Health + Wellness — Biology

Woman Making Vitamin D In The Sun

Vitamin D And Sunlight: How To Know If Your Sun Exposure Is Producing Vitamin D

There’s a lot of confusion surrounding sunlight and the production of Vitamin D. People commonly think that if the sun is up and they are outside in the sun, they are going to produce Vitamin D. This is not the case! There are many reasons why you won’t make Vitamin D in the sun—even during the middle of the day. But most significantly, the sun cannot stimulate your production of Vitamin D if the sun isn’t high enough in the sky. UVB Rays And Vitamin D The reason is that UVB rays—and only UVB rays—catalyze the production of Vitamin D....

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Antioxidants In Foods

What Are Antioxidants And Why Do You Need Them?

Overview As was discussed in a previous article, What Are Free Radicals?, just the very act of living–breathing, eating, and building up and breaking down the tissues and structures that make up your body–generates free radicals. These free radicals are necessary for many reactions that occur in your body, but if not precisely controlled, these free radicals can cause problems. The reason is because free radicals are highly reactive, and as such can cause damage to anything close to them. This damage, if not repaired, can lead to permanent changes in your body and what you eventually see as a...

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An Unstable Free Radical

What Are Free Radicals?

Overview Free radicals are atoms or molecules with unpaired electrons. These molecules are considered oxidized. Because in most molecules this state is very unstable, free radicals are highly reactive and therefore try to pair these unpaired electrons in whatever manner they can. This unstable state is often stabilized when the free radical grabs or shares an electron from or with another molecule (when the free radical is reduced). Often a free radical is stabilized when it grabs a free electron from a nearby molecule that is stable, causing that molecule to now become a free radical and be unstable itself....

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