I have never understood the chemical imbalance theory anyway. Surely there needs to be a cause of a chemical imbalance like an auto-immune illness or something.

I have never understood the chemical imbalance theory anyway. Surely there needs to be a cause of a chemical imbalance like an auto-immune illness or something. Why hasn’t the focus been on the cause? If your ft4 is very high or you have low levels of hgh, there is a cause. What theories to they have for these issues with serotonin?