Vitamin D supplements may slow the progression of type-2 diabetes in newly diagnosed patients and those with pre-diabetes

This is according to a study published in the European Journal of Endocrinology.

Researchers found that high-dose supplementation of vitamin D can improve glucose metabolism to help prevent the development and progression of diabetes.

The burden of type-2 diabetes

Type-2 diabetes is an increasingly prevalent disease that places a huge burden on patients and society and can lead to serious health problems including nerve damage, blindness and kidney failure.

People at high risk of developing type-2 diabetes (pre-diabetes) can be identified by several risk factors including obesity or a family history of the disease.

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Although low vitamin D levels have previously been associated with an increased risk of developing type-2 diabetes, some studies have reported no improvement in metabolic function.

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Dr Claudia Gagnon and colleagues from Université Laval in Quebec examined the effect of vitamin D supplementation on glucose metabolism in patients newly diagnosed with type-2 diabetes or identified as at high risk of developing the condition.

Markers of insulin function and glucose metabolism were measured before and after six months of high-dose vitamin D supplementation (approximately five to 10 times the recommended dose).

Although only 46% of study participants were determined to have had low vitamin D levels at the start of the study, supplementation with vitamin D significantly improved the action of insulin in muscle tissue of participants after six months.

“The reason we saw improvements in glucose metabolism following vitamin D supplementation in those at high risk of diabetes, or with newly diagnosed diabetes, while other studies failed to demonstrate an effect in people with long-standing type-2 diabetes is unclear,” says Dr Claudia Gagnon. “This could be due to the fact that improvements in metabolic function are harder to detect in those with longer-term disease or that a longer treatment time is needed to see the benefits.”

Follow your doctor’s vitamin D dosage recommendations

Dr Gagnon suggests future studies should evaluate whether there are individual clinical or genetic factors that affect how different people respond to vitamin D supplementation and if the positive effect on metabolism is maintained in the longer term.

“Type-2 diabetes and pre-diabetes are a growing public health concern and although our results are promising, further studies are required to confirm our findings, to identify whether some people may benefit more from this intervention, and to evaluate the safety of high-dose vitamin D supplementation in the long term. Until then I would suggest that current vitamin D supplementation recommendations be followed.”

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Source: European Society of Endocrinology www.sciencedaily.com

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