'1000-Lb. Sisters' ' Tammy Slaton Has Already Lost 115 Lbs. in Rehab: 'Getting the Help She Needs'

Tammy Slaton.Photo: TLCJust one month into her stay at a weight loss rehab facility,Tammy Slatonis already making major progress.The1000-Lb. Sistersstar, 35, has lost 115 lbs. after just 30 days at a rehab facility in Ohio, her brother Chris shared duringthe show’s season finaleon Monday night.“I’m overjoyed that’s she’s ready to get on this train and start rolling down the tracks,” he said in the episode.And in an interview with PEOPLE, Tammy’ssister and costar Amysaid she’s happy to see that rehab is working.

'1000-Lb. Sisters' ' Tammy Slaton in Tears After Learning She's 717 Lbs.: 'The Most I've Ever Weighed'

Tammy Slatonis having a difficult time grappling with her recent health struggles.In PEOPLE’s exclusive look at the season premiere of1000-Lb. Sisters, the 36-year-old becomes emotional as she reflects on her weight gain on the day she entered rehab, and how it led to her being hospitalized.“Two months ago I decided to go back to rehab. I weighed the most I’ve ever weighed,” she said, before a clip shows her standing on a scale while her doctor reveals she’s 717 lbs.

'1000-Lb. Sisters' ' Tammy Slaton Is 15 Lbs. Heavier After Leaving Food Rehab: 'I'm Not Happy About It'

Tammy Slaton’s first weigh-in after leaving a food addiction rehab center earlier than planned leaves everyone in the room disappointed.The1000-Lb. Sistersstar, 35, goes to see Dr. Eric Smith, her bariatric surgeon, in this exclusive clip from Monday’s episode. Slaton is hopeful that she’s lost more weight, buther brother-in-law Chris, who accompanies her to the appointment, has low expectations.“Tammy’s not doing what she needs to do,” Chris says. “She’sin a relationship with a dudethat’s not got Tammy’s best interest at heart.

'1000-Lb. Sisters' ' Tammy Slaton Is Getting Weight Loss Surgery: 'This Is About Me ... Because I'm Queen!'

Tammy Slatonis getting an emotional sendoff as she prepares for her weight loss surgery. “I am nervous for Tammy. Anything could happen during surgery,“Amy Slatonsays. “I couldn’t picture a life without my sister.” In the clip, Tammy exits the facility and is shocked to see her loved ones gathered outside with celebratory posters and confetti. The family hung up a banner that read “Go Queen Tammy! You did the damn thing,” and she admitted that the sweet gesture was going to make her cry.

'1000-Lb. Sisters' ' Tammy Slaton Jokes That She's a 'Diet Soda Ambassador' After Dramatic Weight Loss

Photo: Tammy Slaton/Instagram Tammy Slatonis still loving her diet sodas even after getting weight loss surgery. On Thursday, the1000-Lb. Sistersstar posted a couple photos of herself drinking a bottle of Diet Coke, joking on herInstagram Storyabout her love for the soda even after her dramatic weight loss. “LOL I am a diet soda ambassador,” the 36-year-old wrote. “Remember diet sodas do not cancel out the sugar 💀💀💀please make better decisions,” one person wrote while another follower added, “You’re not suppose to drink soda after having bariatric surgery!