The Claim
Vitamin D3 supplementation at 60,000 IU weekly for 12 weeks in adults with prediabetes and hypovitaminosis D leads to a modest but statistically significant reduction in fasting glucose levels, with no significant effect on postprandial glucose, HbA1c, or body weight.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In adults with prediabetes and low vitamin D levels, taking 60,000 IU of vitamin D3 weekly for 12 weeks reduces fasting glucose levels without changing postprandial glucose, HbA1c, or body weight.
See the scientific wording
Vitamin D3 supplementation at 60,000 IU weekly for 12 weeks in adults with prediabetes and hypovitaminosis D leads to a modest but statistically significant reduction in fasting glucose levels, with no significant effect on postprandial glucose, HbA1c, or body weight.
High doses of vitamin D3 raise levels of its active form in the body, which binds to a receptor in muscle and fat cells, turning on the gene that makes more insulin receptors. More receptors allow insulin to work better, so the cells take in more glucose from the blood, lowering fasting glucose levels.
What the research says
1 studyTaking a high dose of vitamin D for three months slightly lowered fasting blood sugar in people with prediabetes and low vitamin D, but didn’t change their sugar levels after eating, their HbA1c, or their weight — just like the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.