Beta Ecdysterone

Beta Ecdysterone is found in:

Norateen Heavyweight II

Norateen X

Norateen XXX

Beta-Ecdysterone: the non-androgenic anabolic for muscle and strength

Beta-Ecdysterone (20-hydroxyecdysone, formula C27H44O7, molecular weight 480.6) is a naturally occurring plant steroid — a phytoecdysteroid found in plants such as spinach, quinoa and suma root. It has earned a reputation as "nature's anabolic steroid," but with a crucial difference from anabolic-androgenic steroids: it builds muscle without acting on the androgen receptor.

Mechanism of action: anabolic, but not androgenic

Rather than binding the androgen receptor the way testosterone and anabolic steroids do, beta-ecdysterone signals through estrogen-receptor-beta (ERβ) and the PI3K/Akt pathway. Laboratory studies on skeletal muscle cells show it triggers a rapid calcium flux that activates Akt, increasing muscle protein synthesis and muscle-fibre diameter (Gorelick-Feldman et al., 2008; 2010; Parr et al., 2015). Because it bypasses the androgen receptor, it delivers an anabolic effect without the androgenic side-effect profile of conventional steroids.

The pathway can be summarised as: beta-ecdysterone → ERβ + Ca²⁺/Akt activation → ↑ muscle protein synthesis & fibre diameter → more lean muscle and strength.

The human evidence

The standout study comes from the German Sport University Cologne and Freie Universität Berlin (Isenmann et al., 2019). In a double-blind, placebo-controlled trial, 46 young men completed 10 weeks of resistance training. The ecdysterone groups gained up to +2 kg more lean muscle mass than placebo (roughly +1.5 kg on the lower dose, +2 kg on the higher dose), and — most relevant to athletes — showed significantly greater increases in one-rep-max bench-press strength. The same hypertrophic effect was reproduced in cultured muscle cells. The anabolic effect was pronounced enough that the researchers recommended ecdysterone be reviewed by anti-doping authorities as a potential anabolic agent.

A clean profile

In the same trial, ecdysterone supplementation produced no disruption to serum testosterone or estrogen and no increase in biomarkers of liver or kidney toxicity — a favourable safety signal for a compound with steroid-like anabolic effects.

Key facts at a glance

• What it is: beta-ecdysterone (20-hydroxyecdysone), a natural phytoecdysteroid plant steroid, C27H44O7.

• Mechanism: raises muscle protein synthesis via ERβ and Ca²⁺/Akt signalling — not the androgen receptor.

• Muscle: up to +2 kg more lean mass than placebo over 10 weeks (Isenmann 2019).

• Strength: significantly greater 1-rep-max bench-press gains vs placebo (Isenmann 2019).

• Profile: no change to testosterone or estrogen; no liver or kidney toxicity markers (Isenmann 2019).

• Category: natural, non-androgenic anabolic support — not a hormone or steroid drug.

Full scientific references

• Isenmann E, Ambrosio G, Joseph JF, et al. Ecdysteroids as non-conventional anabolic agent: performance enhancement by ecdysterone supplementation in humans. Archives of Toxicology. 2019;93(7):1807–1816. • Gorelick-Feldman J, Maclean D, Ilic N, et al. Phytoecdysteroids increase protein synthesis in skeletal muscle cells. Journal of Agricultural and Food Chemistry. 2008;56(10):3532–3537. • Gorelick-Feldman J, Cohick W, Raskin I. Ecdysteroids elicit a rapid Ca2+ flux leading to Akt activation and increased protein synthesis in skeletal muscle cells. Steroids. 2010;75(10):632–637. • Parr MK, Botrè F, Naß A, et al. Ecdysteroids: a novel class of anabolic agents? Biology of Sport. 2015;32(2):169–173. • Báthori M, Tóth N, Hunyadi A, et al. Phytoecdysteroids and anabolic-androgenic steroids — structure and effects on humans. Current Medicinal Chemistry. 2008;15(1):75–91. • Dinan L. Phytoecdysteroids: biological aspects. Phytochemistry. 2001;57(3):325–339.

Beta-Ecdysterone is a naturally occurring phytoecdysteroid. This information is educational and describes the ingredient's physiology and the findings of published research; it is not a therapeutic or medical claim. Individual results vary.