Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
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14.03.2023 |
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The life extenders in onion peel
You can easily find articles and videos on the web that tell how to dry, grind and use the peels of onions in the kitchen. This information is not only useful for people who use their money sparingly. According to Japanese research, the skins of the onion are also an excellent source of quercetin and its analogues.
Study
Whether that is really the case, we wonder. According to other research, in which more compounds were included, the red onion in particular contains more quercetin analogues than the yellow onion. [Nippon Shokuhin Kagaku Kogaku Kaishi Vol. 43, No. 5, 642-9 (1996).]
Click on the figure for a larger version.
When the Japanese gave nematodes quercetin and the quercetin analogues Q3M and Q3C, they saw that these compounds extended the lifespan of the worms. Especially Q3M - in full: quercetin 3-O-beta-D-glucopyranoside-(4-1)-beta-D-glucopyranoside proved to be an effective life extender. [Figure]
Mechanism
Old-1 becomes active when nematodes are exposed to mild stressors, such as UV light, heat and oxidants. [Curr Biol. 2001 Oct 2;11(19):1517-23.]
Before and at the end of the supplementation period, the researchers used a battery of standard tests to determine the subjects' cognitive abilities.
Conclusion
"Therefore, the extraction of the flavonoids from the peel would help not only in reducing waste but also in recovering useful compounds that could greatly benefit human health," the researchers write.
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