4-androstarine (Andarine, 4-androsterone)



Frequently bought together

4-androstarine (Andarine, 4-androsterone)
NovoSarm STENABOLIC (SR 9009) 50mg/ml x 30ml
NovoSarm STENABOLIC (SR 9009) 50mg/ml x 30ml
NovoSarm ANADRINE (S4) 100mg/ml x 30ml
NovoSarm ANDARINE (S4) 100mg/ml x 30ml


4-Androsterone, commonly known as, 4-Andro, is a prohormone that converts into hormones. Specifically, 4 andro converts to testosterone. It undergoes a two-step conversion in the body in order to transform in the testosterone hormone, much like 1-Andro.

It is used by bodybuilders and athletes as a strength and muscle mass booster. That, alongside other benefits as:

  • Higher energy levels;
  • Faster recovery;
  • Reduced muscle fatigue;
  • Protein synthesis.

It is often used during “bulking” periods. It increases lean muscle gains and strength. It could be used as a stack, and often that is the case. Other products are used by athletes to further increase their gains over the bulking cycle, much like with 1-Andro. The benefits of 4-Andro is that some of the side effects connected to 1-Andro are not present when using 4-Andro. Otherwise, the products are similar. Expect higher water retention when cycling 4-Andro.

Is Androsterone a steroid?

No, it is not. It has similar effects, but 4-Andro is a prohormone, not a steroid.

Is 4 Andro safe?

As safe as any other product from this group. You should always consult with a professional before starting a cycle with any products at all. And remember to notify your doctor as well.

Does 4 Andro convert to estrogen?

Some of it may transfer into estrogen, testosterone is the metabolic precursor of estrogen and that is expected. This is the reason why you need to run a PCT after a cycle with 4-Androsterone.

Is 4 Andro liver toxic?

4-Andro is not methylated, which means you won’t have to worry about liver toxicity. However, there are other side effects.

Side effects of 4-Andro:

  • Increased water weight;
  • Susceptibility to fat gain;
  • Gynecomastia;
  • Potential acne;
  • Hair loss;
  • Cardiovascular problems.

Those are all side effects that are a result of estrogen conversion. This is the reason why most users stack 4-Androsterone with an estrogen blocker on cycle and after it, with the PCT.


Andarine is a selective androgen receptor modulator, SARM. It is used to fight conditions connected to involuntary weight loss, osteoporosis and others. Athletes and bodybuilders use Andarine in supplements to increase muscle growth and reduce fats in the body.

Also known as S4 and Andarine S4, Andarine is a largely popular SARM that has an anabolic effect, encouraging lean muscle growth. However, it is also used during “cutting cycles” as it helps shred down more weight and body fat. There is no scientific proof of that, but the anecdotal data shared from users is always pointing out weight loss as a result of an S4 cycle.

Is Andarine s4 safe?

Following the recommended dosages and cycle lengths, and indulging in proper PCT after your cycle with S4 will help you use Andarine relatively safely.

Does Andarine suppress testosterone?

Once you are off the cycle your body will need some time to bounce back on its normal testosterone levels. This is a result from cycles with many other products, thus it is necessary for you to get a PCT after the cycle.

What is Andarine used for?
In medicine it is researched as a way to better the condition of patients suffering from serious disease connected with loss of muscle and bone matter. However, the chemicals are also used by athletes and bodybuilders for muscle gains and weight loss.

What does s4 Andarine do?

It connects to an androgen receptor (AR) and mimics the effect of the male hormone testosterone. This results in muscle gains.

How long does Andarine stay in your system?

The half-life of Andarine is four to six hours.

Is Andarine s4 a steroid?

No, Andarine S4 is not a steroid, although it has similar effects. The main difference is that it has a more concentrated effect and far less side effects than a steroid. Andarine is a SARM.

You can find SARMs for sale here. We also have an array of different products that can aid you towards your goals faster. Browse our other products and don’t forget to consult with your doctor before testing them out.