Vitamin D has many important health benefits, and drinking vitamin D fortified milk is an easy way to help meet your needs. This article reviews why most milk has added vitamin D and why that The primary function of vitamin D is to help the body absorb calcium and phosphate, thus keeping muscles and teeth healthy and bones strong and less likely to break. However, vitamin D is also Treatment with a magnesium supplement led to an increase in vitamin D levels in people who had low levels initially, but it reduced levels of the sunshine vitamin in those with high levels. This Vitamin D absorption occurs in the ileum and jejunum. It has been estimated that 75% is effectively absorbed but efficiency is dependent on bile salt and micelle formation and, therefore, the presence of malabsorptive disorders such as Coeliac or Crohn’s disease can significantly affect absorption and thus status . Eating vitamin C helps your body to absorb iron, which reduces the chances of you developing anemia and an enlarged spleen. Vitamin C is also an antioxidant, which means it is a nutrient that combats damage from free radicals. All fruits and vegetables have some vitamin C. Citrus fruits and juices are good sources. Vitamin D . Vitamin-D toxicity, although rare, can occur in individuals taking large doses of vitamin-D supplements with a heavy intake of fortified foods. The majority of symptoms of hypervitaminosis D stem from hypercalcemia caused by excessive calcium absorption in the duodenum and distal convoluted tubule. Some factors that may reduce or block its absorption include: Conditions such as celiac disease, chronic pancreatitis, Crohn's disease, and cystic fibrosis. These can all affect the intestines, preventing them from absorbing vitamin D found in food. BMI ( body mass index) higher than 30. Vitamin C is the only nutrient that has been shown to increase the absorption of iron, according to a November 2020 trial in ‌JAMA‌. "Iron supplements and plant-based food sources of iron are a non-heme form of iron," Volpe says. "Vitamin C helps to convert this to heme iron, which is the only usable form of iron for our body." Vitamin D, first identified as a vitamin early in the 20th century, is now recognized as a prohormone. A unique aspect of vitamin D as a nutrient is that it can be synthesized by the human body through the action of sunlight. These dual sources of vitamin D make it challenging to develop dietary reference intake values. Take vitamin D with a healthy fat. Vitamin D is a fat-soluble vitamin, which means that your body will absorb the nutrient more effectively with a source of fat, Vandenberg explains. In fact, a 2015 study in the Journal of the Academy of Nutrition and Dietetics found that fat helps our bodies absorb vitamin D 32 percent better. GMKXhr.