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Can Too Much Vitamin D Be Toxic

More and more Americans are using vitamin D supplements and there have been some concerns whether too much vitamin D can be toxic. A new study has shown that there aren’t any side effects of taking too much vitamin D.

The researchers analyzed more than 20.000 vitamin D blood tests done in the course of 10 years. The researchers found that only 0.8% had higher vitamin D levels and that vitamin D levels are mostly increased during the study season. People and students reach for vitamin S supplements to help them concentrate and focus more on their studying.


The study shows that people rarely suffer from hypercalcemia that occurs as a result of too much vitamin D. Hypercalcemia or high blood calcium levels can cause vomiting, kidney problems and weakness.

In fact the study has shown that there’s no actual connection of people’s vitamin D levels and blood calcium levels.

“We found that, even in those with high levels of vitamin D over 50 ng/mL, there was not an increased risk of hypercalcemia, or elevated serum calcium, with increasing levels of vitamin D,” explains MD.  Thomas Thacher, a family medicine expert.

There was only one case of vitamin D toxicity. A 51-year old woman had taken 50,000 international units (IU) of vitamin D and calcium supplements every day for 3 months. The doctors discovered that the woman had kidney damage. The recommended limit for vitamin D supplement is 4000 IU per day.