Core Labs Mass + Rx 60 Caps


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The supplements used in bodybuilding and strength sports differ, among other things, in their intensity of action. Some are so universal that even complete beginners can use them. Others, on the other hand, have high potency and, as such, are aimed at advanced individuals. Mass + Rx from Core Labs certainly falls into this category.

Mass + Rx is a preparation with highly high anabolic potential. It is intended for people who want to increase lean muscle mass quickly and magnificently. However, it has such a strong potential that it can only be recommended to advanced individuals who have already used prohormones or other similar supplements.

Significantly, the composition of this supplement comprises only four ingredients, and only 2 of them are characterised by their typical anabolic potential. However, their effectiveness is high enough to provide excellent results.

The composition of this supplement consists of the following compounds:

– NAC (N-acetylcysteine) – using supplements with high anabolic potential can ensure rapid and impressive gains. However, the disadvantage of many substances of this nature is their side effects, particularly their negative impact on liver function. Therefore, it is worth using specific substances during each cycle to protect this organ. One of these is NAC, a common form of cysteine. This compound has a protective effect on liver cells. This action mainly involves reducing the adverse effects exerted by toxins and other harmful compounds. This makes NAC well-suited as a supplement to support further and protect the liver.

– 2,17-dimethyl-5-androstane-17-ol-3,3′-azine – this is the first of two ingredients with anabolic effects. Its potential is high, so it will not be suitable for beginners. This compound effectively stimulates processes related to the formation of new muscle fibres. At the same time, it provides a visible increase in strength, which is particularly important in terms of training results.

– 7-alpha-methyl-estra-4-ene-3,17-dione – chemically, this compound is similar to the popular nandrolone. Thus, its anabolic properties are at a high level. As a result, this compound provides a twofold benefit. On the one hand, it can contribute to a rapid and significant increase in lean muscle mass. On the other hand, its anabolic properties will also improve training performance. Similar action also means the compound will act synergistically with the 2,17-dimethyl-5-androstane-17-ol-3,3′-azine described above.

– Vitamin E – not everyone might have expected a vitamin in the composition of such a supplement. However, it must be recognised that vitamin E has fundamental properties for athletes. Firstly, it is a powerful antioxidant and can help remove free radicals from the body. Secondly, vitamin E benefits the heart and the entire cardiovascular system. Therefore, its correct level is fundamental, especially during such supplementation.


Due to its high anabolic potential, two capsules of Mass + RX can be taken daily. However, the manufacturer recommends breaking the daily dose into two smaller ones to enjoy the greater effectiveness of the formula. In such a scheme, take one capsule in the morning and one capsule in the evening.