Two men walk into a gym. One does a 6-second all-out sprint, the other does 30 seconds. Same bike. Same effort. The 30-second man’s growth hormone peaks at 18.5 µg/L. The 6-second man’s peaks at 4.0. That’s a 450% difference from 24 extra seconds of work. I find that number genuinely useful, because it tells…

Let’s start with the number that launched a thousand supplement ads. In nine healthy men, two days without food raised 24-hour growth hormone production from 0.64 mg/day to 3.2 mg/day. That’s a five-fold increase — and it’s real, peer-reviewed, and reproducible. You’ve probably seen it quoted. Usually right above a button that sells you something….

I want to show you the single most alarming number I’ve come across in hormone research. In a study of 149 healthy men aged 16 to 83, deep slow-wave sleep made up 18.9% of the night in guys aged 16–25. By ages 36–50, that number had fallen to 3.4%. That’s not a decline. That’s a…

Here’s a number that stopped me cold. Once you clear your twenties, your body’s growth hormone output drops somewhere between 14% and 15% every single decade — and that’s not a supplement company’s stat, that’s from the endocrinology literature. Run that math into your forties and it gets ugly fast. By 60, some men are…

Let’s start with the honest truth most “best HGH supplement” lists won’t tell you: none of these products contain human growth hormone, and none of them work like the injections. If that’s what you’re looking for, no supplement on this page — or anywhere online without a prescription — is going to deliver it. What…