Don’t cycle when body fat is too high.
Now, who determines when someone’s body fat is too high to cycle? Who really knows? Imo, a person should not cycle if their body fat is higher than 12%.
First, high endogenous estrogen levels in men come from high aromatase activity. Aromatase is the enzyme that converts androstenedione and testosterone into estrone and estradiol. Aromatase is found most prevalently in fat cells, hence the more body fat a man has, the more aromatase hence the more estrogen. When a person who has a high levels of endogenous estrogen and adds an exogenous drug that aromatizes, that person is just going to raise his estrogen levels even more and more than likely just get fatter (increase fat cells).
Moreover, excess body fat, will likely cause a spike in estrogen and return lower testosterone levels. Consequently, you are worse off than when you began the cycle because you added fat and lowered your testosterone levels. I noticed this problem is prevalent on these boards. These are the two main reasons estrogen gets out-of-control. There are other factors that contribute to raising estrogen: poor diet, insulin sensitivity (eating too many carbs). I take slin so I have to eat carbs but I recommend you guys to get with RickRock about his carb manipulation tactics because I read some of his ideas and I liked what I read, hence he can help you with controlling estrogen in that manner.