Marketing & Growth
Niacinamide for Thinning Hair Over 40: Expert Roundup & Real‑World Hacks
It was a rainy Tuesday in March 2024 when I walked into my favorite downtown barbershop, only to notice a new sign flashing: “NIACINAMIDE SCALP BOOST - 30-DAY CHALLENGE.” The barista-turned-stylist, a former chemist, handed me a tiny amber bottle and whispered, “Give it a month, and you’ll actually