S4
S4 (andarine) was the earliest SARM. It was popular in the 2008 Olympics, before SARMs were banned from professional athletics. Users report modest strength and muscle gain, as well as modest fat loss.
S4 seems to work best if you use it alongside other SARMs. It pairs well with MK-2866 and LGD-4033. Both suppress testosterone at higher doses, a side effect S4 can counter. But S4 carries unique side effects that may make it better to skip.
Side effects of S4
The big side effect with S4 is visual abnormality. There have been no official studies on it, but a lot of users report altered color perception and nighttime blindness (trouble seeing in the dark) after taking S4 for a couple weeks, because one of S4’s metabolites binds to receptors in your eyes. When you also consider that S4 is relatively weak, it begins to look less attractive than other SARMs on this list.
How to dose S4
If you do decide to take S4, go for 50 mg daily, split into two 25 mg doses. As with all the other SARMs on this list, take it daily for 4 weeks, and then wait at least 4 weeks before starting another cycle.
