Understanding ultraviolet radiation - Toronto Dermatology Centre
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Understanding ultraviolet radiation

By Dr. Mariusz Sapijaszko

The sun – the source of energy for life on earth – also emits potentially dangerous rays that damage our skin

Ultraviolet light is essential to life on earth – but it can also kill. Emitted by the sun, ultraviolet light warms the earth, is used by plants to store energy as carbohydrate molecules (which also releases life-giving oxygen as a waste product) and enables our bodies to produce vitamin D, an essential mineral for our health. However, ultraviolet light also has a dark side, causing damage to our cells that can lead to premature skin aging and cancer.

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