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Abstract
Phytonutrients reportedly extend the lifespan of C. elegans, Drosophila, and mice. We tested extracts of blueberry, pomegranate, green and black tea, cinnamon, sesame, and French maritime pine bark (Pycnogenol and taxifolin), as well as curcumin, morin, and quercetin for their effects on the lifespan of mice. While many of these phytonutrients reportedly extend the lifespan of model organisms, we found no significant effect on the lifespan of male, F1 hybrid mice, even though the dosages used reportedly produce defined therapeutic endpoints in mice. The compounds were fed beginning at 12 months of age. The control and treatment groups were isocaloric with respect to one another. A 40% calorically restricted and other groups not reported here did experience lifespan extension. Body weights were unchanged relative to controls for all but two supplemented groups, indicating most supplements did not change energy absorption or utilization. Tea extracts with morin decreased weight, while quercetin, taxifolin, and Pycnogenol together increased weight. These changes may be due to altered locomotion or fatty acid biosynthesis. Published reports of murine lifespan extension using curcumin or tea components may have resulted from induced caloric restriction. Together, our results do not support the idea that phytonutrient-antioxidants and anti-inflammatories are potential longevity therapeutics, even though consumption of whole fruits and vegetables is associated with enhanced health- and lifespan.
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Concepts
Caenorhabditis elegans, Nutrition, Medicinal plants, Gerontology, Fruit, Model organism, Calorie restriction, Resveratrol
MeSH headings
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