I refer to the pre-clinical SARM called RAD140. It doesn't have the same chemical structure like Ostarine but it is the first SARM measured with an AAS together. The results were that RAD140 together with Testosterone Propionat has a very interesting effect in mice. While the anabolic effects rose the androgenic effects decreased - very interesting for "elder" people (e.g. prostata etc.). Despite Ostarine is not similar with RAD140 we only can speculate about the (side) effects during a TRT. As mentionned above your HTPA is with the TRT also on a lower level an partially shutdown. The liver values will increase and the cholesterole level will increase which is always bad.
Normally the levels of the sexual hormones will decrease (but NOT the free testosterone, this ratio compared to the testosterone level will improve). But this doesn't play a role because of your exogenic intake of Testosterone. They will be on a constante niveau. But calculate with higher estrogenic side effects - while Ostarine has a much higher binding affiniti than testosterone in a first step the Ostarine will "hijack" the receptors. In a second step the Test on the other free receptors. The more receptores there are (the more muscles the more receptors) the more of the 100mg/e7d can dock on the receptors. But this amount of T is more or less naturally therefore you will have more benefits with 100mg per week and Osta together (in comparison to 500mg+Osta or Osta only). Last sentence is just a personal opinion.
But of course: you should do a blood work during the cycle to interact fast if needed. Use TUDCA as a cell protectice substance (not only liver cells, it affects all cells in the body). And always have the colesterol in mind - it's a factor which very much people don't pay attentiom that much.
