Rob Kardashian and Blac Chyna Credit: VM/FAMEFLYNET PICTURES

The way to a man's heart is through his stomach, and Blac Chyna is making sure that boyfriend Rob Kardashian's stomach is a little less flabby than it used to be.

In a series of NSFW Instagram videos posted by Kardashian, 28, on Friday, February 19, Chyna, 27, can be seen picking through his kitchen cabinets one by one to make sure he's eating well.

Holding some Raincoast Crisps, the mom of one says, "Babe, what is this?" and Kardashian replies, "What the f--k is this?" They both laugh before moving on to the next item: Sharon's Sorbet. "Nah," Chyna says. "Are we supposed to eat this?"

Clearly the model is on a one-woman crusade against carbs, because she just laughs when she encounters packages of tortillas, then yells, "What the f--k is this," when she finds a bag of quinoa in his bare pantry as Kardashian holds up a box of pizza crust mix.

Even Irish oatmeal is not OK. "I mean I get his birthday is on St. Patrick's Day," she says, which explains the clover emojis they use in their posts, "but what the f--k is this, bruh?"

Also no bueno? A tub of I Can't Believe It's Not Butter. "Nah, man," she says.

Then it's on to the spice cabinet, which holds some Mrs. Dash, Hawaiian salt, a large container of table salt, several bottles of garlic salt and toothpicks. At this point it sounds as if Kardashian is tiring of this game, because he can be heard grunting, sighing heavily or moaning in pain.

Chyna wears a big cozy robe as she addresses the camera in the next video. "Sometimes in life you have to eat healthy," she says, which elicits another noise from Kardashian. Was that a whimper?

It may not be his idea of fun, but Chyna's tough love is working, as pics taken this week show that the formerly reclusive reality star has shed some of the 100 pounds he gained over the past three years.

As Us Weekly previously reported, not all of his family are happy about the new couple (Kylie Jenner is dating Chyna's ex and baby daddy, Tyga), but the fact that the model is getting Kardashian out of his slump and into the gym is undeniable.

"Everything about him has changed," a source close to the Kardashians told Us earlier this month. "She's been so good for him."

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