The 'Russian secret' with a Cold War legend and a spinach connection — but no reliable human evidence for muscle or testosterone.
Ecdysterone (also called 20-hydroxyecdysone), a steroid found in spinach and certain plants and insects, is marketed as a natural anabolic for muscle growth and athletic performance — sometimes nicknamed the 'Russian secret' of Soviet-era athletes.
The romance of ecdysterone comes from old Soviet and Eastern-bloc research, with persistent rumours that Russian Olympic athletes used it for an edge. Like the tribulus 'Bulgarian weightlifter' legend, this is a marketing dream: a mysterious compound, a secretive superpower's athletes, and results conveniently impossible to verify from decades-old, hard-to-find studies. The story sells far better than the data supports.
Most of the data are in animals or isolated cells. The famous claim that ecdysterone is more anabolic than some banned steroids comes from a German study — but it was small, partly cell-based, and has not been convincingly reproduced in robust human training trials. Major sports-nutrition reviews have concluded that ecdysteroids do little for muscle, strength or testosterone in humans. There was enough buzz that the World Anti-Doping Agency put ecdysterone on its monitoring list — a watch-list, not a ban — which the marketing sometimes spins as proof it 'must work'.
Here's a genuinely fun fact: ecdysterone is the compound behind the half-joking headlines that 'spinach is basically a steroid' and even prompted discussion of whether spinach extract should be restricted in sport. Popeye, it turns out, had a sliver of real biology behind him — ecdysteroids are real plant steroids. The catch is the same as always: the dose in a sensible diet, and the absorption from a capsule, are nowhere near what the dramatic lab claims assumed.
Creatine and protein — proven in humans, cheap, and not reliant on a Cold War legend.
Ecdysterone has a great backstory and some intriguing lab data, but no reliable human evidence for a meaningful muscle or testosterone benefit. The 'Russian secret' is mostly marketing. Use at your own risk and consult your doctor.
These are trusted places to buy. They're affiliate links — if you buy through them we may earn a small commission, at no extra cost to you. We only link to supplements with real evidence behind them.
Based on guidance from the NHS, NICE, Cleveland Clinic and peer-reviewed research.
General information, not a substitute for personal medical advice — always consult your doctor or a qualified health professional before making health decisions. If you are pregnant, breastfeeding, trying to conceive, under 18, or taking medication, speak to your doctor before starting any supplement.