dr. bill lloyd, our healthy living expert, joining us now from sacramento. dr. the difference between generic and brand-name medicine. >> the active ingredients in a brand drug and the generic pill have to be identical. but it's the other stuff in these tablets that make up most of the weight of these tablets. materials like fillers and binders and preservatives and buffers are not consistently used in generics. there's great variation. the point being, it can affect the potency and the metabolism of that drug. if you switch generics, it's always important to get back to your doctor four to six weeks later to make sure the pill still works the way it's supposed to. if not, switch to another generic or get back to the brand-name drug. >> some generic drugs can be up to 80% cheaper than brand-name medicine. it's hard to overlook that savings. >> it could make a big difference, we see the ads for $3 and $4 generics. there's a long list of them. a lot of them are very old drugs. but you have to be careful and if you have insurance, you want to make sure, what's my co

dr. bill lloyd, our healthy living expert joins us now from san francisco with more on this. so dr. exactly are they talking about the link between salt and dementia, how serious is this and at what age do you really need to pay attention to this. >> this study comes out of canada, a large number of adults age 64 and older, they followed them for many years, they tracked many of their lifestyle choices, including diet, their weight and their overall weight condition. at the end of the study they discovered that those adults who ate the most salt and exercised the least had the greatest trouble with early dementia. the point is if you back down on your salt young in life, you not only will have less problems with heart disease, but you may have more brain power. >> obviously the goal is to eat less salt. our bodies need a little bit of salt, how much is too much? i heard that a teaspoon is too much. >> you're exactly right. here's that teaspoon right here. that's one day's worth of salt that you want to bring into your body. we get 80% of our salt from food that we eat outside of the

dr. bill lloyd is in new york right now. how do fall allergies differ from spring allergies?ring allergies involve flowers and grasses so they are very geographic. different parts of the country have different amounts of allergies. in the fall it's ragweed. ragweed grows in all 50 states. each of these ragweed plants can put out 1 billion granules. no one is safe. you hear about pollen counts in the news. the only pollen count that matters is the one at the tip of your nose. kit be very high in your neighborhood and be very low some place else. >> why it is predicted this is one of the worst fall allergy seasons that we've experienced in a while? >> it has a lot to do with the extreme weather that we've enjoyed this summer in areas that were wet, of course, plants grow bigger. weather is very, zri these pollen gra numpb l-- granules gt bigger and more numerous. >> what can we do. >> stay away from the pollen. limit your outdoor exposure. get inside. close the windows. run the air conditioner to keep that filter clean. you might think about taking more showers. bathe more freq