A good diet for you may be bad for me

Eating the same foods can lead to different blood sugar spikes in different people

fruit donuts

CARB CONFUSION  Participants in a nutrition study had very different responses to eating certain foods. A cookie caused blood sugar levels to spike for one person but didn’t affect a second person. A banana produced the opposite reaction in the same people.

D. Zeevi et al/Cell 2015, torbakhopper/flickr (CC BY 2.0) (bananas); ThaneKeller/pixabay (cookies)

A cookie can give one person a sugar rush while barely affecting another person, a new study finds, indicating that a food’s glycemic index is in the eater.