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IMAGE: The UV active ink can be printed on paper making sensors cheap and easy to produce. view more 

Credit: RMIT University

Keeping an eye on your personal ultraviolet (UV) exposure throughout the day could soon be as simple as wearing a sticker thanks to new wearable sensors that help people manage vitamin absorption and avoid sun damage.

A personal struggle with Vitamin D deficiency led Professor Vipul Bansal to develop the color-changing sensors that come in six variations to reflect the range in human skin tone.

Bansal said the discovery could help to provide people with an accurate and simple measure of their personal exposure levels throughout the day.

“We can print our ink on any paper-like surface to produce cheap wearable sensors in the form of wrist-bands, head bands or stickers for example,” he said.

While humans do need some sun exposure to maintain healthy levels of Vitamin D, excessive exposure can cause sunburn, skin cancer, blindness, skin wrinkling and premature signs of aging.

Knowing what a healthy amount is for you depends on understanding your personal classification, from Type I to VI, as each has very different solar exposure needs.

Diseases such as Lupus and many

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