More stem cell research, chemical sensitivities, appropriate use of bisphophonates and more

Summary: Advances in stem cell research for restoring bone marrow and retinal cells — public research is praised; Observations and research are noted by a listener about causes of obesity from increased sugar intake; Exposure to toxic chemicals is probably the cause of this person's liver problems; When injectible bisphosphonates are a good idea; Are there stem cell approaches to treat Alzheimer's disease? Review of recent critical reports about vitamin supplements; Caller asks about seafood radiation contamination from nuclear reactor in Japan; Dealing with a diaphragm disease that impedes breathing; Asthma attacks while traveling abroad — bring an inhaler