
How Does the Hair Growth Cycle Work? A Physician's Guide to Why Hair Products Need 6 Months
6 hours ago
·How does the hair growth cycle work, and why does it take 6 months to see results from any hair product? Dr. Susan Lin, M.D. explains the four phases of follicle biology — anagen, catagen, telogen, exogen — and why MD Hair™ is built for the honest timeline of follicle biology, not for overnight-results marketing.
