Is Cardarine Safe To Take (GW 501516) | How To Avoid Side Effects

In this article, we will go over Cardine, also called GW 50156, and answer the question: “is Cardarine safe”. We will go over all the risks of using this compound, what the studies say, why was GW 50156 discontinued and more. By the end of the article, you will have a good idea of how safe this compound is and how you should use it to guarantee a 100% safety.

We will only focus on how safe Cardarine is in this article, if you want more information about this compound, read our in-depth guide about GW 50156.

Safety results from studies

Cardarine (GW 50156) has no side effects that could make it unsafe other than cancer that is widely debated. Let’s go over that and explain how safe is Cardarine considered by studies.

When it comes to safety, there are two studies that we have to keep in mind. The first study is the reason why GW 50156 was discontinued. It showed signs of cancer growth in rats (we will talk more about this later in the article).

The second study is a bit more recent (3 years old). It actually proved that GW 50156 doesn’t cause cancer growth at all at normal dosages for normal cycle length. Not only that, but it also fights off cancer.

The reason for this contradiction between these two studies is the outrageous dosages and cycle length used on rats in the first study. Let’s go over that in more detail, but first, let’s summarize if GW 50156 is safe considered by studies.

To summarize, Cardarine ( GW 50156) is considered safe by the most recent studies that revealed that the bad results from previous studies were due to the enormous dosages and very long cycle length. A recent study concluded that Cardarine doesn’t cause cancer and actually fights cancer cells off.

Now let’s explain why this compound was discontinued and how the most recent study revealed that it’s actually a safe compound…

Why was Cardarine discontinued – Cancer

The reason that Cardarine (GW 50156) was discontinued was a study that found out that it promoted cancer development in rats.

A lot of people are sceptical about this study and there is a big debate on this. The reason for the scepticism is because the dosages and the cycle length used in the study was outrageous.

The dosage used in that study was literally 50x the recommended dosage. Not only that, but they were also giving these dosages to the rats for 2 years straight. That is an insanely long cycle length that nobody would ever do. So the rats in the study were taking 50x the recommended dosage a day and they needed almost two years to develop cancer.

You should ask yourself: Will I use Cardarine at 10x the recommended dosage for over a year straight? 

If you say no, you don’t have to worry because it won’t actually cause side effects. This recent study even showed that GW 50156 at normal dosages for normal cycle length not only DOESN’T cause cancer or tumour growth but it also prevents it.

You can read more about the correlation of Cardarine (GW 50156) and Cancer in our in-depth article about GW 50156.

How to make sure a Cardarine cycle is safe

Now that we have covered the studies results on GW 50156. If we keep that in mind, there are three points that we should follow when we are going on a Cardarine cycle.

Follow these three points and your GW 50156 will be safe and without any side effects.

  • Take normal dosages
  • Stay on a normal cycle length
  • Buy high-quality, pure Cardarine

The first and the second point are exactly what the recent study (the one we talked about earlier in the article) was about. If you keep your dosages normal (up to 30mg a day) and cycle length normal as well (up to 8 weeks) you won’t see any side effects. Especially not cancer, in fact, dosages and cycle length like this, help to fight against cancer.

The last point on the list, buying a high-quality, pure Cardarine is also very important. Some companies sell bunk products that have other substances in them other than GW 50156. This obviously reduces the effectiveness of the compound and can cause unnecessary side effects. That is why I always recommend that you buy pure, high-quality compounds. You can read our article on where to buy SARMs, there we list the best place to buy Cardarine and other compounds

Now let’s go over some Cardarine cycle examples that are completely safe. In fact, similar cycles were tested in the recent study that found out that GW 50156 doesn’t cause cancer.

Safe Cardarine cycle example

Now that we have covered the safety of this compound, let’s go over two example cycles. These Cardarine cycle examples are 100% safe, backed by research that we talked about at the beginning of the article. You won’t get any side effects from them.

Cycle #1 Cardarine

This is an example of a Cardarine (GW 50156) only cycle. You will be able to get the great benefits of this compound: fat loss, endurance increase and increased cardiovascular health. The best thing about this example is, it’s 100% safe and is actually very similar to the cycle they tested in the recent study that proved that GW 50156 doesn’t cause cancer and actually even fights it off.

WeekGW 50156
1-815mg a day

Cycle #2 Cardarine + Ostarine

This is an example cycle for people that want to stack Cardarine with a SARM (Selective Androgenic Receptor Modulator). In this example, Cardarine is stacked with Ostarine. This is a great cycle, Ostarine is really well researched and will allow you to build muscle while you lose fat with the help of GW 50156. Another great thing about this is that you won’t need a PCT (Post Cycle Therapy) for a cycle like this. Ostarine isn’t that suppressive, especially not at normal dosages like in this example, so you won’t need to do a PCT

WeekGW 50156OstarinePCT
1-815mg a day10mg a day/

Is Cardarine safe – The final verdict

So let’s summarize everything and do a quick summary. Is Cardarine (GW 50156) safe?

Yes, it absolutely is, but it can also be dangerous. If you use normal dosages for normal cycle length, it will be safe. Stick to normal dosages (up to 30mg a day) and normal cycle length (up to 8 weeks) and you will be safe. You don’t have to worry about side effects at this dosage and length, especially not cancer. A recent study proved that dosages and length like this are safe and actually fight off cancer cells, not promote their growth.

To summarize, yes, Cardarine is safe, as long as you are not going over the recommended dosages (up to 30mg a day) or over the recommended cycle length (8-weeks).


In conclusion, Cardarine (GW 50156) is a safe compound as confirmed by this recent study. The study that resulted in the discontinuation of Cardarine used 50x the normal dosage on rats for a period of 2 years. Obviously, this is very outrageous. So ask yourself if you will use huge dosages for absurd periods of time. If you won’t, you can safely cycle GW 50156 without any problems.

Remember, use normal dosages (up to 30mg a day) for normal cycle length (up to 8-weeks). If you do this, you will be safe and won’t experience any side effects, especially not cancer. A recent study revealed that dosages and length won’t cause cancer and will actually fight off cancer cells.

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