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Tren A is a 19-nor steroid, and both Tren and Deca Durabolin (Nandrolone Decanoate) fall into this category, a class of steroids that refers to a structural change in testosterone that loses one carbon atom at the nineteenth position. In fact, Tren is a variation of Nandrolone. Tren has a double bond in the ninth and eleventh carbon, which slows metabolism, enhances binding to androgen-hormone receptors, and inhibits aromatization, making Tren one of the strongest steroids. Tren’s anabolic rate and masculinization rate are both 500, while testosterone has only 100 on these measures.

The relatively short chain of Tren A esters gives it a half-life of about 48 to 72 hours, and the nature of short-acting drugs requires frequent injections of Tren.

Like many other steroids, Tren can greatly enhance protein synthesis and nitrogen storage in muscle tissue. More protein synthesis means more muscle and further anabolism, which protects muscles when heat drops and speeds recovery. The more nitrogen stored, the higher the anabolic rate, and conversely, when nitrogen levels drop, the muscles break down and lose. When nitrogen storage increases, the synthetic environment becomes stronger, muscle tissue is protected, and the recovery effect is better.