A man’s testosterone level drops about 1 to 2 percent a year, starting around age 40. "Men with low T often lose many of those things; people say they feel old," he adds. —and podcasts and influencers preaching the powers of hormone optimization, should guys over 40 think about winding back their T clocks? But with a boom in testosterone-replacement clinics—by this point, who hasn’t gotten an ad for a service offering to test your T for under $100? And, of course, your testosterone level drops. Perhaps you're due to start treatment and want a baseline check of your liver, kidney, and prostate health If your testosterone levels are low, pay attention to your intakes of vitamin D, zinc, and magnesium. This means that rather than introducing external hormones, these supplements—typically comprised of vitamins, minerals, and botanicals—work by stimulating the body’s natural processes. Unlike synthetic testosterone replacement therapies, natural testosterone boosters rely on ingredients that help the body optimize its own hormone production. Sleep apnea, a common condition in people with overweight or obesity, can also disturb your sleep and reduce the time your body spends in those critical hormone-producing stages, says Dr. Kotlyar. Sleep has also been cited as a great natural way to boost testosterone levels, so you'll get a double benefit with this magnesium and sleep-enhancing mineral supplement. Magnesium may also help increase testosterone levels from a deficiency to a normal state in some cases. Although aspartic acid is a non-essential amino acid, meaning it's naturally produced in the body, supplementation can help increase the levels in your body. Your body will take some time to restart production of testosterone naturally. Online health platforms increase access for men who may not be comfortable seeking care in person, says Ramasamy. The collective decline in testosterone is likely behind the escalating use of testosterone replacement therapy (TRT). The health impacts of long-term low testosterone vary by age, but, in adults, low testosterone can weaken bones, decrease muscle mass, and lead to low libido. Occasionally, testosterone levels are normal but there are still symptoms of testosterone deficiency. For example, a 50-year-old man with testosterone levels of 8.5 nmol/l but no symptoms would unlikely benefit from treatment, even though his levels are outside the normal range. If your testosterone levels are less than 12 nmol/L and you have symptoms, you may benefit from testosterone replacement therapy (TRT). By your early 20s, your testosterone levels are the highest they’ll ever be naturally. For this reason, testosterone levels naturally change with time. Find positive ways to manage stress and you may naturally increase your testosterone. A consistent lack of good-quality sleep can also lead to weight gain, which can reduce your testosterone production. Your body makes the hormone while you sleep, and your levels are usually highest first thing in the morning.