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 E and Vitamin K. Vitamin E and vitamin K are fat-soluble vitamins, which means they're stored in the body. Over-consumption of vitamin E may lead to toxicity, so you shouldn't have more than 1,000 milligrams a day. Vitamin K toxicity is rare and an upper intake hasn't been established.