A new study has found that vitamin D supplements may help preserve telomeres – the protective “caps” at the end of chromosomes – and thus slow down the biological process of aging.

Telomeres naturally shorten with age, which is associated with an increased risk of age-related diseases and premature mortality. According to a study published in The American Journal of Clinical Nutrition , vitamin D helps slow this shortening, especially in leukocytes (white blood cells).

What did the study show?

The study involved American adults over the age of 50. Participants took supplements of vitamin D3, omega-3 fatty acids, both, or a placebo, for a period of five years.

The results showed that:

- The group that took vitamin D had minimal telomere shortening after 2 and 4 years.

- The placebo group experienced significant telomere shortening.

- Omega-3 had no noticeable effect on telomeres.

- The positive effect of vitamin D was most evident in participants who were not taking cholesterol medications and in those who were not obese.

What do these results mean?

Maintaining telomere length can translate into a slowing of the biological aging process by about 3 years.

Dr. Yoshua Quinones emphasized that this reinforces the role of vitamin D not only in bone health and immunity, but also in preventing cellular aging.

Study limitations

- The study was a secondary analysis and was not originally designed to measure effects on telomeres.

- The sample was predominantly white participants over the age of 50.

- 37% of data was missing after 4 years.

- The effect was only observed in white blood cells and direct clinical consequences were not analyzed.

Dr. David Cutler warns that the potential benefits of vitamin D must be weighed against its risks. Taking too much can lead to kidney damage and toxicity , because it is a vitamin that accumulates in the body.

In conclusion, this study adds to the evidence for the protective role of vitamin D against aging and paves the way for further research into its impact on cellular health. However, more studies with larger and more diverse populations are needed before it can be included in official guidelines.

Caution: Before starting any supplement, consult your doctor – especially if you are taking medication or have a chronic illness.

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_{Source: MedicalNewsToday}