Lash and Brow Care

Brow thinning has multiple causes: over-tweezing, aging, hypothyroidism (classically affects outer third), telogen effluvium, alopecia areata. Dr. Susan Lin explains the diagnostic patterns and the drug-free framework for fuller, denser-looking brows.

Lashes have fundamentally different anatomy from scalp hair: 4-11 month growth cycle, only 35-40% in anagen at any moment, and proximity to the ocular surface that makes safety paramount. Dr. Susan Lin (inventor on US Patent 8,206,695) explains the science.