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Ostarine MK-2866 Explained: Benefits, Side-Effects & Dosages

You have probably already heard of the terms Ostarine and SARMs before reading this article. These products gained massive popularity in the last couple of years because of their potential effects.

They've been around since the early 2000s but recently started to gain popularity because research showed some fascinating effects like preserving and even increasing muscle mass.

However, they also carry some adverse effects that should be talked about.

In this article, we will show you everything you need to know about Ostarine. We will cover the benefits, side-effects, dosages & alternatives.

Note: Before reading further, it’s essential to notice that we do not advise using Ostarine. These products are still being researched and are not approved by the FDA for human consumption.

If you’re looking to improve your performance, we advise you to take the Advanced Anabolic Stack by Huge Nutrition, a safe and more reliable alternative.


What is Ostarine?

Ostarine is also known as MK-2866 or Enobosarm and is a SARM, which stands for Selective Androgen Receptor Modulator. It's designed to mimic the effects of testosterone by selectively bind to the androgen receptor.

Ostarine is designed by the pharmaceutical company GTx, which created it to treat muscle-wasting conditions like osteoporosis. They started researching MK-2866 in the early 2000s, and it's currently in phase 3 human trials.

Before the FDA allows use for human consumption, it needs more clinical studies on the safety and effects.

Nonetheless, athletes tend to use MK-2866 for its muscle-building effects. Some people swear by its effects on physical performance; however, there is not much evidence on humans to prove these effects.

While some researchers suggest that Ostarine is safer than steroids, there is some evidence that it could likely have some side effects related to hormonal imbalance and high blood pressure.

The Effects Of Ostarine & Potential Benefits

Ostarine is designed to mimic the effects of anabolic steroids but without the adverse side effects. It was initially intended to help people with muscle-wasting diseases like osteoporosis since it binds to the androgen receptors.

Researchers quickly find out that MK-2866 has many more interesting effects.

Let's talk about the most noticeable effects of MK-2866:

1. Increase Lean Muscle Mass

Multiple studies have shown that Ostarine can increase lean muscle mass at dosages as low as 1mg per day. A recent study from 2020 showed that both MK-2866 and Ligandrol had shown positive effects of lean muscle mass.

Another human clinical trial from 2011 showed impressive results after using MK-2866. The study consisted of 120 older men who either got a placebo or 3mg Ostarine. The last group saw a significant increase in lean muscle mass and almost no side effects than the placebo group.

2. Improve Physical Performance

Next to gaining muscle, most studies showed an improvement in physical performance as well.

Most users who took Ostarine for a cycle of 8-12 weeks noticed an increase in strength and also improved performance while working out.

3. Burn Fat & Insulin Resistance

Some prominent researchers suggested that Ostarine could possibly work as a cure for diabetes or any other metabolic syndrome.

MK-2866 can lower blood glucose, thus helps with improved insulin resistance.

Some users also noticed that Ostarine helped with burning fat but also could harden up the muscles.

As you can see, the benefits of Ostarine are very interesting for athletes as it can boost your performance tremendously. The World Anti Doping Agency (WADA) quickly noticed this and banned it for use in 2018 because of the increased usage.

The benefits of Ostarine are almost too good to be true, and in a sense, it is. Because researchers also found out that they could have severe side effects, like high blood pressure, headaches and nausea.

Therefore we would never advise you to take MK-2866 to boost physical performance. There are way better alternatives that are safe and could give you more gains, like the Advanced Anabolic Stack.

Optimal Ostarine Dosage

Let's talk about the optimal dosage for Ostarine. It can be pretty challenging to find the right amount; since this compound is still being researched, there isn't an optimal or most effective dosage established.

However, most users found the best dosage by experimenting on themself.

Ostarine is mostly used while cutting down. This is because it could help with preventing muscle loss on a caloric deficient diet. It's said that some people even notice muscle gains while cutting down and using MK-2866.

Most users seem to prefer a dosage for cutting between 10-20mg a day for a period of 8-12 weeks and for bulking a bit higher between 20-30mg.

However, researchers have shown that Ostarine could be effective at dosages as low as 1mg a day.

Most users advise to start with a dosage of 10mg and adjust accordingly. Researchers seem to agree that running it in larger dosages has diminishing results.

The half-life of MK-2866 is around 24 hours, making it very convenient since you can take the whole dosage one time per day. Some SARMs have a half-life of 6-12 hours, which means you need to take it 2-3 times per day.

There isn't an optimal time to take MK-2866. Most people seem to take it first thing in the morning, and some prefer to take it right before their training. However, there isn't a difference in terms of effects and results.

Are There Side Effects Associated With Ostarine (MK-2866)?

We just discussed the effects of MK-2866 and concluded that those are very beneficial for athletes; however, they also come with side effects that should be mentioned.

If we talk about SARMs, Ostarine is one of the mildest ones out there. For example, RAD-140 and Ligandrol are known to carry more side effects and some even need the use of a cycle support.

Nevertheless, researchers and other users noticed side effects while using MK-2866. Below you will find the most known side-effects:

High blood pressure
Testosterone Suppression
Hormonal imbalance side effects (Baldness, acne, etc.)
Testicle Pain

As you can see, the side effects can be pretty problematic. Generally speaking it seems to be hormonally based. Most users noticed that after taking Ostarine for a cycle, they got decreased testosterone levels.

The majority seem to counter these effects with a post cycle therapy supplement. If you're looking for the best PCT product available, we advise Rebirth PCT.


Many people question if Ostarine can cause testosterone suppression, and the answer to this question in short: Yes, it does cause suppression. However, it's very mild compared to other SARMs and almost all people recovered after using it.

It's up to you to decide if those side effects are worth it compared to the gains. In our opinion, you would be better of using something safer like the Advanced Anabolic Stack.

Nevertheless, if you're determined to take Ostarine, we advise you to at least use something like Rebirth PCT.

Ostarine Results: What Can You Expect?

MK-2866 binds selectively on the androgen receptors making it a very potent compound for increasing muscle mass. Most researchers and users concluded that using MK-2866 could lead to some serious increase in muscle.

How much muscle can you expect to gain after a cycle of Ostarine?

Well, that's a tricky question to answer because many variables come into play in the muscle-building process. For example, the most important ones are diet, training, and sleep.

Next to that, Ostarine seems to give different results based on dosage amount.

Most of you are eager to know about the actual results of Ostarine, and after reading hundreds of anecdotal experiences from MK-2866, we now know that the average increase in muscle mass is between 5-15 lbs.

Keep in mind that these are just anecdotal experiences and could vary by person. Ostarine has been known to decrease testosterone levels, and we, therefore, recommend using a post cycle therapy.

How Long Does Ostarine Take To Work?

Most MK-2866 cycles take between 8 and 12 weeks because it takes at least a couple of weeks to build up in your system.

Most users seem to notice effects after 14 days of usage. However, the weeks after you will fully notice the effects of Ostarine.

It also depends on the quality of the product you have. If you haven't noticed any effects after 14 days, you probably don't have a high-quality source.

starine In Bodybuilding & Other Sports

It's not a secret that this SARM has potent effects on physical performance, hence why it got such high popularity.

We all know that professional bodybuilders depend on the use of performance-enhancing drugs(PEDs), and that's why Ostarine could be very beneficial for bodybuilders as well.

We've learned that it could help with building muscle mass at a rapid rate. While Ostarine isn't as powerful as other PED's, it could have its place.

MK-2866 seems to be most used on an amateur level of bodybuilding and fitness since amateurs tend to use a lower dosage as professionals.

It's not only used in bodybuilding but also in several other professional sports. For example, a professional cyclist caught using Ostarine last year October and got suspended.

Before you even thinking about using Ostarine, you should know that WADA has banned it, and you will fail a potential drug test.

Final Verdict

Ostarine is an exciting and promising SARM that's currently still in development. It's now used mainly by athletes and bodybuilders to improve physical performance.

Researchers have shown that MK-2866 most definitely works and has mild side effects compared to other compounds. More research on humans is necessary to determine the full uses and effects and the long-term results.

We would not advise you to use Ostarine, simply because there isn't much research available, and the FDA hasn't approved it.

If you're looking to gain muscle and improve your physical performance, we would advise using the Advanced Anabolic Stack by Huge Nutrition, a safer and more effective alternative.

If you're keen on using this SARM, we would highly advise you to use a post cycle therapy supplement like Rebirth PCT.

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