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SRM Andarine Leaning Matrix MK-677 by Xcel Sports Nutrition

$79.99 $59.99
(You save $20.00)
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Product Description

This product has been discontinued, check out our prohormone category to find other popular prohormone supplements.

Leaning Matrix to help you build lean muscle and lose body fat

S-4 Andarine

S-4 is a sarm, a selective androgen receptor modulator S-4 is the weakest in anabolic activity, but one of the most androgenic, being 1/3 as strong as testosterone at binding to the androgen receptor.

S-4 can cause a drying out of the muscle and the skin surrounding it, and in turn it binds very well to the androgen muscle receptors, hardening and sharpening the muscle.

S-4 can cause significant weight loss by binding to the androgen receptors – it allows fat to be oxidised, and it displays potent nutrient partitioning affects, causing more calories to be used to build and repair muscle. In addition, it has mild anti-oestrogen qualities, and will lower oestrogen over a 4 week period.


MK-677 reacts with the body similarly to Human Growth Hormone (HGH) that many people use for weight loss and muscle building. This is synthetic growth hormone, consisting of 5 amino acids. It is a selective growth hormone that doesn’t release cortisol (a steroid, that causes the body to hold onto fat. It is released by the adrenal glands when the body is facing stress). There are more benefits than muscle building, including improved sleep quality, increased muscle and connective tissue growth, boosted immune system, and decreasing fat, among other health benefits that are long term, like increasing bone density. It will not affect the natural production of growth hormones, in comparison to other growth hormones.


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