Well, it would be important to note what you were running and at what dose when you had these issues. Caber will not increase estrogen levels. It's a dopamine agonist that will reduce prolactin levels that rise while on deca or tren and will help prevent prolactin related gyno. It will NOT do anything to reduce estrogen related gyno. If your E2 levels were too high it was not due to using caber, it was due to NOT using an AI.