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Mutagenic Labz Ostagainz contains Ostarine (also known as MK-2866). This is one of our best-selling SARMs for lean muscle gains with minimal side effects. Ostarine is perfect for those who want something safer than prohormones but more powerful than a natural testosterone booster.

  • 10mg Ostarine
  • 5mg Piperine for improved absorption
  • Vegan-friendly (veggie caps are used for all Mutagenic Labz products)
  • A great alternative to prohormones
  • Clinically proven to build muscle and strength
  • Anabolic (even at doses as low as 3mg)
  • Gains of 3kg in 3-4 weeks possible
  • Targeted anabolic effects in muscle tissue only
  • Does not have any androgenic activity
  • Improves endurance and strength
  • Boosts fat loss
  • Promotes healing and injury repair
  • Powerful joint healing abilities
  • Non-liver-toxic
  • Minimal side effects

What To Expect From Mutagenic Labz Ostagainz

Ostarine’s effects are solely targeted on muscle tissue. It increases muscle strength and size very rapidly but won’t impact on any unwanted areas such as the hairline or prostate. If you use Mutagenic Labz Ostagainz over a 4-6 week cycle, you can enjoy lean muscle gains of up to 3-4kgs. These gains are supported by official research and studies.

Mutagenic Labz Ostagainz doesn’t just offer anabolic effects on your muscles, it also offers a host of other impressive benefits. Proven to have a number of health and wellness benefits, it can enhance tissue regeneration, reduce inflammation and increase fat loss. It can also improve your mood.

Mutagenic Labz Ostagainz also has anti-catabolic properties, meaning you can diet more aggressively or for longer whilst preserving your muscle mass. Retaining muscle during a diet phase is a key aspect to improving body composition successfully while maintaining all your hard work! You’ll also retain more strength so you can train harder and heavier, for longer. All leading to a positive cycle of lean gains.

Health Benefits of MK-2866

MK-2866 has a host of health benefits far beyond its muscle building and fat burning abilities. MK-2866 is renowned for its healing properties particularly joint repair and bone health. Furthermore, it helps to reduce LDL cholesterol and triglycerides which, in turn, improves insulin resistance. These are all things which can be attractive to bodybuilders looking to gain mass and strength.

Less time out for recovery (or less soreness during your next training session) means you can train more frequently, resulting in a greater workload throughout your training week. This is likely to result in greater muscle growth from the training stimulus and faster results.

In one human study on 120 healthy elderly people, Ostarine significantly improved insulin resistance and lowered blood glucose levels. In fact, the results were similar to a well-known anti-diabetic drug Metformin.

Ostarine for Bodybuilding

Ostarine is hard to rival, being dubbed as the “most well-rounded SARM” amongst its loyal fans. Most bodybuilders swear by its safety and efficacy. Most users consider it a clean compound since it helps them increase pure muscle mass and burn fat with minimal side effects. Users also claim that the quality gains from Mutagenic Labz Ostagainz are easy to maintain for the long-term. A very important deciding factor for those looking for long-term, consistent progress.

Some bodybuilders who choose to use steroids also commonly take SARMs such as Ostarine to support their PCT phase or bridging between cycles to maintain muscle gains.

How To Use Mutagenic Labz Ostagainz

Ostarine (MK-2866) can be used by itself or stacked alongside other SARMs and natural testosterone boosters such as Mutagenic Labz Metamorphosiz and Olympus Labs Test1fy.

The half-life of Ostarine is approximately 24 hours so the full dosage can be taken once per day.

For men, the recommended dosage is 20-30mg per day. For women, the recommended dosage is 5-10mg per day.

Ostarine is suitable for women in very low doses, recommended only for experienced female athletes. For women looking to use SARMs, it is always advised to thoroughly research and understand the implications and potential side-effects. Staying at low dosages is key to avoiding unwanted side-effects but there are always risks to consider.

The recommended course length is 8-12 weeks followed by a mild PCT such as Mutagenic Labz Regen-T.

Additional information

Weight50 g

MK-2866 (Ostarine)


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7 reviews for Mutagenic Labz Ostagainz (MK-2866) 10mg x 60

  1. Patrick Weber

    Can’t go wrong with Mutagenic Labz and awesome fast shipping, ordered late almost 6 O’clock but emailed customer service to see if there’s any chance they could still get it out to me, and they managed to get it out to me for next day delivery! Arrived next day! Amazing service as always and top quality products.

  2. Brian Jackson

    Impressed with Mutagenic first cycle on its own to test run and then stacked it with S4 and GW501516 – best stack I’ve ever used for fat loss, lean muscle gain (strength gains aren’t amazing but that’s not really my goal). Overall it’s the best for body recomposition hands down.

  3. Anonymous

    Fast delivery and fast shipping. After 4 weeks of use, I noticed that I gained 4 kg. The results are satisfactory.


    As usal quick delivery and solid product. It’s legit and good quality .Recomened Mutagenic labs as had few products now and all are fire !!!

  5. Ashley Morris

    Really happy with the service I received my order today really fast delivery. From my past experiences I have taken anabolic steroids and also sarms and from what I found out from personal experience sarms gives you that dryer harder muscle look. And the best part about it is you keep about 80% off lean muscle gains overall a win win. I would highly recommend this product.

  6. Tony Hickey

    For those that can’t be arsed to read my whole review I’ll get to the point …. these products work ! I was sceptical but took a chance and glad I did . So here’s my review for those who have read on .

    My stats :
    Age 44 ( nearly 45)
    Height 5ft 6
    Weight 13st 4lbs
    BF unsure , guessing around 19 %

    So I went for Mutagenic Labz Ostagainz and Amalgamation for weeks 1-4 then Mutagenic Labz Symbiote and Amalgamation weeks 5-8 .

    In the past I’ve tried most things , natural test boosters , pro hormones and synthetics so to be honest I wasn’t expecting too much from these but how wrong was I . Now these have been unusual times , gyms closed so I adapted my training to home exercise with very limited weights and took this time to try and shed some fat by doing HIT training rather than hardcore weights . The purpose of my stack was to preserve my muscle while dieting .
    After week 1 I started to feel the difference , nothing drastic but just feeling good while hitting the cardio . As the weeks progressed the results were impressive, the change in body shape is noticeable, not just to me but to other people , the weight loss wasn’t dramatic or fast but the recomposition of body shape was as good as any course I’ve done in the past , it sounds a bit vain I guess but even I’m impressed with myself . At my age changing body shape , loosing fat and gaining muscle has become harder than ever , but these products did the business ! The pump near the end of the cycle has almost become painful and the definition I now have is as good as it’s been for many years, it’s hard to describe but I kind of feel I could train for hours . Yes I tired during each set but after a short rest I could go again and again , I just didn’t seem to fatigue .
    With regards side effects I’ll be honest , there were next to none ! At week 5 when I switched to Symbiote I did start to feel nauseous but I persevered and after a week or so it past . I have experienced some hair lose , not noticeable but you can see hair after I drain the bath having just washed it , Is this the result of the hormone imbalance from the SARMS or is it just a natural lose due to the fact lockdown has given me a haircut like Bigfoot , roll on the barbers opening up again ! No big issues , no acne and no headaches
    So where have I ended up :

    Age still 44
    Height still 5ft 6
    Weight 12st 7lb
    BF unsure , guessing around 12%

    I can’t wait to hit my next cycle , I went easy on this one to test the water and get a feel for the products , next time I’m going to clean bulk and can’t wait to see what can be done .
    To sum up , if you’re thinking of trying SARMS , do it ! Yes you need to train , yes you need to eat right but it’s worth it …. the results will make you smile !

    I should also mention the delivery speed from this store is impressive… I’ve ordered twice and will order again !

    5 star positive review all round !

  7. ilya_efremov88

    The delivery was quick. The product looks legit.

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