Some experts say that a fact is common knowledge if it can be found in three independent sources. Purdueâs Online Writing Lab recommends finding five independent sources before considering a fact common knowledge. The point is that common knowledge can be found in a variety of sources.
VITAMIN D. Vitamin D and vitamin A are the most toxic of the fat-soluble vitamins. The symptoms of vitamin D toxicity are nausea, vomiting, pain in the joints, and loss of appetite. The patient may experience constipation alternating with diarrhea, or have tingling sensations in the mouth.
Vitamin D Toxicity in Children: A Rare But Preventable Problem. Research over the last decade has shown that vitamin D has wide-ranging, beneficial effects, from improving bone health to reducing cardiovascular disease. But too much can also be toxic, especially for children. Although vitamin D toxicity is very rare, intoxication still happens in children, said Dr. Maria Vogiatzi, an associate professor of clinical pediatrics at Weill Cornell Medical College. Many children receive high doses of vitamin D supplementation, either over the counter or by prescription.