Ostarine, also known as MK-2886, is a SARM that offers various benefits to those who consume it, including the SARM standards such as a boost to muscle growth, muscle tissue, bone density and strength, and other benefits. Much like other SARMs, a large dose or a long cycle can cause testosterone suppression. Your bodies become convinced that they no longer need to produce the hormone, so they stop: naturally.
You need to have them restart. To restart your testosterone, you’d need to go through PCT.
But yes, Ostarine does have a chance of causing testosterone suppression in a male: especially if you’re taking a large dose or a longer-than-normal cycle time. Don’t do that. Go by what the instructions that you’re given list for you to use.