✓Backed by an actual peer-reviewed, randomized, double-blind, placebo-controlled trial—rare for a hair supplement—showing statistically significant improvement over placebo at 6 months
✓Drug-free and generally well tolerated, with only mild, mostly gastrointestinal side effects and no serious adverse events reported in the trial
✓Available over the counter without a prescription, and frequently recommended by dermatologists as an adjunct for early thinning