Testosterone undecanoate is one of the newest forms of anabolic-androgenic steroids based on testosterone. For medical purposes it is used for treating male hypogonadism (insufficient function of testicles), some spermatogenesis disorders or in fight against osteoporosis caused by a low production of androgens.

Testosterone undecanoate in bodybuilding

For its ability to cause a considerable gain on strength and muscle mass, testosterone undecanoate is very popular in the area of bodybuilding. It is interesting, that it is taken orally – despite the fact, that in most cases the orally administrated testosterone is decomposed in the liver and does not go to blood. Testosterone undecanoate, however, does not go through the liver at all – from the intestine it is absorbed by the lymphatic system. Testosterone undecanoate, together with methyltestosterone, is for this reason the only effective orally-taken version of testosterone steroids. Unfortunately, testosterone undecanoate is relatively quickly eliminated with urine. For this reason, it has to be administrated often to keep the effect stable.

Testosterone undecanoate is used for gains on muscle mass and strength, mostly during bulking cycles. It can be used alone, but in a majority of cases, bodybuilders stack it with other anabolic-androgenic steroids, for example with oxandrolone, nandrolone decanoate, nandrolone phenylpropionate or stanozolol.

Advantages of Testosterone undecanoate

Its huge advantage in comparison with testosterone cypionate and testosterone enanthate is the fact that it almost does not aromatize into estrogen. For this reason, there is almost no risk of Gynecomastia, excessive water retention or saving of fats in the area of hips. The aromatization is concern, only if high doses are taken.

Another very positive feature of testosterone decanoate is the fact, that its influence on the reduction of the natural production of testosterone is negligible.

Side effects of Testosterone undecanoate

Side effects are usually relatively mild; however, acne, increased aggression or hypertension can appear.

Testosterone undecanoate dosage

The average daily dose for men in the range from 120 to 280 mg is taken in three parts, which are taken after meals, if possible. Women should not use testosterone undecanoate at all because of its strong androgenic effects and a risk of virilisation.

Testosterone undecanoate is available in the form of tablets, which should be stored in cold and dark surroundings. They cannot be in contact with sunshine. Testosterone undecanoate is a part of the following products: Undestor Testocaps, Nebido.