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.
High dose vitamin E death warning. High doses can be harmful. Elderly people could be risking their lives if they take even moderately high doses of vitamin E, evidence suggests. The latest study by Johns Hopkins University found people who took even half of the recommended current maximum dose had an increased risk of death.