We paired an Apple Watch with the Lumen metabolism tracker

Ever since I first started testing wearables, I’ve been hoping that something would come along that could help me take better stock over what kind of food I was putting in my body and understand the impact it had on my body.

Lumen isn’t a wearable, but it does play nicely with them. It has the appearance of a vape, and promises to track your metabolism. You inhale and exhale into it, and it can tell whether your body is burning carbohydrates or fat.
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