What Is Ostarine and What Does It Do?


What Is Ostarine and What Does It Do?

Ostarine, also known as MK-2866, is a selective androgen receptor modulator (SARM). It was developed by GTx Inc to prevent muscle wasting and help with weight loss.

Since its emergence in the late 1990s, Ostarine has become one of the most well-known SARMs and has been shown to be very effective in both men and women. In this article, we will discuss what Ostarine is, how it works, and some of the benefits associated with it!


Introduction to Ostarine

What is MK-2866?

What is MK-2866?

Ostarine (aka MK-2866) is a selective androgen receptor modulator drug class and can be purchased from a number of online and pharma stores (hint...APH Science's Ostarine is one of our best sellers)

It is an anti-inflammatory steroid which has the ability to enhance the lean muscle mass and weight. The FDA has classified Ostarine for study use, and has no approval for human consumption. Despite this, the supplement has been widely accepted for research purposes and has become incredibly popular among amateur and recreational bodybuilders throughout the world.

Let's take a look at how it works, the science behind it and typical dosages.


What are SARMS?

What are SARMS?

SARMs are an androgen receptor modulating device that creates anabolic activity by stimulating an androgen receptor and increasing muscle growth. Steroids have the same ability though some properties are more important for the SARM.

Contrary to steroids SARM's have been found to be effective for preventing muscle damage. This means all but the only androgenetic effect occurs in muscle tissue, which is extremely effective in the growth of lean body mass - it is currently being studied as a potential treatment for muscle wasting and weight loss.

Ostarine binds to the androgen receptor (AR) and shows both anabolic and androgenic activity. Animal studies have shown Ostarine to increase muscle mass, bone density, and strength. It has also been shown to improve recovery from injuries and help with weight loss. Ostarine is currently being studied in clinical trials for its potential use in treating muscle wasting and osteoporosis.


Benefits of Ostarine include:

  • Increasing muscle mass

  • Increasing bone density

  • Improving recovery from injuries

  • Helping with weight loss


Uses of Ostarine (MK-2866)

Although Ostarine is currently being tested as an effective cancer treatment by Viking Therapeutics, most bodybuilders take the product to gain more muscle mass and improve weight loss speed.


How does it work?

Ostarine is known for its association with androgen receptors within human beings. Once bound this receptor further signals its ability to expand muscles faster. A method to enhance muscle growth involves changing genetic factors that increase protein synthesis and complement muscle growth and enhance muscle strength.

Unlike other chemicals attached to the androgen receptor (such as steroids), Ostarine is usually chosen by people because it has little to no side effects. Known as one of the 'weaker' SARMS, Ostarine is often dubbed the perfect SARM for 'beginners.'


MK-2866 Benefits?

Much of MK-2886's details have come from research in animals. Earlier studies examined a human model for the effect MK-2866 had. And anyone with bulk who needs skeletal strength. Unfortunately there isn't an established clinical study to evaluate Ostarine in a clinical study with sane people based on medical data and it's not regarded as a medical drug.


Other Uses for Ostarine

Patients suffering from medical problems like cancer and HIV can sometimes experience cachexia and wasting disorders. This product has originally been created for the prevention and treatment of such complications.

However, its effectiveness in creating fast muscle tissue makes it renowned among bodybuilders. The substance has been known for increasing testosterone levels as well as regulating body fat levels.


Best time to take Ostarine?

Best time to take Ostarine?

It is recommended to avoid consuming Ostarine at workouts or immediately after. as it can make you feel nauscious.

In fact, Ostarine is best taken in the morning pre-workout with food, although a lot of studies suggest ostarine can take its course anywhere during the night - so taking before bed or at dinner could also be a suitable time to take Ostarine.

Like all supplementation, listen to your body to find the optimal times for you - what works for one user of Ostarine may not necessarily work for another.

If taken daily - it doesn't really matter exactly when Ostarine is taken, providing it is taken with a balanced, healthy diet optimised for your goals.


Side effects of MK-2866

Currently, no studies are showing any adverse effects from Ostarine. Authors claim that this product may have better side effects than testosterone and may improve muscle mass.


Although this is a better alternative compared to anabolic steroid use there can be some possible risks involved.


Since Ostarine has been tested for human usage the side effects have not been fully described.

However, some mild side effects from Ostarine, including:

  • Headache

  • Nausea

  • Vomiting

  • Diarrhea

  • Lethargy

  • Dizziness

  • Rash


Legalities of Ostarine (MK-2866)

In some countries Ostarine has no prescription and is illegal for doctors to prescribe or take any to patients with serious health problems.



What does Ostarine do to the body?

What is this process? Ostarine binds itself with the androgène receptor of the human body. Once this receptor has been bound it indicates its ability to develop muscle more efficiently and easily.


Is Ostarine prohibited in sport?

Yes. It cannot be used in conjunction with anabolic substances. The WAMA Prohibited List includes the S1 anabolic agents. Despite a slow growth in positive testing, Ostarine was reported in 2015 as being 29 worldwide.

Many athletes must adhere to the World AntiDoping Organization Prohibited List in order to compete at high competitions. A strict world norm prohibiting use of substances or methods that may increase or cause adverse health effects. The WADA Prohibited List has 660 signatories worldwide and provides a platform for international athletes. USADA publishes drug profile articles to help identify the most dangerous substances and lists ostarine as one of their main 'toxins'.


Do everyday products contain Ostarine?

There are actually foods that have Ostarine, but they are illegal. Since Ostarine isn't allowed in America for humans to consume it, there are no legal medicines that contain Ostarine. The starch ingredient is not permitted on supplements.

Several food manufacturers illegally contain SARMs such as 'starine' and sell them as “legal steroid" or “research-only” substances. In addition, they can exclude or use falsely labelled 'Ostarines' to confuse consumers.

In particular, Ostarine is sometimes also known as 'anobosarm', MK-2866 or GTx-004.


Is Ostarine a steroid?

Ostarine combines the benefits of the more powerful SARM-based stream and the effects of some of these drugs – even steroid-free – without having any adverse effects. So to answer, no - Ostarine is not a steroid it is a SARM.

For more info on the difference, check out this post: here


Does Ostarine increase testosterone?

Today Ostarine is the most sought out SARM in bodybuilding because it is perfect for both advanced and experienced people. However, despite popular opinion - Ostarine has no effect on testosterone levels so you will not experience any drop or increase in testosterone.


Do I need a PCT for Ostarine?

Unlike other potent SARMs (such as RAD 140), a PCT is not necessary for everyone who takes Ostarine, but there are some exceptions. If you are taking ostarine in combination with other anabolic supplements or as part of a stack - then a PCT (such as APH Science Recharge) may be recommended.

It is important to consult with your doctor to see a PCT is right for you and have your bloods done regularly.



Ostarine is designed to help you bulk up by building muscle mass and preventing muscle wasting, similar to traditional steroids. However, Ostarine affects your body differently than other steroids on the market do. With Osteraine, you can avoid some of the more common side effects that come with taking steroids.

There is a reason this is our TOP SELLER.

Check out Ostarine MK 2866 from APH Science here!



Disclaimer: If you are considering using ostarine, it is important to speak with your doctor first. Ostarine is no 'magic pill' and is a powerful SARM that should be used with caution.

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