Teams could either buy that engine, build their own copy of it, or use their current engines, restricted to ensure no performance benefit.

BBC: Cost-cutting plan agreed for F1

"We know low levels may impact muscle strength and bone turnover, but if an athlete has adequate levels there is no evidence of an enhanced benefit to performance, so natural talent and athletic ability is more likely, " Stevenson told CNN.

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But last year researchers at the University of Georgia found no benefit from the supplement in 30 healthy volunteers tested on seven different performance measures. (The study was funded by Coca-Cola, which apparently was thinking of launching its own quercetin supplement.) Lead researcher Kirk Cureton has tested 60 more patients since then, with the same null result.

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