SizeX (S-23 / Testolone / Ligandrol / Ostarine)

Matrix Labs
0.09 KGS
Current Stock:

SizeX STACK Sarm by Matrix Labs provides 60x 45mg : S-23 (10mg) / Testolone (15mg) / Ligandrol (5mg) / Ostarine  (15mg). Pharmaceutical Grade Quality


Similar to other SARMs, S-23 affects muscle and bone tissue and primarily produces anabolic results in these regions. The great thing about S-23 is that it doesn’t come with the side-effects that are caused by most SARMs in the market.

  • Helps Build Lean Muscle Mass
  • Increases Strength and Stamina
  • Helps with Fat Loss
  • Shows Minimal Water Retention
  • Develops a Hard Muscle Aesthetic

S-23 has been shown to help build lean body mass, and those who’ve taken it have reported better gain retention after finishing their cycle.



Testolone (RAD140) is a highly effective, oral SARM (Selective Androgen Receptor Modulator) currently being studied for both anabolic and neuroprotective effects. It is in a class of androgen receptor (AR) ligands that are tissue selective, developed to treat muscle wasting associated with cancer, acute and chronic illness and age-related muscle loss.

Recent research of Testolone shows superior lean tissue selectivity, and reduced androgenic side effects when compared to competing SARM compounds. This compound provides is being studied for neuroprotection as well; an important neural action of endogenous androgens that is relevant to neural health and resilience to neurodegenerative diseases, and to be as effective as testosterone in reducing cell death induced by apoptotic insults.




  • Easy to dose oral SARM that increases lean mass while remaining tissue selective in current research
  • Also known as Testolone
  • Test base for any sarm cycle
  • Icreased libido
  • Enhanced Recovery
  • Added value for research with pronounced neuroprotective properties
  • Myotrophic and neuroregeneration research compound




Ligandrol (LGD 3303) has become the number one choice of people for reducing weight. It plays an eminent role in mass gain and enhancing the overall strength of an individual. This androgen receptor modulator offers flawless oral bioavailability. As you intake the same, it binds to the androgen receptor, having higher selectivity and affinity. Thus, it leads to a rise in muscle size and strength.

  • Enhance bone density
  • Increased muscle activity
  • Radical size gains
  • Reductions in body fat

Ligandrol is useful in enhancing bone density, muscle activity, and muscle mass. Thus, it is considered to be a perfect option for bodybuilders. Though it enhances the building of muscles, it aids in the strengthening of the bones. Whether you are looking forward to cutting or bulking, your bones should be able to withstand such pressure and Ligandrol helps in achieving that.


Ostarine (mk2866)


Increased Muscular Output


Elevated training capacity


Gain muscle while burning fat


Ostarine is the SARM that is being developed for the prevention and treatment of muscle wasting and to improve muscular hypertrophy.
It is currently undergoing clinical trials and may eventually be the medical prescription for prevention of cachexia, atrophy, and sarcopenia and for Hormone or Testoserone Replacement Therapy.

As a research chemical, Ostarine belongs to a class of chemicals known as SARMs or selective androgen receptor modulators. SARMs create selective anabolic activity at certain androgen receptors and not others, hence their name. Compared to testosterone and other anabolic steroids and pro hormones, the advantage of SARMs such as (Ostarine) MK-2688 is that they do not have androgenic activity in non-skeletal-muscle tissues.

Ostarine is effective in not only maintaining lean body mass (LBM) but actually increasing it.



Serving Size: 1 Capsule

Servings Per Container: 60 caps x 45mg



This product is by no means intended to diagnose, treat or cure any medical condition and are not to be considered a medicine.