Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
Supplementing with quercetin or red onion forces the body into giving muscle preferential treatment over fat
The first HF group of test animals received nothing else, the second and third groups received HF food in which the researchers had added quercetin [HF + Q] or a red onion extract [HF + RO]. That extract consists mainly of quercetin analogues.
If the mice in the HF + Q group had been adult humans, they would have been given about 10 milligrams of quercetin per day. The mice in the HF + RO group received a similar amount of quercetin analogues.
Quercetin in onions
Onions are a good source of quercetin and quercetin analogues. An average standard onion of 80 grams contains a total of about 36 milligrams of quercetin. In addition, the quercetin analogues in onions, 3,4'-O-quercetin glucoside and 4'-O-quercetin glucoside, are relatively well absorbed.
When you fry onions, the total amount of quercetin in the onions does not decrease. According to some studies, it even increases a little. [Journal of Food Composition and Analysis. 2015;18(6):571-81.]
The onion variety with the highest concentration of quercetin analogues is red onions. [Acta Alimentaria. 2015;44(3):383-9.] Therefore, the researchers used an extract of red onion.
Supplementation improved insulin sensitivity, the researchers further discovered.
You can see below how all this is possible. Quercetin and red onion increase the amount of mitochondria in the muscle cells. This means that the muscle cells can convert more nutrients into energy.
"The benefits of purified quercetin aglycone or red onion supplementation may be partially due to increases in skeletal muscle mitochondrial number which improve fat metabolism in a manner that limits mitochondrial lipid overload, and these changes may occur through differential regulation of mtDNA-encoded gene expression."
"The ability of quercetin or red onion not only to prevent obesity or insulin resistance but also to reverse these metabolic derangements should be further explored in future studies."