Strut Men’s Finasteride Hair Loss Formula contains a combination of prescription and nonprescription ingredients that target hair loss prevention and potential hair regrowth. Finasteride is a 5-alpha reductase medication used off-label in its topical form to reduce the amount of DHT in the scalp and help preserve your existing hair. Minoxidil is a vasodilator that may help reduce shedding, increase hair growth, and thicken hair follicles. Tretinoin is a vitamin A derivative that may help stimulate hair growth and exfoliate the scalp to help the medications penetrate deeper.