Rob Kardashian has remained out of the spotlight for over a year now after he had gained over 100 pounds and even though rumors started to go around that the reality star was doing much better, new reports claim that the Kardashian brother is falling back to his old ways.

"Rob has gone off the rails again," an insider told Radar Online. "He is, once again, out of control...He was doing so well for a minute but is now off the radar again and he seems to feel neglected because the entire family is so focused on Kim, as usual. Nobody knows what to do anymore because Rob will not even leave the house. He seems really bad off and everyone is really worried...the family is terrified!"

Ever since his sister Kim gave birth to her son Saint West earlier this month, the whole family has been focused on her and the new baby and has been less focused on Rob, and this has apparently been causing him to become more depressed again. What's scaring the family the most, though, is that since he's still struggling with his weight, he's taking some pretty drastic measures to try to slim down. He's reportedly on this dangerous diet that's a master cleanse and is called the "heart attack diet" and causes you to lose weight at an alarming rate, and puts a lot of stress on your body.

"Rob's been yo-yo dieting for years, but the constant stopping and starting of it all is taking a real toll on his health," another insider told Radar Online. "He's dehydrated all the time, gets palpitations and it's putting a lot of stress on his heart while his body goes into starvation mode. He should be taking the same time to lose this weight as he did to put it on, but now that he's seeing results, you just can't stop him."

Just last week, his sisters Khloe and Kourtney both shared random messages of support for Rob on social media and had people wondering if everything was okay with their brother. "If only you could see yourself through my eyes! I'll forever be obsessed with you! My one and only!" Khloe captioned a throwback photo of the two. Kourtney then posted a photo of the two holding hands from a while ago simply writing, "Bobby," with a heart.

Everyone in the family is upset to see Rob, 28, still going through all of this. "Rob is still struggling and it makes the family sad," a source told People. "He deals with depression, weight issues and low self-esteem, but that's been going on for a long time. The family, especially Khloe, is very much there for him but it has to be his own journey to figure out."