What’s the Best Ostarine Cycle Length?

Best Ostarine Cycle Length

Do you want to do an Ostarine cycle, but don't know the best cycle length? I felt exactly the same way when I did my first SARMs cycle. Everyone had a different opinion.

Some said the best Ostarine cycle length was 4 weeks. Others said it was 8 weeks. Some said it was 12 weeks, and others still said it was 16 weeks. So, what's the right answer?

In this article, we'll explore the following:
  • The Best Ostarine Cycle Length
  • 4 Week Cycle Pros & Cons
  • 8 Week Cycle Pros & Cons
  • 12 Week Cycle Pros & Cons
  • …and more

So, if you want to pack on some lean muscle mass, shred body fat, and learn more about which of these Ostarine cycles is best for you, then keep on reading.

Know This First

Before you start looking at what Ostarine dosage you should take, if you should do an eight weeks cycle or whatever, is where you buy the Ostarine in the first place.

If you are getting low quality, fake Ostarine that's only 60% pure, your results will be substandard. I recommend you only buy SARMs from our approved vendors list.

It won't matter what your cycle length is, if you get bunk Chinese made Ostarine that gives you insane side effects (I know one guy who PERMANTLY damaged his vision from this).

I don't want to scare you, but seriously. Experienced users like myself know the importance of sourcing high quality SARMs, so I don't recommend you get it from anywhere else.

Ostarine Cycle Length

Ok, so now that we got that out of the way, let's talk about the best cycle length for your needs. First, keep in mind there's no “ideal cycle length,” because it will vary for your goals.

If you want better results, then obviously a longer cycle will do that. It will also increase the incidence of side effects however, too. So, it's about balancing pros and cons.

In my experience, the best Ostarine cycle length is between eight weeks and twelve weeks, although with SARMs, you can do cycles as short as four to eight weeks.

Ostarine has a very short half life, which means it starts acting in your body very quickly, as opposed to anabolic steroids which can take up to 4 weeks to even start working.

Four Week Cycle

Generally speaking, if you want to increase muscle mass, lose body fat, and still get some impressive benefits of Ostarine MK 2866, four weeks is the shortest cycle you should do.

In my opinion, just a few weeks is not ideal, but it can still yield good results.

Benefits of 4 week cycles:

  • Still Get Some Positive Effects
  • Mild Muscle Growth & Muscle Gains
  • Moderate Fat Loss & Fat Burning
  • PCT Might Not Be Necessary

Really the only true benefit of a short 4 week cycle is that testosterone suppression is at a bare minimum. Ostarine works fast, and binds to your body's androgen receptors within 24 hours, but testosterone suppression doesn't kick in for another 4-5 weeks.

Eight Week Cycle

The shortest cycle I've ever done, whether it was a bulking cycle or cutting cycle, was an eight week cycle. In my opinion, anything less is just a waste of time and not a true cycle.

Personally, I think that either eight or twelve weeks is best for an Ostarine cycle. The first month you're basically just getting the hang of it, learning how fast you can increase your lifts in the gym, and still adjusting your diet to your newfound hunger and metabolism.

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By the 3rd or 4th week, you're JUST starting to get into the swing of things, so to cut a cycle off at 4 weeks is stupid to me. They should be at least 8 weeks in my opinion.

Benefits of 8 week cycles:

  • Build More Lean Muscle Mass
  • Accelerated Fat Loss
  • Boost Protein Synthesis
  • Still Protect Natural Test Production

While I always recommend an Ostarine PCT as a practice, if you're doing a cycle of either 4 weeks or 8 weeks it probably isn't that necessary. Your natural testosterone levels are still high, because Ostarine is not very suppressive, especially after only 8 weeks.

12 Week Cycle

In my opinion, the BEST cycle length is for 12 weeks, whether your goal is to put on dense muscle mass, improve your body fat levels, or fight muscle wasting during a cut.

After 4 weeks, you will start to get the hang of things. Then, come week 8, you'll REALLY start to be in the groove. You're gaining a ton of muscle mass, lifts are going up, and you're starting to get into the swing of things.

Most of the best results come in the 3rd month, in my experience, because by that point you've adjusted to your new diet, new energy levels, and new lifts in the gym.

Benefits of 12 week cycles:

  • Build Dense Muscle Mass
  • Increase Protein Synthesis
  • Best Length for Muscle Building
  • Best Length to Burn Fat (In My Opinion)

While eight weeks isn't bad, in my experience, doing a twelve week Ostarine cycle is best.

Sample 12-Week Ostarine Cycle

If you want to pack on lean muscle mass, and regulate body fat levels, then taking Ostarine for 12 weeks is perfect. A 16 week cycle would risk potential estrogen related side effects and hormonal imbalances, but 12 weeks of a mild SARM like MK 2866 isn't enough to cause testosterone production to stop.

Like I said, by around week 8 or so, the user's body has begun to adjust to the new diet, new personal records, new energy, and other changes from this performance enhancing drug.

Here is my personal favorite Ostarine cycle:

  • Ostarine Dosage: 25mg/day
  • Cycle Length: 12 Weeks
  • PCT Length: 4 Weeks
  • Total Length: 16 Weeks

It's that simple. This cycle will help with building muscle, boosting energy, joint health, bone health, physical function, and much more. Even in a calorie deficit diet, you'll still build muscle and shred fat. That's how strong MK 2866 is.

Simply follow your cycle with a four week PCT (post cycle therapy). While I've said before, for Ostarine, post cycle therapy isn't necessary, but definitely will only help you.


In summary, if you want to pack on muscle mass, avoid muscle wasting, and experience fat loss at the same time, an Ostarine MK 2866 cycle is a great solution for this.

The ideal cycle length, from someone who's been in the bodybuilding world for years now, is 12 weeks. This gives you enough time to adjust, but not so much time your testosterone production gets shut down.

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LEGAL DISCLAIMER: The information on this page is intended for entertainment and information purposes only. It is not a substitute for professional medical advice. Always check your local jurisdiction’s laws before buying anything or doing anything.