A vitamin made when sunlight hits the skin could help slow down the ageing of cells and tissues, say researchers.
A King's College London study of more than 2,000 women found those with higher vitamin D levels showed fewer ageing-related changes in their DNA. However, the American Journal of Clinical Nutrition study stops short of proving cause and effect.
A lack of vitamin D has already been linked to multiple sclerosis and rheumatoid arthritis. The genetic material inside every cell has an inbuilt "clock", which counts down every time the cell reproduces itself.
The shortening of these strands of DNA called telomeres is one way of examining the ageing process at a cellular level.
Source - BBC