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Ostarine (Mk-2866) Review: Effects, Ostarine Dosage & Where To Buy

Ostarine (MK-2866) is the original SARM (Selective Androgen Receptor Modulator). In this quick guide, you’re going to learn everything you need to know, including the correct Ostarine dosage range and effects you can expect from your first cycle.

We will talk in detail about the effects Ostarine can produce, and how it can be used productively both during a SARMs cycle and sometimes even during PCT (post cycle therapy).

You’ll also learn about the truth behind those Ostarine before and after photos and reviews because there are a lot of scams out there. Plus, we will discuss how you can spot online sellers who sell guaranteed pure SARMs.

What Is SARM Ostarine?

Ostarine, also known as Enobosarm, GTX024, and MK-2866, is the original SARM. It’s also informally known in the bodybuilding community as Ostamuscle (often just “Osta”).

It was developed by a company called GTx from 1997 onwards, reaching the level of phase II human trials in 2007. However, things have stalled since then.

Designed for muscle-wasting conditions like osteoporosis, its mechanism of action is still actually not fully understood. Additional trials up until 2018 on humans have looked into Ostarine being used for a variety of conditions, but so far not been found successful for anything other than preserving muscle stop

So it’s important to say here at the start of this Ostarine review that it has never been authorized for use by humans. It’s been in trials with humans, but it’s not commercially available, and certainly not for use by bodybuilders to preserve lean muscle mass while cutting fat. However, it’s one of the few SARMs which has been through pretty extensive initial human trials, with no dramatic side effects ever noted.

what is ostarine

How Ostarine MK-2866 Works

Ostarine is a Selective Androgen Receptor Modulator. It literally does what it says, it selectively binds to androgen receptors and modulates their responses.

But it does it selectively, unlike anabolic steroids which hammer androgen receptors with messages all around the body. SARMs like Ostarine can target androgen receptors in bone and muscles specifically.

So it’s this selective nature which is so appealing. It means that SARMs like Ostarine do not have the dangerous side effects that anabolic steroids do.

Ostarine Benefits For Bodybuilding

Because Ostarine was created to preserve muscle mass in people who have muscle wasting diseases, bodybuilders assume the Ostarine is only good for preserving muscle while you cut body fat during a cutting or recomping phase.

But that’s not actually the whole story about MK-2866. The full range of Ostarine benefits you can experience are:

  1. Although it’s not a potent muscle builder, a lot of people don’t realize the Ostarine can actually help to build muscle. It will always preserve your muscle, even in a calorie deficit. But alongside great diet and a gym routine that pushes you harder it can actually build muscle faster and leaner than you can naturally. It just won’t be as noticeable as with more aggressive anabolic SARMs like Andarine.
  2. You will burn fat faster using Ostarine MK-2866. Because it can preserve muscle mass it preserves strength in a calorie deficit. Which means you can fuel yourself enough to push through your routines, but you’ll also be cutting fat dramatically. It’s possible to cut 5% of your body mass in a single cycle and not lose any muscle mass using Ostarine.
  3. Because Ostarine is very mild it’s possible to use it after a SARMs cycle as well. So you could use a more aggressive SARM to build muscle on cycle, and then use small doses of Ostarine post cycle to preserve your gains.
  4. Ostarine produces results with very little testosterone drop. So it’s a perfect beginners SARM, and it’s great for people who already struggle with their testosterone levels.

Ostarine Dosage Guide

Let’s now talk about the sort of Ostarine dosage range you should be using to get the benefits of this very mild SARM.

During the SARMs cycle, if you’re cycling just Ostarine, then a ceiling of 40 mg per day is sensible. Above this effects seem to diminish, and you stand more chances of getting testosterone suppression.

A lot of people dose low at the start of a cycle, especially the first cycle, and increase the dose either during that first cycle or in the second cycle.

But on its own, an Ostarine dosage of up to 40 mg per day is absolutely fine. If you’re wanting to put on bulk as well as cut then you’re looking at that higher level dose. But if you just want to cut fat then 20mg is often more than enough.

Below about 20 mg per day effects can be very mild because Ostarine is a mild selective androgen receptor modulator.

You only need to dose Ostarine once per day because its half-life is quite long. Some SARMs require twice daily dosing, but that’s not the case with Ostarine which makes it even more easy to use.

Ostarine Dosage

Cycling & Stacking Ostarine

For your first Ostarine cycle, you should be conservative with your dosing and duration. You need to make sure that your body doesn’t have negative side effects from strong testosterone drop, although that’s unlikely using this mild SARM.

For me, I’d advise your first Ostarine cycle should look like this:

  • Dose Ostarine at 15 mg for the first two weeks
  • Increase Ostarine dosage to 20 mg in weeks three and four
  • Increase dosage of Ostarine to 30 mg in weeks 5-8
  • First cycle should be eight weeks (subsequent cycles can be pushed to 12 weeks easily)
  • PCT supplement may be required (but this is unusual)

If you’re looking to stack SARMs then Ostarine is great for cutting fat and maintaining muscle during a cutting or recomping phase.

Just make sure that when you stack Ostarine that you keep the dose lower. You have to remember that it is anabolic in nature and stacked with other anabolic SARMs those combined doses can be quite high and suppress testosterone significantly.

I’ll also mention here that you can use Ostarine post cycle. Because it’s only mildly suppressive, a small dose of around 15 mg during PCT can help to preserve your gains better with no effect on the PCT supplement’s ability to restore testosterone drop.

Ostarine Results From One Cycle

So let’s talk about the results you can get from a single cycle of Osta. Let’s say you dose 30 mg daily over eight weeks, what can you expect?

Well, I think it’s important to say here your results will depend on how hard you push yourself. SARMs aren’t magical like anabolic steroids, you have to do resistance training for them to get to work on your muscles in terms of growing them and hardening during muscle repair.

But a single cycle of Ostarine combined with great gym work and a non-fat diet can produce the following results:

  1. In a single cycle you can lose up to 5% body fat realistically. This doesn’t sound much but it’s actually a very significant amount of body fat to lose. You will only lose this if you work hard and have a superb diet.
  2. MK-2866 Ostarine will definitely preserve muscle mass. As your muscles repair, even in a calorie deficit, Ostarine will stop your body using them for fuel.
  3. Ostarine can also build muscle. Not much, but definitely your gains will be faster and harder than you can achieve naturally.
  4. After a single cycle of Ostarine, backed up by great diet and gym work, you can lose body fat, gain definition, and even build muscle.

Ostarine Results

Ostarine Before And After Photo’s & Reviews

I just want to get real with you guys here and talk about those Ostarine before and after pictures that you will see online.

This is an Ostarine review, but I’m trying to be honest with you about its limitations. But compare this to those reviews of Ostarine out there where you get lots of dodgy before and after photos of guys who are really weedy, and then after a single cycle it’s claimed that they lose all their body fat and gain muscle.

This simply isn’t true. They are often generic stock photos, or they are guys who have done loads of cycles of different SARMs, or they are using steroids as well.

At best you’re seeing someone who has had extreme response, at worst you’re being scammed.

The truth is that all SARMs require hard work and great diet. If you combine this with Ostarine though, in a single cycle I’m telling you that you will cut Nipper can fat, preserve muscle, and even gain muscle in a way that you simply can’t naturally.

Ostarine Side Effects

 Because Osta is so mild you won’t really get any side effects if you’re being sensible with your dosing. People talk about feeling tired with Ostarine. But that’s actually testosterone drop. Because they don’t expect it to happen, they don’t realize that what is causing it.

So although it’s unusual, Ostarine, especially at higher doses, can cause some testosterone drop. If you haven’t got high testosterone levels, then you’re obviously going to feel it more.

It’s the mildest SARM though, and you shouldn’t really have any other side effects apart from the potential for minor T level drops.

So always have a PCT supplement to hand. Nolvadex will be absolutely fine, and you’ll be able to take small doses of it should you need to. But for most people, you won’t get any side effects, and there won’t be any testosterone drop so you could use Ostarine even between cycles of other SARMs.

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Where To Buy Ostarine

So now you understand the Ostarine dosage range should be using, the effects you can gain, problems you could face from using Ostarine, and you know the truth about those Ostarine before and after photos, let’s tell you where you can buy 100% pure SARMs.

Because they are only research chemicals and aren’t legally available, it’s tough to get pure SARMs that are safe. You’re looking for online stores that offer independent third-party lab testing, with the results published on the product pages.

These are where I have bought SARMs from, and they are all highly recommended SARMs sellers. Any one of them will be a great starting point for experimenting with Ostarine.

  1. Science.bio

These guys have been around a long time. They rebranded recently because they started selling more than just SARMs, they now sell tons of other supporting supplements.

Let’s talk about Ostarine though. They sell loose powder and liquid Ostarine. I’d always advise against loose powder though because it’s a pain to deal with. But it is dirt cheap, costing just $30 for 1000 mg.

In terms of Ostarine liquid, 900 mg of Ostarine (concentration 30 mg/mL) retails at $45. This is a good price, and every independent third-party batch report is published on the product page.

  1. Proven Peptides

Proven Peptides are different because the SARMs they sell are made for them in the USA rather than China. China has actually stopped producing SARMs now so you’ll see more and more companies moving over to the higher grade and safer USA SARMs soon.

Ostarine from Proven Peptides costs $49.99 for a 30 mL dropper bottle. It’s dosed at 25 mg/mL, with a total dosage in the bottle of 750 mg.

  1. Swiss Chems

This company are not based in Switzerland, which is a confusion you’ll see discussed on sites like Reddit often. They are based in the USA and import their SARMs from China

They sell liquid injectable SARMs and oral capsule SARMs. You get 38 tablets for $75, each dosing 10 mg, so more expensive than the other companies I’m recommending (total dose is only 380 mg). However, you do pay more for the convenience of capsules. Liquid is tough to dose, powder is horrendous, so capsules are the quick and lazy solution if money isn’t a problem.

  1. SARMs4You

Last on my list of SARMs sellers, concluding this Ostarine review, are SARMs 4 You. I put them on the list because they are based in Europe, so great for you guys outside the USA. I did a test order six months ago though and it arrived fine and the SARMs worked brilliantly.

In terms of Ostarine pricing, they sell both loose powder and capsules SARMs. 60 capsules, each with an Ostarine dose of 10 mg, will cost you $55. So cheaper capsules than Swiss Chems. You have to spend more than $120 to get free global shipping though. However, if you can spend that much then it can actually work out really cost effective even if you’re in the USA.

UPDATE: SARMs4you and ProvenPeptides are out of business.

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