Source: Health Day (Summary by NIM)
B vitamins are important for the metabolism of many nutrients, including fats, proteins and carbohydrates as well as for the proper formation of DNA and healthy cells. So when researchers gave high doses of B vitamins to a particular group of diabetic patients, they thought that this would be beneficial to them. Turns out they found just the opposite of what they expected.
In the study, diabetic patients with poor kidney functioning were given high doses of B vitamins, which ended up making their health worse. The researchers believe that this is due in part to the fact that B vitamins are water soluble, and high doses may accumulate in the kidneys, worsening their ability to function. The patients taking the B vitamins also had twice as many incidents of heart disease and stroke versus those taking placebo.
Before you stop taking your B vitamins, be aware that these dangers have only been found to exist in individuals with poor kidney functioning. If you are healthy, there should be no such problem. Also, be sure to speak with a nutritionist, dietitian or doctor before start or stop taking any nutritional supplements.
Find out more about this study by reading the article called "High-Dose Vitamin B Risky for Diabetics With Kidney Disease"