Vitamin D is an essential nutrient that your body synthesizes naturally when your skin absorbs sunlight. Your body needs vitamin D to absorb calcium from food. Furthermore, vitamin D is involved in production of a number of hormones. Recent studies have elucidated the role of vitamin D in a number of body processes. For people who have a higher risk of vitamin D deficiency because of insufficient exposure to sunlight, increased intake of vitamin D rich foods helps in meeting the body’s demand for this essential nutrient. However, there are a small number of dietary sources of vitamin D, which necessitates intake of vitamin D supplements. Although vitamin D is considered safe when taken in recommended amounts, excess vitamin D intake for prolonged period can cause serious side effects.
Vitamin D boosts the calcium level in the blood. While your kidneys filter the blood, the excess calcium deposits in the kidneys and over time form stones. The risk of developing calcium stones in the kidneys is especially higher in people suffering from sarcoidosis, a type of inflammatory disease that affects multiple organs.
Bone And Muscle Pain
Bone pain is a common side effect of overuse of vitamin D supplement. Excessive vitamin D leaches calcium from your bones, which weakens the bones and triggers bone pain. Calcium also plays a vital role in maintaining your muscle functions. Excess consumption of vitamin D supplement for a prolonged period causes calcium to leak from the muscles, which causes muscle pain.
Too much vitamin D intake raises the calcium level in the blood, which forces your kidneys to overwork to get rid of the excess calcium from the body. It increases the frequency of urination. Too much loss of water through urine increases thirst.
Overuse of vitamin D supplement causes nausea, vomiting, loss of appetite and diarrhea or constipation. High calcium level in the blood following excess vitamin D ingestion impairs the normal function of the digestive system, leading to digestion disorders. Over time this leads to unintended weight loss.
Too much vitamin D intake also affects your brain function. It causes confusion. Mental fatigue is a common side effect of vitamin D overuse.