As the only FDA-approved proven ingredient, the drug has years of research to back it up—and about 50% of women using it see improvement. “Minoxidil can enhance the size of the follicle so that it produces a bigger strand of hair,” says Wilma Bergfeld, a Cleveland Clinic dermatologist. Try Pantene Expert Minoxidil Topical Solution Hair Regrowth Treatment for Women ($24; pantene.com).
Sometimes a supplement is all you need. “The combination of fish protein, vitamin C, zinc, biotin, and niacin in Viviscal supplements encourages the body to produce healthier, thicker strands,” says New York City dermatologist Joshua Zeichner. ($50; viviscal.com)
Routine blood work can test your ferritin (iron stored in the blood) and vitamin D. Low levels can lead to hair loss, and the fix may be as simple as adding an iron or vitamin supplement. And hey, you’re probably overdue for a checkup anyway! (Cut pre-test jitters with these 8 insider tips for making any exam easier and more accurate.)