The glow of phosphorus itself originates from oxidation of the white (but not red) phosphorusâ a process now termed chemiluminescence. Together with nitrogen, arsenic, and antimony, phosphorus is classified as a pnictogen. Phosphorus is essential for life. White phosphorus, called WP (slang term Willie Peter) is used in military applications as incendiary bombs, for smoke-screening as smoke pots and smoke bombs, and in tracer ammunition. 2  It is also a part of an obsolete M34 White Phosphorus US hand grenade.
Such failures are inevitable when there is a deficiency of essential nutrients, particularly vitamins D, C, and niacin. There is especially strong evidence for a relationship between vitamin D deficiency and cavities. Dozens of studies were conducted in the 1930's and 1940's [16-27]. More than 90% of the studies concluded that supplementing children with vitamin D prevents cavities.
Vitamin D is soluble and can be stored in the body for many months. Too much vitamin D in the body can cause elevated levels of calcium in the blood. It is called hypercalcaemia. High levels of calcium in the blood can cause constipation. So, the answer to her question is yes, vitamin D can cause constipation. However, taking the supplement at the recommended dose should not cause any problems. You can take up to 1000 IU of vitamin D3 a day without any side effects. If you are vitamin D deficient, your doctor may recommend a higher dose.