We first compiled a list of dermatologist-recommended and best-selling products for hair growth, including vitamins, shampoos, serums, topical solutions, hair oils, scalp scrubs, red light therapy devices, and scalp massagers. Each product was assigned to a Glamour tester and used consistently as recommended by an expert in order to see initial results—in most cases, for at least six weeks.
During the testing period, reviewers tracked changes in hair shedding (was there less hair loss over time?), fullness, and density, particularly along the hairline. They also evaluated the overall user experience: Was the product easy to incorporate into their routine? Did it have a pleasant fragrance and texture? For shampoos and topical treatments, we considered factors like lather, rinseability, whether it left residue, and if it was drying. For devices, testers noted comfort, convenience, and ease of use. Finally, we factored in value—how long the product lasted and whether its performance justified the price. The results helped us determine which products truly delivered and earned a spot on our list.
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