Phosphorus is a chemical element with symbol P and atomic number 15. As an element, phosphorus exists in two major formsâ white phosphorus and red phosphorus âbut due to its high reactivity, phosphorus is never found as a free element on Earth.Instead phosphorus-containing minerals are almost always present in their maximally oxidised state, as inorganic phosphate rocks. 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.
This COULD cause an indigestion like experience. So, the BEST choice for a Vitamin D Supplement is one that is made with Vitamin D3 and is prepared either 'Dry' without oil or is prepared with coconut oil (also called MCT or medium chain triglycerides) that doesn't go rancid.
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.