Gorilla Mind - Sigma (tongkat Ali and fadogia agrestis)

I just bought a bottle to start Sigma. Are there any long term studies with using tongkat Ali and fadogia agrestis?

When / if you stop, do you need a PCT?

I'm 40yr Old, just got blood work and total T is 504, free T is 85, I'm looking to increase and will get more blood work at the 4-6 month range.

This is a precursor to TRT for me, so i can see myself taking this for 1-3 years possibly, if I can stay within the 500 level of Test range. But if I don't get a good response or no increase in test levels, i will probably stop and eventually get to TRT.

Gyno is a concern when getting on then getting off?

My thought is to take 2 capsules a day, not the 4 capsules dosage due the potential toxicity.

I already do all the things to increase testosterone naturally. Sleep, eat healthy, don't drink....etc. i can improve on the sleep , but am very consistent with my daily routine, train hard 5 days a week . At 40 things are getting harder and drive is slowing down.