A study published in The European Journal of Medical Sciences found that large doses of vitamin D improved insulin sensitivity and led to a positive trend in HbA1c levels.
Type 2 diabetes (T2D) makes up 90% of diabetes cases. In 2010, it was estimated that there were 285 million people with T2D globally.
People with T2D have poor insulin sensitivity, which means that their cells are less responsive to insulin. Insulin transports glucose into cells, and poor insulin sensitivity means insulin isn’t transporting glucose effectively, which leads to abnormally high blood glucose levels. Glucose is dangerous when it is circulating in the blood in high levels for too long. Chronically high blood glucose levels can increase the risk of cardiovascular disease.