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Reduce The Effects Of Aging With A Healthy Diet

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New research in human volunteers has shown that molecular changes to our genes, known as epigenetic marks, are driven mainly by aging but are also affected by what we eat.

The study showed that whilst age had the biggest effects on these molecular changes, selenium and vitamin D status reduced the accumulation of epigenetic changes, and high blood folate and obesity increased them. These findings support the idea that healthy aging is affected by what we eat.

Researchers from the Institute of Food Research led by Dr Nigel Belshaw, working with Prof John Mathers and colleagues from Newcastle University, examined the cells lining the gut wall from volunteers attending colonoscopy clinic. The Institute of Food Research is strategically funded the Biotechnology and Biological Sciences Research Council and this study was also funded by the Food Standards Agency.

The study volunteers were free from cancer or inflammatory bowel disease and consumed their usual diet without any supplements. The researchers looked for specific epigenetic modifications of the volunteers’ genes that have been associated with the earliest signs of the onset of bowel cancer — an age-related disease. These epigenetic marks, known as DNA methylation, do not alter the genetic code but affect whether the genes are turned on or off. These methylation marks are transmitted when cells divide, and some have been associated with the development of cancer.

The investigators studied the relationship between the occurrence of these epigenetic marks at genes known to be affected in cancer, and factors including the volunteers’ age, sex, body size and the levels of some nutrients in the volunteers’ blood. The biggest influence on gene methylation was age. This fits with the fact that the biggest risk factor for bowel cancer is age, with risk increasing exponentially over 50 years old.

The findings, published in the journal Aging Cell, showed that men tended to have a higher frequency of these epigenetic changes than women, which is consistent with men being at a greater risk of bowel cancer. Volunteers with higher vitamin D status tended to show lower levels of methylation, and a similar effect was observed for selenium status. Again, this is consistent with the known links between higher vitamin D and selenium and reduced bowel cancer risk.

The B vitamin folate is essential for health, but in this study, high folate status was associated with increased levels of epigenetic changes linked with bowel cancer. These findings are consistent with some epidemiological studies suggesting that excessive folate intakes may increase risk in some people. The results of this study showing an association between folate status and epigenetic changes linked to cancer, together with those from another recent study by Nigel Belshaw’s group showing that, in cells grown in the laboratory, they could be induced by exposure to high levels of folic acid, emphasise the need for further research on optimal folate status in humans. The researchers intend to investigate the mechanism for the effect of folate on DNA methylation in a follow-up study.

Obesity is also a risk factor for bowel cancer. This study found relationships between body size (height, weight and waist circumference) and epigenetic changes. How excess body weight induces these epigenetic changes, and the consequences for gut health, are currently being investigated at IFR and in Newcastle University.

In summary, the results of this study support the hypothesis that aging affects the epigenetic status of some genes and that these effects can be modulated by diet and body fatness.

See full story on sciencedaily.com

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Larry & Oksana Ostrovsky, founders of BeWellBuzz, are Life Upgrade Coaches committed to helping you navigate through the latest natural health and personal development information to a destination of optimal wellness. The goal of this site is to be a catalyst in creating and spreading the Buzz, dispelling dangerous myths, society norms and helping you elevate your spirit, do more, live better, and think deeper one day at a time. We’d like to thank you in advance for not only visiting and arming yourself with great information but also sharing it with family and friends. Check out and subscribe to our YouTube Channel and become a fan of our Facebook Page.  
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