Obese teenagers who take extra vitamin D pills might experience an increase in their fat-storing triglyceride and cholesterol levels. This has been discovered by Seema Kumar, an Indian American researcher. During the study, Kumar, who is a pediatric endocrinologist at the Mayo Clinic Children’s Center, has also come to know that taking additional vitamin D supplements doesn’t help in reducing diabetes risk or improving heart health.

Providers and parents often make obese teenagers consume much more vitamin D supplements than the recommended dose. Reports suggest that often these adolescent children end up consuming five to ten times more vitamin D supplements than the recommended daily dose.

Kumar pointed out that after consuming extra vitamin D supplements for three months, teenagers taking part in the study didn’t show any change in their waistline, body mass index, body weight, blood flow or blood pressure.

Kumar further said that she and her co-researchers are not claiming that there’s no link between chronic diseases in children and vitamin D deficiency. She said that what they are trying to say is: they haven’t identified any such link yet.

The study we are discussing here is the first study by Kumar to report increase in levels of triglycerides and cholesterol during supplementation of vitamin D. It has been ten years since the time she started studying effects of this supplementation in children. So far, she has conducted four clinical trials and published a total of six studies on this subject.

To date, Kumar and her team have managed to discover very limited benefits of vitamin D supplementation for teenagers. However, before drawing a final conclusion, she wants larger placebo-controlled studies to be carried out for examining long-term effects of this supplementation on adolescent children.

According to Kumar, further research on this subject is necessary because some previous studies have identified a link between vitamin D in blood and improvement in vascular function.

Must Read: Cholesterol levels in teens can increase after taking Vitamin D pills

For those who are wondering why Kumar decided to carry out the study on overweight teenagers: it’s because this population remains at an increased risk of developing chronic diseases.

Kumar informed that ingesting too much vitamin D may lead to a condition known as hypervitaminosis or vitamin D toxicity. People are suffering from this condition experience symptoms such as kidney complications, vomiting, nausea, and poor appetite.



  1. Most vitamin D pills are made from sheep wool and is fat soluble. Try getting your vitamin D from natural sunshine this summer – use a SunFriend to make sure you get enough but not too much. D from sunlight is water-soluble. Sunshine also gets you outdoors, which is excellent for anyone trying to feel better and live a healthier life.