According to Rina M. Allawh, a board-certified dermatologist in Pennsylvania, topical minoxidil, or Rogaine, is beneficial for both male and female hair loss, as well as hair loss caused by chemotherapy. The formulation is offered in two concentrations: 2% and 5% topical solutions, as well as 5% foam. Both work by preventing hair cells from dying off prematurely. Minoxidil has been shown to promote hair growth in men and women with androgenetic alopecia (AGA), which is most common among those who inherit the gene for it. People with female pattern hair loss are usually advised to try estrogens because they help stop hair loss when there's no other cause apparent. But since estrogen therapy carries its own set of risks, such as breast cancer, it must be used carefully. It may be necessary to try different forms of hormone replacement therapy to find one that works for you. Hormone therapy can also be given by mouth or by injection, but these methods are not as popular as skin patches or pills. Oral contraceptives contain both an estrogen and a progestin. These drugs are very effective at stopping hair loss but only if they're used properly. Too many hormones can cause additional problems, such as increased risk of blood clots. Long-term use can also lead to uterine cancer development. Hair growth supplements are also very popular. They come in the form of tablets, capsules, oils, and powders.