Buy Andarine S4

Andarine is a Selective Androgen Receptor Modulator, otherwise known as a SARM. It was developed primarily for the pharmacological treatment of muscular atrophy which is onset by disease, such as MS and AIDS.

This SARM is often considered a milder alternative to ostarine or LGD 4033 in terms of anabolic effects, but this is compensated by the lack of side effects in human trials, specifically the prostate.

Why not checkout our SARM Library to discover more about this compound?

This product is now a liquid suspension. 50ML @ 25mg/ml. 

Lab measuring syringes are included in each order.

Research use only. Not for human consumption. 


70% Polypropylene Glycol, 30% Wheat Ethanol

Third Party Test Certificate


50ml / 25mg/ml

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  • Product Specifics
  • Delivery
  • Manufacturer Information

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Andarine S4 Information

We are a UK based company, and we aim to deliver domestic orders within 2 days. EU parcels generally arrive with 5 days, and international parcels can take up to 10 days.

You can find out more information by clicking the button below.

Our products have a HPLC tested purity of ≥98.0%

You can request a copy of the HPLC reports by contacting us

Delivery Information


Our products have a HPLC tested purity of ≥98.0%

You can request a copy of the HPLC reports by contacting us

Quality Standards

Our manufacturer complies to the following:

  • GMP
  • ISO 9001
  • CQC China
SARM Certificates

Andarine S4

  • An Overview of Andarine S4

    Andarine S4 is one of the more recent Selective Androgen Receptor Modulator (SARM) solutions to breakthrough, even though it had originally been abandoned during clinical trials by its parent company, the pharmaceutical giant GTX.


    Originally intended to be used to treat benign prostatic hypertrophy without bringing to the table the same kinds of disastrous side effects that common medications and pharmaceutical drugs inevitably entail (particularly the finasteride series of drugs), Andarine S4 never made it past the clinical trial stage and has been sitting in “limbo” ever since

  • Mechanism of Action

    Like all other SARMs, Andarine S4 is able to uniquely bind only to androgen receptors in muscle and bone as opposed to attacking the sex organs of the human body the way that traditional anabolic steroids will.

    Andarine S4 is unique amongst other SARMs in that it works to dramatically alter gene expression in an effort to improve and promote further protein synthesis and anabolic states, offering close to 35% of the “binding affinity” of traditional testosterone that has not been altered in any way whatsoever.

    On top of that, Andarine S4 will never end up converting to DHT or estrogen the way that traditional testosterone might. This eliminates a lot of the potential side effects that traditional testosterone inevitably brings to the table by both naturally produced testosterone as well as synthesized and externally sourced testosterone products.

    As if that wasn’t reason enough for the medical community to fall in love with Andarine S4, it also will not allow DHT to bind with prostate receptors. This is a major leap forward and is a big reason why GTX initially believed this particular chemical cocktail had the potential to be the “next big thing” in the fight against benign prosthetic hypertrophy.

  • Considerations

    Interestingly enough (and something that GTX was surprised to learn during their initial wave of testing as well), Andarine S4 is also one of the few SARMs to have been conclusively proven to impact the ocular system as well.


    More tests are necessary to fully understand why these chemical compounds are binding with androgen receptors in the eyes and throughout the ocular system, but trial after trial has proven that there is a direct relationship between the chemicals in this SARM and changes to the systems that dictate what we see.


    Like most of the other SARM products that have been created over the last 80 years Andarine S4 has a very short half-life. We’re talking about a half-life that stretches out between four and six hours only, guaranteeing that Andarine S4 is going to be flushed out of the system much faster than traditional anabolic steroid compounds.


    The bioavailability of this compound is also quite high, but it needs to be thanks in large part to that lightning fast half-life. A lower level of bioavailability would see fewer of the Andarine S4 compounds making their way into the bloodstream and actually delivering their promised payload before being flushed out of the body or broken down by other biochemicals in the bloodstream.


    GTX did recommend that a PCT routine was followed upon utilization of Andarine S4, and most agree that this is a smart course of action. It’s the best way to guarantee steady and consistent results from these chemical compounds while at the same time making sure that any of the ill effects (particularly those associated with the ocular system) are going to be anything but long-term or semipermanent.

    More research is necessary to fully understand the long-term health impacts of Andarine S4, but as highlighted above clinical trials have been put on pause. It’s unclear how GTX (or anyone else producing Andarine S4) are going to move forward from here.

S4 Is a SARM
Andrarine Androgen Receptor