Since I am taking this class, I’ll relay some information from it as I go along.
Anyways, the most common deficienies are:
Iron, zinc, protien, b-vitamins (especially in vegan diets), calcium, and vitamin D if you don’t get enough sunlight.
You can get these from food easily. Unless you don’t eat meat, in which case you will need to take supplements.
Most of these are for developing muscles, red blood cells, strong bones, and nervous system. Although to be frank, I would be wary of taking vitamin b if you are at risk for psychosis. Vitamin B is a precursor to dopamine. And the issue isn’t really amount of vitamin b, but how much is absorbed in digestion.