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 C and B-Complex Vitamins. Vitamin C is a water-soluble vitamin which can be toxic at very high levels. Large doses taken without food may cause indigestion. Symptoms of vitamin C toxicity include nausea, diarrhea, increased gas, headache, kidney stones and excess iron uptake.