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Yellow soft shell D-vitamin capsule held to the sun. Helin Loik-Tomson / iStock / Getty Images

By Margherita T. Cantorna

Winter is upon us and so is the risk of vitamin D deficiency and infections. Vitamin D, which is made in our skin following sunlight exposure and also found in oily fish (mackerel, tuna and sardines), mushrooms and fortified dairy and nondairy substitutes, is essential for good health. Humans need vitamin D to keep healthy and to fight infections. The irony is that in winter, when people need vitamin D the most, most of us are not getting enough. So how much should we take? Should we take supplements? How do we get more? And, who needs it most?

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Pixabay

Summer is fast approaching, which means it's time to stock up on sunscreen to ward off the harmful effects of sun exposure. Not all sunscreens are created equally, however.

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EcoWatch Daily Newsletter

Partially bleached corals on Molasses Reef in the Florida Keys National Marine Sanctuary. Matt Kieffer / Flickr / CC BY-SA 2.0

City officials in Key West have put the cap on sunscreen—or at least varieties that contain chemicals believed to harm coral reefs and increase coral bleaching and death.

The Florida Keys is home to the third largest living coral barrier reef system in the world. The ecosystem is a habitat for fish species and other marine life and also serves as economically important touristic and recreational spot.

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By Monica Amarelo and Paul Pestano

Sun safety is a crucial part of any outdoor activity for kids, and sunscreen can help protect children's skin from harmful ultraviolet rays. Kids often get sunburned when they're outside unprotected for longer than expected. Parents need to plan ahead and keep sun protection handy in their cars or bags.

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