A Closer Look at How Vitamin D3 May Protect Our DNA
A recent study from the VITAL trial suggests that Vitamin D supplementation may help to slow biologic aging by preserving telomere length. Telomeres are protective caps at the ends of chromosomes that naturally shorten with age and are associated with age-related diseases. In the VITAL sub-study, 1,054 participants were followed for four years; those who took 2,000 IU of vitamin D3 daily showed significantly less telomere shortening compared to those given a placebo—delaying biological aging by the equivalent of nearly three years.
“Our findings suggest that targeted vitamin D supplementation may be a promising strategy to counter a biological aging process, although further research is warranted,” said Haidong Zhu, first author of the report and a molecular geneticist at the Medical College of Georgia, Augusta University.
While omega-3 supplements did not yield similar benefits, vitamin D3 demonstrated potential in reducing inflammation and guarding against chronic diseases. However, limitations in demographic diversity and study design suggest that the findings should be interpreted cautiously. Since many adults have insufficient vitamin D levels due to limited sun exposure and dietary intake, supplementation could be a viable strategy to support healthy aging.
As a clinical nutritionist, I focus on personalized nutrition strategies that support healthy aging. Incorporating vitamin D-rich foods into your diet is a natural way to boost your intake. Fatty fish like salmon, mackerel, and sardines are excellent sources of vitamin D. Additionally, fortified foods such as dairy products and plant-based milks can contribute to your daily intake.
For individuals at risk of deficiency—such as those with limited sun exposure or darker skin tones—supplementation may be necessary. It’s important to have your blood levels checked to determine the appropriate dosage based on individual needs and health status. Regular monitoring of vitamin D levels can help ensure optimal intake and prevent potential adverse effects.
Final Thoughts
A balanced diet rich in nutrients, along with regular physical activity and adequate sleep, forms the foundation of healthy aging. If you’re interested in personalized nutrition guidance to support your health journey, feel free to reach out. Together, we can create a plan tailored to your unique needs and goals.
Sources:
- Valente, Lisa M.S., R.D. (2024). This Underrated Vitamin Could Help Slow Biological Aging, New Study Suggests. EatingWell.
- VITAL Trial, The American Journal of Clinical Nutrition.
Marsha Fenwick, C.N.P. R.R.T.
Marsha is not your typical nutritionist. She began her career 20 years ago as a Registered Respiratory Therapist. Later, she earned her certifications as a Registered Nutritional Consultant Practitioner, Certified Nutritional Practitioner, and Registered Orthomolecular Health Practitioner. Marsha is also a Certified Cancer Coach. Her clinical practice specializes in: sustainable healthy weight loss, digestive health, women's hormones, diabetes, heart health, and cancer prevention and recovery. Contact Marsha today for more information and to book a FREE 15 minute nutritional consultation.
