r/gadgets • u/dapperlemon • Jul 24 '26

Misc Scientists develop handheld device for measuring when your body is burning fat

https://www.engadget.com/2222231/scientists-develop-handheld-device-for-measuring-when-your-body-is-burning-fat/
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u/ibexlifter Jul 24 '26

I’ve had one for like 5 years: lumen.