First, vitamin D supplementation in the sun can prevent diabetes?
A recent study published in the Annals of Internal Medicine, a top journal with an impact factor of 51.598 (higher impact factors means higher value of the study), concluded that adult patients with prediabetes who consumed higher doses of vitamin D (20,000 IU of vitamin D3 per week, 4,000 IU of vitamin D3 per day, or 0.75 mcg of idecalcidol per day, a vitamin D analogue) had a 15% lower risk of developing type 2 diabetes.
Oh? So can I prevent diabetes by supplementing with vitamin D in the sun?
Such an effect is not achieved!
In the article, the risk of diabetes is reduced by 15%, and the dose of vitamin D3 eats 10 vitamin D preparations that we routinely see as shown below, which is too large!
The article also points out its own limitations: the study of people with prediabetes is not applicable to the general population. Trials may not be supported by safety results.
Because vitamin D is a fat-soluble vitamin, it is difficult to excrete from the body, and excessive intake will increase blood calcium levels, which will increase the risk of kidney stones and arrhythmias in the long term.
However, the way to supplement vitamin D in the sun is still very safe and will not cause vitamin D excess (but pay attention to appropriate, do not sunburn or expose yourself to heat stroke). Just the amount of vitamin D obtained is certainly not up to the dose level in the experiment.
Is it necessary to prevent or treat diabetes through vitamin D supplementation?
Second, take a look at the "Chinese Diabetes Medical Nutrition Treatment Guidelines (2022 Edition)" what to say?
1. Chinese guidelines for the medical nutrition treatment of diabetes are weak recommendations for vitamin D supplementation to prevent diabetes or lower blood sugar (the benefits and harms are uncertain or the evidence shows that the benefits and harms are comparable regardless of the quality), and the evidence level is C (low). Routine vitamin D supplementation for glucose-lowering purposes is not recommended.
Routine vitamin D supplementation is not recommended for hypoglycemia
2. For children and adolescents with type 1 diabetes, it is recommended to routinely monitor vitamin D and supplement it in time.
Routine monitoring of vitamin D and timely supplementation of vitamin D is recommended in children and adolescents with type 1 diabetes
3. Patients with type 2 diabetes mellitus are recommended to regularly monitor vitamin D levels after metabolic surgery (generally including sleeve gastrectomy, gastric bypass and other surgical methods) and preventive supplementation.
Third, do you want to make up for it?
Vitamin D supplementation through diet or "sunbathing" generally does not cause excessive poisoning, and it is recommended to supplement vitamin D by adjusting the diet and receiving light appropriately.
If you are considering supplementation with medications, it is recommended to monitor yourself for deficiency. Generally, you can look at the "serum 25-OHD" indicator in the blood test. And supplement under the guidance of a doctor or pharmacist.
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