Not an ordinary vitamin. Vitamin D is actually a hormone that your body makes, starting when your skin is exposed to the sunâs ultraviolet rays. If youâre in the sun enough, you probably donât need to consume any vitamin D from food or supplements.
Synonym Discussion of PERNICIOUS. pernicious, baneful, noxious, deleterious, detrimental mean exceedingly harmful. pernicious implies irreparable harm done through evil or insidious corrupting or undermining. baneful implies injury through poisoning or destroying.noxious applies to what is both offensive and injurious to the health of a body or mind.xamples of PERNICIOUS. 1  More pernicious still has been the acceptance of the author's controversial ideas by the general public. 2  the pernicious effects of jealousy. 3  She thinks television has a pernicious influence on our children.
Pernicious anemia is a condition caused by too little vitamin B12 in the body. It is one form of vitamin B12 deficiency anemia. Vitamin B12 helps the body make healthy red blood cells and helps keep nerve cells healthy. It is found in animal foods, including meat, fish, eggs, milk, and other dairy products. The most common cause of pernicious anemia is the loss of stomach cells that make intrinsic factor. Intrinsic factor helps the body absorb vitamin B12 in the intestine. The loss of parietal cells may be due to destruction by the body's own immune system.