What is a PCT
While SARMS have very few or far less noticeable side effects than Steroids, they can still cause slight suppression of testosterone production during use. The PCT Tamoxifen is a SERM (Selective estrogen receptor modulator) that acts on estrogen receptors and signals for the body to increase natural testosterone production again after a cycle of SARMS is complete. This will help in retaining gains and strength off-cycle.
It is recommended that you take a PCT after a SARMS cycle with SARMS such as LGD-4033 or RAD140, especially if your cycle was on a high dose or over a prolonged space of time.
This information has been dumbed down a lot to make it easier to grasp. A more in-depth explanation can be found here: https://en.wikipedia.org/wiki/Selective_androgen_receptor_modulator