Vitamin D is often referred to as the “sunshine vitamin” due to its ability to be generated from sunlight exposure or obtained through certain foods like salmon. Research has shown that this essential nutrient plays a crucial role in maintaining immune function, bone health, and heart well-being.
A recent study published in The American Journal of Clinical Nutrition found that long-term vitamin D supplementation may slow the aging process. The study involved over 1,000 people aged 50 and above who took either a daily dose of 2,000 IU or a placebo for four years. The results showed that those taking vitamin D supplements experienced less telomere shortening, which is a measure of biological aging.
Telomeres are the protective caps on chromosomes that shorten as we age, leading to cellular damage and potential health issues. The study’s findings suggest that vitamin D may help preserve telomere length, potentially slowing down biological aging.
While the study’s results are promising, Dr. JoAnn Manson, coauthor of the research, emphasizes the need for further studies to confirm these findings. However, she does note that high-risk groups, such as those over 75 or with osteoporosis, may benefit from vitamin D supplementation.
Manson stresses the importance of getting enough vitamin D through lifestyle choices, such as spending time outdoors and eating foods rich in the nutrient. She warns against excessive use of supplements, citing potential toxicity and adverse side effects. The recommended daily intake of vitamin D is 600 IU for those between 1 and 70 years old, and 800 IU for those over 70.
Overall, the study highlights the significance of vitamin D in maintaining overall health and well-being. By incorporating healthy lifestyle habits and adequate vitamin D supplementation, individuals can take proactive steps to support their health and potentially slow down biological aging.
Source: https://fortune.com/well/2025/05/21/vitamin-d-supplements-biological-clock-aging