Andarine Magnus

Catalogue entry: Andarine Magnus. Labelled content: 25 mg/tablet. Listed pack: 60 tablets. The amount identifies labelled product content, not an administration dose.

Identity and mechanism

Andarine, also called S-4, is a nonsteroidal selective androgen-receptor modulator. Its experimental selectivity concerns differences between androgen-responsive tissues, not an absence of activity outside muscle. This distinguishes it from Cardarine, which acts through PPAR-delta rather than the androgen receptor.

What the research measured

Gao and colleagues reported muscle, bone and pituitary-hormone responses in castrated male rats in Endocrinology in 2005. That model addresses androgen deficiency. It cannot establish the size of a benefit in trained adults, compare sporting performance with Ostarine, or identify a safe human exposure.

Sporting claims and limitations

Interest in physique sport centres on muscle retention and a leaner appearance. These remain different questions from the animal endpoints. Suppression of reproductive-hormone signalling is an important experimental finding. Visual complaints discussed online cannot provide a reliable incidence or prove reversibility. Broader SARM safety warnings also describe liver and cardiovascular concerns.

Product identity and documentation

For this product, the useful starting point is the declared compound, presentation and quantity selected above. A supplier label or photograph is not analytical confirmation. Check that any batch report names S-4, identifies its analytical method and corresponds to the actual lot. A generic purity percentage cannot establish identity, contaminants or suitability for human use.