I have just ordrered 4 package of reservatrol-pills from longevinex and then I read a paper " Resveratrol prolongs lifespan and retards the onset of age-related markers in short lived vertebrate" from Current biology 16, 296-300; Valenzano et.al.2007. He wrote that reservatrol raised the mortality rates of treated fishes with reservatrol over those of control-fed fish during the first weeks after administration. He wrotes also at Reservatrol has maybe weakly toxic action which stimulate a stress response and eventually increase lifespan.
Is this something at worry about and what dose to take?
In this dose-respond experiment fish treated with biggest amount of reservatrol lived almost 60% longer then fish on standard diet and fish treated with lowest amount of reservatrol lived as long as standard-fed fish (no effect).