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.
The fat-soluble vitamins are A, D, E, and K. Adequate absorption of these vitamins is dependent on efficient fat intake and absorption. Except for vitamin K, fat-soluble vitamins are not easily excreted from the body, so they can be toxic at excessive levels.The only way to reach toxic levels would be through taking supplements, not through your diet. This is another case when balance is the key, and excessive amounts can cause harm.xcept for vitamin K, fat-soluble vitamins are not easily excreted from the body, so they can be toxic at excessive levels. The only way to reach toxic levels would be through taking supplements, not through your diet. This is another case when balance is the key, and excessive amounts can cause harm.