SARM Ostarine Mk-2866 Review: The Most Popular SARM

Ostarine, otherwise known as MK-2866, Ostamucle or Enobosarm, the most popular member of a group of androgen receptors called SARMs. SARM is short for Selective Androgen Receptor Modulators. This might be a mouthful for some, so let us rewind a bit.

It is well known that steroids can cause insane muscle gain in just a short time. It is also known just how bad their side effects can be, ranging from the growth of bitch tits to high pitched voice to impotence. Steroids work by spiking the levels of androgens, or male hormones in the body. The increased levels tell the body to virilize or increase the male characteristics that include more muscle and more bone strength.

SARMs, on the other hand, instead of flooding the body with androgens, will target the specific muscle receptors that stimulate growth. They also bind to bone receptors to make them stronger and fat receptors to cause it to burn more quickly. It all depends on the type. If steroids are machine guns, SARMs are snipers.

What is Ostarine

MK-2866 is a SARM that was developed by a pharmaceutical company called GTx Incorporated located in Memphis, Tennessee. They were looking to create a drug that could help prevent muscle wasting or atrophy, a condition that mostly occurs with old age or due to conditions like cancer. Research is still in progress, but as early as the 2000s people realized the immense value of MK-2866 in bodybuilding.

Ostarine is the mildest of the SARMs currently known and has several benefits which we shall now look at.

Benefits of Ostarine (MK-2866)

Ostarine is an incredibly versatile SARM. It can be used for losing fat, gaining lean muscle, or even for post cycle therapy (more on this later). In summary, here are the benefits of MK-2866.

Ostarine is great for cutting fat.

Ostarine is great at cutting fat. The way this works is that since it binds onto lean receptors in the body, it prevents you from losing it even when you are on a low-calorie diet.

Most think that Ostarine is only for cutting, but they are wrong. Ostarine is great for bulking too, although it may not be as effective as other more powerful SARMs like Testolone (RAD-140). In a 6 week cycle taking 30mg daily, you can expect to gain about 5lbs. This is definitely something, considering that is pure lean muscle.

Ostarine reviews


If you want to get some popping veins, then Ostarine is the SARM for you. Its vascularity ability has been compared to the steroid Anavar. This shows you just how good it is, and you can usually expect peak results towards the end of your cycle.


An interesting aspect of Ostarine is that it promotes a high growth rate in injured tissue and bone. If you have recently broken a bone or received a flesh wound, Ostarine will help you get back on your feet sooner than you imagine.

Recommended Ostarine Dosage

Ostarine is a mild SARM, and hence has some of the highest dosages of all SARMs. The smallest dose you can take to give you some noticeable effects is 5mg, while the highest that has low side effects is 50mg, daily. So long as you play within this range, you are safe.

SARMs and supplements, in general, are taken in cycles. The cycle lets you monitor effects and side effects, and gives your body to recover during PCT. It is always recommended that you start off low, preferably at 50% of your dose and work up to the full dose. With MK-2866, you should start with 15mg per day on the first week, then increase by 5 mg weekly until by the last week you’re taking 30mg daily.

This cycle gives you great results without putting too much pressure on your body. It is not a wise idea to approach the higher side since you will be increasing the risk of side effects significantly.

Ostarine Results You Can Expect

When you start using Ostarine (without stacking), you can usually expect to start seeing some effects by the fourth week. If you’re doing it on a calorie deficit diet, you will notice your body getting leaner and tighter. You will also be experiencing heightened endurance as early as the first week.

For bulking, you need to do things differently. You will need to eat very well to fuel new muscle growth, as well as maintain your normal gym routine. A normal cycle of this taking 30mg daily (peak dosage), you can expect up to 6 lbs of lean muscle gained. If you stack it with other SARMs like LGD-4033 (Ligandrol), you can expect to pack even more muscle.

Ostarine effects

Post Cycle Therapy for Ostarine

Being such a mild SARM, Ostarine may or may not require PCT. If you stick to the lower doses and don’t stack it with other SARMs, your body can usually recover the testosterone suppression by itself within a few days. However, this varies from person to person, so you should monitor your body very closely.

If you stack it with other SARMs, extend your cycle over 8 weeks, use high doses or otherwise feel that you need PCT, then you should go for it. Nolvadex is a great choice for Ostarine PCT because it too is mild, and 50-100mg daily should have your hormones back in balance within a few weeks.

If you feel that you need a stronger PCT supplement, go for Clomid. It is more powerful than Nolvadex and will work more rapidly. Again, just listen to your body.

Ostarine MK-2866 vs Ligandrol LGD-4033

Ligandrol, or LGD-4033 as it is commonly known, is another SARM that is known for recomping. Recomping means cutting body fat while gaining lean muscle. While it is similar to MK-2866 in this regard, LGD-4033 is stronger and works better at building muscle.

Ligandrol, being a more powerful SARM, is taken at lower doses than Ostarine which is usually about 10-20mg per day. Ligandrol is more effective at bulking and will produce better results than Ostarine in any cycle, and some people like to stack it with Ostarine to maximize recomping power.

Ostarine Stacking

As we have hinted at in this article, MK-2866 is very good at stacking when you want to achieve more during your cycle.

SARM Ostarine

Ostarine Stack for Cutting

While MK-2866 is itself great for cutting, you can stack it with Cardarine (GW-501516) for maximum effect. Cardarine is great and increasing fat loss and improving physical endurance, which makes this the best stack for cutting. Such a stack will involve an 8-week cycle, taking 20mg Ostarine and 10mg Cardarine a day.

Ostarine Triple Stack for Bulking

One of the most popular stacks consists of the 3 most popular SARMs, that is, Ostarine, Andarine, and Cardarine. The Ostarine and Cardarine will help you lose fat while the Andarine is a powerful SARM that helps you gain massive lean muscle.

This is a very powerful stack that can be taken over 8 weeks with 20mg Ostarine, 20mg Cardarine, and 50mg Andarine a day. However, you should know that this is a highly suppressive stack cycle and should be immediately followed by an aggressive round of PCT over the same period.


All in all, Ostarine is a great SARM, whichever way you look at it. This is why it is so popular even among athletes and famous sportspeople. It gives you great results with little or no side effects and is also a great option for stacking with other SARMs.

Like with all other SARMs, the key is to make sure you get pure MK-2866. Lots of rogue vendors are out there looking to fleece unwary buyers. Some lace MK-2866 with hormones and other unsavory stuff that can give you some bad side effects. Make sure you always get it from a trusted source.