Do a test and take a break from high carotene foods...it may make a big difference. If I eat too much carotenes (like a big serving of sweet potatoes or carrots) I will feel extra dumb the next day, I guess you could say brain fog. For vitamin A I eat a lot of butter and also take a supplement of vitamin A extracted from fish liver oil, as retinol from natural animal sources is a lot better for the body and easier to utilize.

Spinach is the most carotenes I eat that doesn't effect me negatively. The thing is detoxification has two phases, carotenes can speed up the first phase but if your second phase can't keep up it can make you feel worse than if you didn't eat as much carotenes.