There are many causes to hair loss, important to first get tested for treatable causes like thyroid disease, PCOS, or nutritional deficiency.1. Minoxidil which is also rogaine, can help both male and female hair loss. Works by increasing blood flow to hair follicles, prolonging growth phase of hair cycle, and increasing size of hair follicle.2. Rosemary oil is a great natural option for both men and women, there is some research showing efficacy, but more research is needed. For example one pap