Toxicity Symptoms for vitamin D

What are toxicity symptoms for vitamin D?

Excessive intake of vitamin D can be toxic, and toxicity of vitamin D can come from either its plant-based (D2) or animal-based (D3) form. Symptoms of toxicity include loss of appetite, nausea, vomiting, high blood pressure, kidney malfunction, and failure to thrive. However, it is also important to note that vitamin D deficiency poses a far greater risk to the vast majority of individuals than vitamin D toxicity and that vitamin D toxicity from food intake is extremely unlikely. Less than one-third of all persons in the U.S. meet the Dietary Reference Intake level for vitamin D, and are far from consuming anything close to potentially toxic levels.

Impact of Cooking, Storage and Processing affect vitamin D

How do cooking, storage, or processing affect vitamin D?

Since cow�s milk-containing foods are an important source of vitamin D in the United States, and since most dairy products are not only fortified with vitamin D but also pasteurized prior to retail sale, there is good research data on the stability of vitamin D under different heating and storage conditions. Researchers have found virtually no loss of vitamin D following pasteurization of processed cheese under normal commercial conditions. They have also found a vitamin D loss of about 25-30% when cheese is exposed to an oven temperature of 450�F (232�C) for approximately 5 minutes.

Factors that Affect Function deficiency of vitamin D

What factors might contribute to a deficiency of vitamin D?

Insufficient sun exposure

By far the most important D-deficiency contributing factor faced worldwide is insufficient exposure to sunlight. More specifically, it is ultraviolet B sunlight in the range of 290-300nm that is needed to convert 7-dehydrocholesterol found in our skin cells into cholecalciferol (the preliminary form of vitamin D3).

Drug-Nutrient Interactions

What medications affect vitamin D?

The following medications impact the absorption, utilization, and/or activation of vitamin D:

• Anticonvulsant medications, including Dilantin, are used to control seizure activity in people with epilepsy and brain cancer, and those who have suffered head trauma through injury or stroke. These medications decrease the activity of vitamin D.
• Bile acid sequestrants (Cholestyramine, Colestipol) are a class of drugs used to lower cholesterol levels. These drugs may reduce the intestinal absorption of the fat-soluble nutrients, including vitamins A, D, E, and K.
• Cimetidine (Tagamet and Tagamet HB) prevents the release of hydrochloric acid into the stomach and is used to treat the symptoms associated with stomach and duodenal ulcers and acid reflux. This drug may reduce vitamin D activation by the liver.

Nutrient Interactions

How do other nutrients interact with vitamin D?

Vitamin D plays a role in maintaining normal blood levels of calcium. As a result, vitamin D impacts the absorption and storage of calcium. Vitamin D also stimulates the absorption of phosphorus.

Vitamin D helps to regulate the production of certain calcium-binding proteins that function in the bones and kidneys. Because these binding proteins are also dependent on vitamin K, interrelationships between vitamin D and vitamin K have become the subject of active research investigation.

Food Sources vitamin

What foods provide vitamin D?

Excellent sources of vitamin D include salmon and sardines while very good sources include vitamin-D fortified milk.

Good food sources of vitamin D include goat's milk, shiitake mushrooms, and eggs.

Introduction to Nutrient Rating System Chart

In order to better help you identify foods that feature a high concentration of nutrients for the calories they contain, we created a Food Rating System. This system allows us to highlight the foods that are especially rich in particular nutrients.