It used to be marketed to teenage boys as a testosterone booster that would stimulate muscular growth. But the reality was the amount of additional testosterone it could ever stimulate your body to produce would be so small it would never produce significant additional muscle growth. But if you all you're looking for is stronger erections, it might be beneficial.

From wiki.

"used as a dietary supplement since the 1980s in belief that it increases testosterone levels to aid body building or sexual enhancement in men, T. terrestris did not consistently affect testosterone levels in controlled studies, has not been proven to be safe, and may adversely interact with prescription drugs. High-quality research on T. terrestris extract has not been conducted, and no reviews indicate that it has strength-enhancing properties, or anabolic steroid effects for use as a body-building supplement or sexual enhancement. The Australian Institute of Sport discourages athletes from using T. terrestris supplements"

However, when I used it when I was younger, I felt like it did have an effect.

I actually take it now, but as a middle-aged man it has no effect. But I take it because I feel it helps me sleep slightly deeper.

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There are some supplements out there that people find helpful-like vitamin D, zinc, magnesium, and ashwagandha-but it's a good idea to get blood work done first so you know exactly where your levels are. Sometimes lifestyle changes like getting better sleep, regular exercise (especially weight training), managing stress, and cutting back on alcohol can also make a big difference.

I'd also recommend talking to a doctor who specializes in men's health or hormones. They can give you a clearer picture and go over options like TRT (testosterone replacement therapy) if needed.

Wishing you the best-glad you brought it up!

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