Category Archives: did-you-know

Ultraviolet sunlight and UV400 protective lenses – what you should know

article about UVA and UVB sunlight

Vitamin D Outdoor activities in the summer or winter are not only fun, but they are very healthy too. Cold air contains more oxygen and working out outdoors, is generally healthier than working out indoors. But by being outside you are exposed to Ultraviolet radiation from the sun, which can be both positive and negative.