Vitamin D has been a hot topic over the past few years. Some recent studies have suggested lower levels of vitamin D are linked to greater risks for heart attack, stroke, heart failure, and mortality due to cardiovascular disease (CVD). It seemed completely reasonable that supplementing vitamin D to lower these risks. While this may be true in patients with chronic kidney disease, it seems that there is more to it than this.

We all know the benefits of Vitamin in bone health and strong teeth. Vitamin D, however, does not prevent type 2 diabetes. While Vitamin D does not prevent cancer, it can prolong the life of those who have cancer. Because sunlight is the main source of vitamin, the cancer preventing benefit of sunscreen does not diminish the production of Vitamin D in the skin.

Can excessive Vitamin D supplementation lead to toxicity? The answer is yes. Vitamin D is necessary in the metabolism of calcium. When excessive supplementation leads to super normal levels, high calcium levels (hypercalcemia) can develop and lead to acute kidney injury, lethargy, constipation, muscle weakness, excessive urination, headache and confusion, and even comatose state.

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