which contains peptides and natural plant extracts. This serum is applied as a liquid eyeliner and is non-irritating to the eye.