Information and opinions on health from Emma Raines at HealthCentral.com. HealthCentral.com is one of the top health destinations on the Web, with more than 35 condition-specific, wellness and general health Web properties. http://www.healthcentral.com/profiles/c/62492/index http://www.healthcentral.com/profiles/c/62492/rss self application/xml en-us 15 120 19 http://www.healthcentral.com/images/hc_logo_sm.gif http://www.healthcentral.com/profiles/c/62492/index http://www.healthcentral.com/diabetes/c/62492/17900/reins-whats Sun, 16 Dec 2007 11:40:00 -0500 Emma Raines Can someone please help me understand "exchanges"?  They never seem to make any sense for me?  When I see the word "exchange" my brain shuts down.   :)  :)    http://www.healthcentral.com/diabetes/c/62492/17900/reins-whats