How Vitamin D may support blood sugar control in prediabetes: Study |

Prediabetes, a condition where blood sugar levels are elevated but not yet in the type 2 diabetes range, affects millions worldwide. Managing blood glucose early is crucial to preventing diabetes. A recent study published in the Journal of the Endocrine Society suggests that vitamin D supplementation may help lower blood sugar in people with prediabetes. Analysing 10 clinical trials with nearly 4,500 participants, researchers found that 18.5% of those taking vitamin D reached normal blood sugar levels, compared to 14% in the placebo group. These findings highlight vitamin D’s potential role in blood sugar control and diabetes prevention strategies.

What is Vitamin D and how might it affect blood sugar

Vitamin D, often referred to as the “sunshine vitamin”, is a fat‑soluble micronutrient essential for a wide range of physiological functions. It plays a vital role in bone health, calcium absorption, immune support, and metabolic regulation. The body naturally synthesises vitamin D when the skin is exposed to sunlight, but it can also be obtained through dietary sources such as oily fish, fortified foods, and supplements, particularly important in countries like the UK, where sunlight is limited for much of the year.

Emerging research highlights vitamin D’s role in blood sugar control and insulin sensitivity. According to reports, vitamin D supplementation showed promising results in improving blood sugar levels in people with prediabetes, with a notable portion reverting to normal glucose levels compared to those given a placebo.Vitamin D receptors are present in the pancreas, muscle, and adipose (fat) tissue, suggesting a direct link between vitamin D levels and glucose metabolism. Adequate vitamin D may:

A deficiency in vitamin D has been linked to increased insulin resistance, elevated fasting glucose, and a higher risk of developing type 2 diabetes, especially in individuals already at risk due to prediabetes or obesity.

People who might benefit most from Vitamin D for blood sugar support

People with darker skin, those living in northern climates like the UK, individuals who are overweight or obese, and anyone with limited sun exposure are more prone to vitamin D deficiency. These groups may benefit most from supplementation, particularly when managing blood sugar levels or reducing the risk of progressing from prediabetes to type 2 diabetes. Vitamin D may help improve insulin sensitivity and glucose metabolism in these at-risk populations.

How much Vitamin D is recommended

According to the NHS, adults and children over the age of 1 should consider taking a daily supplement containing 10 micrograms (400 IU) of vitamin D, particularly during the autumn and winter months when sunlight exposure in the UK is limited. This helps maintain healthy bones, muscles, and immune function. A simple blood test can help determine your vitamin D levels and guide appropriate supplementation.

FAQs

Q1: Can vitamin D cure diabetes?No, vitamin D is not a cure for diabetes, but it may help regulate blood sugar levels in individuals with prediabetes.Q2: How long does it take for vitamin D to affect blood sugar?Some studies suggest noticeable effects after a few months of consistent supplementation, but this can vary between individuals.Q3: Should everyone with prediabetes take a vitamin D supplement?Not necessarily. It’s essential to check your vitamin D levels first and consult with your doctor for personalized advice.Disclaimer: This article is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult your healthcare provider before starting any new supplement regimen or making significant changes to your diet or lifestyle.Also read | Silent symptoms of high cholesterol: Pain in these areas could signal danger