Vitamin D3 overloads their neural systems because they are nocturnal creatures. Natively they metabolize vitamin D2 from fungus-infected food, being garbage-scavengers, and they use it to maintain their body health the same way diurnal creatures create and use D3.

D2 was discovered shortly before D3 because they were doing their first experiments on rats in the lab, and so they actually put it into human supplements. They found that when they did not put it in the food, the rats got osteoperosis.

D3 came shortly after, and it is about 2/3 more effective in humans. D2 can also toxify the liver, being a fungal product, at high levels.

D3 added to milk has the added benefit of killing rats when they drink the milk, but the levels in a whole gallon of milk are ten times too low to have any deleterious effect on humans, given that their native equitorial daily skin production is 4,000-7,000 iu/ 100-175 mcg a day from a health individual.

Since D3 activates cellular activity, it will create pain in people without the right nutrient support for eliminating foreign bodies and toxins. Fx, an osteoperosis patient with joint wasting disease, rhumetoid arthritis, may feel only pain because her other glutathion-producing needs are not being met adequately for her body to move the toxins out, and she does not swallow a binding agent like calcium bentonte to grab them at the source.