Ecdysteroids. It's interesting reading, actually. Genuine research is being done on it, so it's possibly not just some questionable extract of a fruit no one has ever heard of, like most supplements that claim GET GAINZ.
Apparently, it's
kinda like a steroid (though non-anabolic,) and what influences molting in insects. There are a bunch of newsfeed articles about people pushing for it to be banned as a PED,
like this one from just yesterday.
"According to DW, the researchers conducted a 10-week study of 46 men, who were each given either a placebo or a daily supplement that contained as much ecdysterone as 8.8 pounds of spinach. The participants all followed the same strength training program, but the men who received the ecdysterone pills developed more muscle mass, and had up to three times the strength gains as the placebo group. “Even more relevant with respect to sports performance, significantly more pronounced increases in one-repetition bench press performance were observed,” the authors wrote in their abstract. “These data underline the effectivity of an ecdysterone supplementation with respect to sports performance.”