X-Message-Number: 13001 Date: Sat, 25 Dec 1999 13:43:27 -0500 From: Paul Wakfer <> Subject: Re: CryoNet #12994 Blueberries References: <> > Message #12994 > Date: Fri, 24 Dec 1999 11:52:43 -0800 (PST) > From: Doug Skrecky <> > Subject: blueberries > > In Message #12984 wrote: > > > Do canned blueberries retain the benefits? Fresh blueberries are not > > available for most of the year. > > > I don't see why not. Fresh blueberries were not used in the rodent > experiment. Freeze-dried blueberries, that were reduced to a powder were > used. One might expect drying the blueberries would denature the > proanthocyanidins. Technically, only proteins or other highly complex chemicals with tertiary folding can "denature". Proanthocyanidins are relatively simple chemicals which can be changed to other chemical forms by reacting with other chemicals, or maybe changed to unnatural and possibly less functional sterioscopic forms by sufficient temperature rise, but they cannot be "denatured". The major problem with any canned blueberries will be find any that do not contain a lot of added sugar which has negative life extension benefit. > However blueberries also contain sugars, which > can hydrogen bond and prevent denaturation. Since proanthocyanidins can not "denature", the bonding of sugars, if it takes place (which I doubt), would change the proanthocyanidins and might also make them less functional (a sugar bonded to any nutrient is generally hard to remove and makes the nutrient much less bioavailable). -- Paul -- Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=13001