According to a study, excessive intake of vitamin D and calcium supplements can increase the risk of developing serrated polyps which are the precursors of colorectal cancer. The randomized clinical trials show that symptoms arise much later after the start of supplements. Thus, the findings of this study are very important and will help in taking an informed decision while prescribing or taking such supplements. Overuse of vitamin and nutritional supplements is an increasing problem in recent times.

While deficiency of vitamin D can cause weakness, recurring infections, and fog of the brain, an excess of vitamin D and calcium has a number of harmful effects as well. Vitamin D aids in calcium absorption, but excess of it can lead to metastatic calcification especially in the kidneys. Any dose of vitamin D above 1000 IU/day is risky and any dose greater than 10,000 IU/day can cause…