Strut Hair Booster contains a combination of prescription and nonprescription ingredients that target hair loss prevention and potential hair density improvements. Latanoprost is the active ingredient inside the glaucoma medication Xalatan. Latanoprost is sometimes used off-label for hair loss reduction and hair density improvements. Latanoprost can help stimulate the anagen (growth phase) of the hair, and may convert short, fine, low-pigment vellus hairs into thicker, pigmented terminal hairs. Studies have shown that topical Latanoprost can increase hair density and stimulate hair follicle activity in just 24 weeks as compared to placebo. Melatonin is well known as a sleep aid, but it may also have hair loss benefits when applied to the scalp in small amounts (that will not translate into sleepiness). Studies have shown that topical Melatonin may reduce the severity of hereditary hair loss (androgenetic alopecia), increase hair density, and reduce overall hair loss. Topical Caffeine is included for its anti-inflammatory and antioxidant properties, as well as the potential to reduce hair follicle shrinkage and reduce 5-alpha-reductase activity. Additionally, hair-healthy Biotin is included to potentially help strengthen growing strands and reduce breakage.