Kristen Bell's biohacking trick really works, says dietician

She may no longer be narrating the scandalous lives of Manhattan’s elite, but Kristen Bell is still dishing secrets — only now, they’re about blood sugar, not Blair Waldorf.

At the Emmys, Bell’s “Nobody Wants This” co-star Justine Lupe revealed the “Gossip Girl” alum’s go-to biohack for eating carbs without the crash or the weight gain.

“You ask her anything about your glucose levels, you ask her how to plug up your system before you eat a bowl of pasta — the woman knows what the heck to do,” Lupe, 36, told E! correspondent Zuri Hall on Sunday. 3

Bell’s method involves grazing on spinach or other leafy, fibrous greens before a carb-heavy meal. If those aren’t available, Lupe said Metamucil or a shot of apple cider vinegar (ACV) also do the trick.

“It, supposedly, stabilizes yo