vitamin D can make the intestines absorb too much calcium

Too much vitamin D can make the intestines absorb too much calcium, which can cause high levels of this mineral in the blood. High levels of calcium in the blood can lead, in turn, presented to the mineral deposits in soft tissues like the heart and lungs, which may reduce their ability to function.

May also be kidney stones, vomiting and muscle weakness if you have too much vitamin D.Recommendations
The best way to get the daily requirement of essential vitamins is to eat a balanced diet containing a variety of products from basic food groups.
Vitamin D is also known as the "sunshine vitamin" because the body manufactures exposure to sunlight. A period of 10 to 15 minutes of exposure to sunlight three times a week is enough to produce the body's requirement of vitamin D.
Specific recommendations for each vitamin depend on age, sex and other factors (such as pregnancy). In general, people over age 50 need slightly higher amounts of vitamin D than younger people.