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Interviewer: Vitamin D and sun exposure -- kind of a controversial subject. Tell me a little bit about what is the controversy and do I need more sun in my life? Do I need a lamp?
Dr. Daniel Levy: While we know that vitamin D is important, the question is how to make sure we have optimal levels of vitamin D in our body. It's important and useful to get some from the sun but not all of it from the sun. Just like anything else, in moderation.
Paula Begoun: What's often misunderstood about vitamin D, one, is that the sun isn't the only way to get it. The notion that sunscreen blocks vitamin D and that's why we're deficient is just ridiculous because only 10% of the population in the world uses sunscreen on a regular basis. We can't beat sunscreen that's blocking the issue. Mostly it's our indoor lifestyle. However, this research just blew me away, is that if you get a tan, dark skin actually blocks the UVB rays that generate vitamin D. If you thought, sitting out, "Oh, the darker I am the more vitamin D I'm getting." It's actually doing just the opposite.
Oh, ask me about baby sunscreen.
Interviewer: What about baby sunscreen?
Paula Begoun: Some of the worst products for babies have cute little babies on the label. The only sunscreen ingredients that should go on a baby's body should be titanium dioxide and/or zinc oxide.
Dr. Daniel Levy: I think the studies have shown that even a few minutes in the middle of the day of just sun hitting your forearm, that's enough to stimulate the amount of vitamin D that your body needs for that day.
Interviewer: Do SPFs act together? Let's say I'm putting on an SPF40 as a sunscreen, and then on top of that, my BB cream has SPF40 as well. Does that mean I have SPF80? Does that mean I have more protection? What does it mean?
Dr. Daniel Levy: They're not added. I don't think it's as simple as adding 30 plus 15 gives me 45. Part of it is how often they're being reapplied, how evenly and well they're put on.
Paula Begoun: I would strongly disagree with that. I don't know that you necessarily need more depending on the kind of sunscreen you're using, but there's no question when I'm formulating a sunscreen the way I formulate it to get a higher SPF as I can, more sunscreen ingredients. If you put more sunscreen ingredients on, you're getting more sun protection, and we don't know exactly how much. It isn't a science because we haven't measured it. You put a 30 over a 15 or a 10 or a 20 or whatever you choose to layer, I'd layer sunscreens all the time. You're getting some amount of added protection just by a formulary definition.