Well if this is your first cycle people will be anti mast because if you come across sides like hair loss or increase urination then youre not sure if thats from the test or the mast or even the var. If you have done a test cycle before I see nothing wrong with it.
A lot of people dont like mast because they see it as a precontest agent and thus "useless" in a typical cycle. I think that is just parroting. I have seen many logs where people love mast, the hardness it gives, the strength increases, the general feeling it promotes. I have seen people get away with less AI because of it but others still use the same amount..
It is well known to cause pretty notable hair loss in prone individuals. This is another reason why people don't like it.
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