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New Research Busts Vitamin D Myth

New research confirms that high doses of vitamin D supplements do not reduce the risk of type 2 diabetes in older adults. Despite previous studies suggesting that low vitamin D levels could increase the risk of diabetes, especially in those with prediabetes, this new study finds no benefit from vitamin D supplementation in preventing the condition. The study, led by Finnish researchers, was published in the journal Diabetologia on December 2.

The research followed nearly 2,300 participants aged 60 and older, who were randomly assigned to receive either placebo pills or daily doses of 40 or 80 micrograms of vitamin D3 for five years. The study aimed to determine if high doses of vitamin D could lower the incidence of type 2 diabetes in individuals without prediabetes. At the end of the study period, 105 participants developed type 2 diabetes, with no significant differences in the incidence between the groups receiving vitamin D supplements and the placebo group.

Additionally, the researchers found that high doses of vitamin D had no effect on blood sugar levels, insulin resistance, or measures related to obesity. These results suggest that for healthy individuals with adequate vitamin D levels, increasing their vitamin D intake does not have any impact on the risk of developing type 2 diabetes or its common risk factors.

In conclusion, the study suggests that, for most healthy individuals, supplementing with vitamin D does not provide any protection against type 2 diabetes. For those with already sufficient vitamin D levels, additional supplementation is unlikely to make a difference in diabetes prevention.