Dr. Woolery-Lloyd adds, "DS Labs Revita shampoo is very effective and highly recommended by dermatology leaders in hair research." She also notes that the included ingredient of taurine helps promote keratin production. It even made our hair feel soft—although not too squeaky—similar to some of the more high-end daily shampoos we've tested. Of all the shampoos we tested, this is the one we saw the most immediate and significant improvement in our hair thickness and volume. Coarse or curly hair, along with dry or color-treated strands, benefits from hydrating, sulfate-free formulas that help lock in moisture. That’s why Dr. Hartman advises those with finer hair to look for a lightweight, volumizing shampoo. For example, Dr. Woolery-Lloyd explains that people with fine hair often find that ultra-texturizing shampoos can weigh their hair down. But avoiding the use of heat styling tools is not the only way to make your hair appear thicker. While some are blessed with long and healthy locks, others have to put in that extra effort. In terms of hair goals, every woman desires thick and voluminous tresses. We're proud that our staff spans a wide range of ages, skin tones, hair textures, genders, and backgrounds, which means that we are able to fairly assess any beauty product that comes into the beauty closet. Without sufficient testosterone, hair follicles may weaken, shrink, and struggle to produce healthy hair. This occurs because testosterone and its byproduct DHT are closely tied to the health and function of hair follicles. However, it’s important to note that TRT isn’t guaranteed to reverse all hair thinning or hair loss, especially if other factors, like genetics, are also contributing. Consistent self-care, combined with regular medical check-ups, offers the best chance at maintaining hair health even when testosterone levels may fluctuate. One of the most effective ways to help protect hair from low testosterone effects is to lead a lifestyle that supports healthy hormone levels. Research shows that low testosterone can contribute to hair thinning, but it’s often an indirect link through hormones like DHT. Scientists are working to understand exactly how testosterone and DHT interact with hair follicles and influence hair growth. Since testosterone can influence hair growth, researchers have studied whether testosterone replacement therapy (TRT) can help with hair loss in people with low testosterone. Lifestyle changes—such as improving diet, staying active, prioritizing sleep, and managing stress—may help maintain testosterone levels and support hair health. Here are a few other reasons you may be losing your hair. Pygeum bark is well known as a potentially beneficial treatment for an enlarged prostate and prostatitis due to its DHT-blocking ability. Biotin can be taken as an oral supplement, but it’s also present in egg yolks, nuts, and whole grains. But a 2019 study suggests that biotin can help hair quality and texture. Biotin, or vitamin H, is a natural B vitamin that helps turn some of the food and liquids you consume into energy your body can use. A 2021 clinical trial of topical and oral finasteride found an improvement in men’s hair count after 12 weeks compared to a placebo. Testosterone is the most abundant and active androgen in the body of people with a penis.