cani use the ordinary vit c on my lips Vitamin Guide Review: minimalist 8% L ascorbic

Learning Objectives Learn about the role of selenium Selenium is a cofactor of enzymes that release active thyroid hormone in cells and therefore low levels can cause similar signs and symptoms as iodine deficiency

10.1111/j.1467-7687.2012.01149.x 423 MorrillR

There are several factors which may contribute to a vitamin D deficiency: Lack of sun exposure to naturally produce vitamin D (use of sunscreen or indoor jobs, environmental pollution) Advanced age, as the ability to naturally synthesize vitamin D decreases Fat absorption disorders such as celiac disease or Crohns disease Melanated skin tones, which decreases the ability to naturally absorb UV rays to produce vitamin D Allergy or intolerance to foods rich in Vitamin D (dairy products and fatty fish) If unable to achieve the recommended daily allowance of vitamin D (600 to 800 international units (IU) for adults) with lifestyle or diet modification alone, you may consider supplementation, which can be taken in pill form or given as an injection

Neurochem Res 8: 231243