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April 29, 2010: by ResveratrolNews
A human study, conducted among adults in their 20s, shows that a single high-dose of resveratrol (250 or 500 milligram, 99% resveratrol, Biotivia) improves hemoglobin concentrations and delivery of oxygen to the brain, but did not improve “cognitive” (thinking) performance or allay mental fatigue. Researchers believe resveratrol activated nitric oxide gas which dilated (widened) blood vessels in the brain. The design and conclusions of study, conducted by British researchers, are brought into question because resveratrol is a copper chelator (key-lay-tor) and may over long-term use actually reduce hemoglobin levels and produce symptoms of fatigue and anemia. The higher (500 mg) dose used in this study was also shown in a prior animal experiment to slightly shorten lifespan. – Resveratrol News April 29, 2010
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