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>> we'll get to our fit nation and lucky seven in just a moment. first we have big medical headlines to get to are from the mainland. an h.i.v. test you request do by yourself at home. just got unanimous backing from an fda advisory panel. you get the results in about 20 minutes, and if it's approved this year, as expected, the test would be available in drug stores over-the-counter. the thinking is quite simple. it says that more people will likely be tested for h.i.v. if they can do it in the privacy of their own homes. >> if you are at home by yourself, you are at home with some l...

malibu triathlon in september. let's get started. >> we'll get to the fit nation lucky seven in just a moment. first, we have big medical headlines to get to. an hiv test you can do by yourself as home just got unanimous backing from an fda advisory panel. you get results in 20 minutes, and if approved it will be in drugstores over the counter. the thinking is quite simple, so more people will be tested if they can do it in the privacy of their own homes. >> if you're at home by yourself, at home with loved ones and the test comes up positive, you have to prepared what you're going t...

They don't want to give people false sense of security to put it on in the morning once and they're good all day. it's not true. most sun screen protect against the sun burn, uvb rays but there are uva to cause premature damage and skin cancer. now the sun screens will have a rating of the u.v.a. also. they have to cover both. anything over 50, spf factor, they're not allow to say, because they have to prove that it protects you that long. the key is reapply it and do it, it's not waterproof. you have to do it after you get out of the water. think about those things. >> brian: let me add a per...

As long to cause a sunburn, versus not wearing any sunscreen at all. but you know, between 30 and 50, you're only getting a percent there. and they're focused on uvb rays. we've talked about this before, the uva and uvb. most sunscreens just do uvb. uva can be problematic. find a broad spectrum sunscreen that covers both. >> maybe when we lean towards the 50 or the 30 we're thinking we don't have to apply it as much. maybe it's smarter to stick with the 15 because you've got to reapply? >> absolutely right. people think i've got 100. good, dr. fred, i like that. if you put spf of 100, they fig...

Being sold. how much of a difference in protection does that make? or in n some cases are you lulled into false sense of security with it? >> well, this was a -- a big target for the environmental working group as well. i guess the best way to sort of characterize it is to say that there are diminishing returns as you get higher and higher in numbers. there's big concern they say look, you know, people use the higher number thinking that they need to use less, that's just not the way it works. spf, sun protection factor, it means if you put on sun protection factor of eight, it will take eight...