Weight Loss & Weight Gain

He's definitely slimmed up ... but Eddie Lacy says he refuses to put an exact number on his weight loss because "I don't do scales."

The Green Bay Packers RB touched down at LAX this weekend -- so, we had to ask about his off-season workout regimen with P90X creator Tony Horton.

Lacy says he's feels great ... and he doesn't need a stupid scale to prove it.

But at some point, the Packers are gonna make him get on a scale right??

Mama June's going under the knife to find a safer weight loss solution ... after falling unconscious multiple times.

We're told June is set to go in for gastric sleeve surgery later this month, and hopes to lose at least 80 more pounds. She's been on a crusade to slim down so she'd be healthy enough for the surgery. She's already dropped 90 lbs.

We're told "sleeve specialist" Dr. Michael Feiz in Beverly Hills will perform the operation.

TMZ broke the story ... June was hospitalized two weeks ago after collapsing. Although doctors couldn't pin down the problem, we're told they suspect she was pushing her dieting too far.

Rob Kardashian and Blac Chyna want you to believe he's in the throes of a crash diet, but get a load of his carbo-load and the booze to help wash it down.

Rob and Chyna hit up Benihana in Encino for lunch Tuesday ... and our Far East sources tell us they wolfed down a "whole bunch of sushi," as they sipped on a couple rounds of sake and mimosas.

Rob's had issues with substance abuse, and Chyna's fresh off a daytime arrest in Texas after getting wasted at the airport.

That said ... it looks like Rob's losing a bunch of weight.

The Benihana diet. Who knew?

Jared Fogle is a lot of things ... but one thing he's not is fat.

Fogle has reportedly been on a downward dietary spiral at Englewood prison in Colorado ... supposedly heavier by 30 lbs and counting, courtesy of the prison commissary.

Fogle's attorney, Ronald Elberger, tells us it's all a lie ... his client hasn't gained a pound in prison ... to the contrary he exercises regularly on the prison track.

He's eating standard prison fare, including soups, burgers, beef stew, BBQ chicken and enchilada casserole. There are reports he's scarfing down Honey Buns ... Elberger says not true.

The lawyer says Fogle is actually doing quite well in the first few months of his 15 year sentence.

Rob Kardashian is showing glimmers of a toned body, judging from what looks like some pretty muscular calves.

Rob arrived at LAX Monday and his body was almost entirely shrouded in workout gear, but there are certainly signs he's dumping the weight faster than his sister 86'd Kris Humphries.

Lookin' good.

Finally, hard evidence GB Packers running back Eddie Lacy took up the offer to train with P90X creator Tony Horton -- and we gotta say ... the dude looks like he's already getting results.

Check out the photo Tony's training pal Bobby Stephenson posted on Facebook -- showing Eddie and Tony after a workout with the caption, "Crushing Shoulders and Arms P90X Style."

Packers coach Mike McCarthy had said he wanted Lacy to shed some serious LBs before next season -- and that's when Horton volunteered his services.

Check out what Lacy looked like 31 weeks ago ... looks like Lacy is taking the workout plan very very seriously.

Oprah Winfrey took a very unwanted bath after Weight Watchers stock took a huge hit.

WW shares dropped a whopping 20 percent when the company reported a 21 percent drop in fourth-quarter net revenue -- which means O's bank account is about 24 million bucks lighter today.

Cry not for Oprah -- she's still reportedly cleared nearly $75 million since buying a 10-percent stake in the company and joining its board. The stock doubled the day her deal was announced ... but it's looking more like your typical yo-yo dieter now.

Chris Pratt says he's not as fit as you think, but the secret will soon be out because he may just go back to being fat Pratt.

We got Chris out at LAX Wednesday afternoon and he was super excited about "Guardians of the Galaxy 2." But he's also a little bummed about his favorite alcoholic drink that's not on the diet.

Blac Chyna went ham on Kris Jenner and her family for daring to help stock Rob Kardashian's new kitchen with healthy food.

Check out the video ... Chyna scoffs at the food choices, including fat free sorbet, I Can't Believe It's Not Butter, wheat tortillas, oatmeal and quinoa. BTW ... there's also pizza crust mix, although it's wheat.

TMZ broke the story ... Kris helped Rob buy a house in the Calabasas community where his sisters live. It seems Chyna's none too happy his family is back in the picture.

Our Kardashian sources tell us they think it's despicable Chyna's making fun of Rob's family for trying to help him beat his diabetes and weight issues.

To Chyna's credit, Rob has lost around 40 lbs on her watch.

Rob made it clear which sides he's picking between Chyna and his fam with a very descripitive IG post late Tuesday night ...

Rob Kardashian is sticking to a strict diet -- no fast food, regular workouts and lots of Blac Chyna ... and friends think it's already helped him shed about 40 lbs.

We're told Rob's also cut out red meats and carbs while hitting the gym 5 times a week with a trainer ... plus additional workouts with Chyna.

We're told the couple made a "no cheat days" vow, and they're motivating each other to stick to it.

It's hard to say the program isn't working, based on recent pics. Some home cookin' from Blac Chyna doesn't hurt either ...

The only thing more obvious than Rob Kardashian's confidence coming back ... is that Blac Chyna does a body good!

Rob made a rare public appearance with his GF on Tuesday -- looks like the couple was out in L.A. running errands in the tight confines of her Audi R8 sports coupe. As we've reported, Chyna got her man back in the gym where he's been working out regularly and dropping the lbs.

Zach Galifianakis' dramatic weight loss has gone next level ... even the guy's beard is thinning down!

The funnyman looked like a fraction of his Carlos-toting 'Hangover' character on his way into lunch Wednesday in Venice.

Zach's said he dropped the lbs through healthy eating and less boozing. Whatever he's doing looks wayyy better than any of the 'Hangover' sequels.

Especially #3.

Dr. Oz is getting called out again over a "magic weight-loss cure" he touted on his TV show ... this time in a class action lawsuit.

The suit is all over weight loss supplements containing Garcinia Cambogia ... which is green coffee bean extract. They're sold by a company called Labrada, and Dr. Oz covered the products on an episode called "Five Biggest Fat Busters for Five Body Types in Just Five Days."

The suit, filed by a consumer on behalf of all purchasers, says Oz described Garcinia Cambogia as a revolutionary fat buster which "could be the magic ingredient that lets you lose weight without diet or exercise." The suit says the "Oz Effect" caused sales to skyrocket.

Oz already had to testify about this product for a Senate panel in 2014, and during the grilling he leaned on evidence from a scientific study. But the lawsuit points out that study has since been discredited.

According to the suit, "all credible scientific evidence" shows Garcinia Cambogia simply doesn't work. The plaintiffs are going after Oz, Labrada, Harpo Productions and others to get their money back plus damages.

Answer: Hemsworth ... after he dropped major lbs for his starring role in Ron Howard's upcoming "In the Heart of the Sea."

Hemsworth plays a sailor stranded at sea in the Moby Dick-inspired flick, so he obviously got way into character. He posted the throwback pic from the set saying he wouldn't recommend the diet to anyone.

Hard to believe that's the same guy who plays Thor, but the good news is Chris is back to his standard beefy bod since filming.

Oprah is at the top of the weight loss totem pole, with so much swing even companies in head-to-head competition with Weight Watchers are praising O's latest business move.

A rep for Nutrisystem tells TMZ, Oprah's $43.2 million Weight Watchers investment helps everybody in the biz, saying, "We have a great amount of respect for Oprah and the spotlight she brings to the industry."

Nutrisystem is confident it'll keep its customers. The rep says, "It's a very large market that requires multiple solutions to meet consumers differing needs and lifestyles."

Bob Harper thinks it's a stroke of genius on Weight Watchers' part to team up with Oprah, because she's a 10 on the relatability scale.

We got "The Biggest Loser" trainer leaving Brick CrossFit in West Hollywood Monday, after Weight Watchers' stock doubled on the heels of the announcement Oprah now owns 10% of the company's stock and will sit on its board.