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The Non-Masculinizing Ostarine Guide for Girls & Women

ostarine for girls a comprehensive guide

The majority of information regarding the safe usage of Ostarine is oriented toward men, and for this reason women often follow the same protocols as men and end up with unnecessary side effects.

Most girls interested in female bodybuilding know that Anavar is the most common AAS among female bodybuilders. This is because Anavar unlike most AAS has a very low masculinization risk and yields amazing gains at low doses.

With Ostarine women can come very close to the results of Anavar with a spec of the side effects and ZERO risk of masculinization.

This article is a comprehensive guide based on the current scientific literature and analysis of thousands of anecdotal reports and experiences. You will learn:

  • What is Ostarine
  • Benefits
  • Side Effects
  • Dosing Protocol

What is Ostarine?

Ostarine was one of the first SARMs ever made. It was originally developed to treat muscle wasting conditions and osteoporosis.

To date, it is the most thoroughly researched SARM with many clinical trials backing its efficacy and safety in terms of building lean muscle tissue with minimal side effects.

It stands as the most popular pick for first time users, and in my opinion is the first SARM a female bodybuilder should take if she wants to get her hands dirty with PEDs.

The chemical formula for the SARM Ostarine (MK2866)
Muscle Mass
Side Effects


Muscle Building

Even though it’s considered to be one of the weaker SARMs, Ostarine will lead to a serious increase in muscle and is strong enough to break a natural plateau.

On a small caloric deficit, it can build a modest amount of muscle, and retain all muscle on a bigger deficit.

Strength & Performance

On a caloric surplus, you can expect a significant increase in strength during an Ostarien cycle.

On a deficit, your strength will peak during the first few weeks and plateau as you start losing more weight deeper into your cycle.

Bones & Joints

Ostarine will strengthen and densify your bones. This was one of the reasons it was originally developed, and is proven to be true in clinical studies.

Ostarine is also purported to heal and strengthen joints and tendons. While this is not scientifically proven, heaps of anecdotal reports point out that Ostarine can indeed heal your joints and tendons.

No other SARM is reported to have this property.


Ostarine will speed your recovery times considerably, just like any other SARM or PED that increases MPS.


Ostarine will not cause any water retention, and you will retain any leanness if you’re on a small caloric surplus. It will harden your muscles and give them a dry, hard, and veiny look

Side Effects

Females don’t have to worry about testosterone suppression or any of the other negatives that come with it.

The main worry women have with PEDs is masculinization. On Ostarine you don’t have to worry about masculinization, and should not be concerned about getting a deeper voice, clitoral enlargement or facial hair.

You will mainly face:


Like all SARMs, Ostarine will cause dyslipidemia and increase your LDL while decreasing your HDL.

There is some evidence to suggest that your LDL might decrease during your cycle, but there is also evidence pointing the opposite.

LDL = Bad Cholesterol

HDL = Good Cholesterol

Liver Toxicity

Ostarine is the mildest SARM when it comes to liver toxicity, and is very unlikely to cause a significant or worrisome amount of liver damage from the dosages that are recommended for females.

Change in Menstrual Cycle

The one side effect often reported in females is a change in their menstrual cycles. In some cases, menstruation comes sooner than it should, while in others it happens later than it should.

This side effect is completely temporary and goes away after the Cycle.


Ostarine should be dosed from 5 to 10 mg/day for females and should be taken once a day, ideally at the same time every day.

At 5 mg/day it will cause a boost in strength and performance, as well as a big increase in muscle mass if on a caloric surplus.

On a caloric deficit, it will retain muscle mass and increase vascularity.

At 10 mg/day it will yield a significant improvement in terms of benefits compared to 5 mg/day, with only a mild increase in side effects. 

Ostarine is very well tolerated and effective at these dosages, so do not exceed them.

You do not need to follow a PCT protocol, but a lot of women like to taper off the dose during the last week of their Ostarine cycle (take half of your usual dose).


Ostarine is perhaps one of the safest, if not the safest PED that girls can take to achieve noticeable results in terms of muscle and strength.

It poses zero risk of masculinization, and you should not worry about developing any unwanted side effects as long as you stick to my guidelines. The only side effects you might experience are mild liver toxicity and dyslipidemia.


Fake SARMs are unfortunately very common and can lead to serious side effects. Always make sure the Ostarine you’re getting is legit by shopping from well-known and trusted vendors.

On the trusted sources page you will find the most tried & tested vendors, with up to date 3rd party lab testing (proving quality and purity),  where you can buy the highest quality Ostarine available. (and get sizable discounts of 20% off).

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