Laser Probe Knows If You Ate Your Veggies, Yale University Study

A diet full of fruits and vegetables is good for your health, but accurately measuring how much people—especially children—actually eat can be challenging. Researchers have demonstrated for the first time that a new device, which uses blue laser light to quickly and painlessly scan the skin of a subject’s palm, accurately measures changes in a biomarker known as skin carotenoids in response to an intervention involving a diet enriched in fruits and vegetables.

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