From Toothbrush Gate to illicit affairs and boozy nights out, it's safe to say this season has been the most debauched in MAFS history.
And NW can now reveal the drama and depravity have forced Elizabeth Sobinoff, Hayley Vernon, Vanessa Romito and Mishel Karen to seek treatment as they struggle to deal with the stress and anxiety that the show has brought about.
While all participants have access to therapists for weekly sessions – and a phone line available whenever things get too overwhelming – we're told the situations of these four stars called for more extreme help.
And in Vanessa's case, it's meant in-patient treatment!
With returning bride Lizzie already telling NW she's suffering PTSD following her first MAFS stint, there are rumours she was hospitalised while getting treatment for anxiety and depression.
"She's been an absolute mess," tells our source.
Word is, Lizzie and hubby Seb Guilhaus called it quits shortly after filming wrapped earlier this year.
The split devastated Liz as she "really fell for the guy", adds the insider.
We hear production is keen to still bill Lizzie, 28, and Seb, 30, as this year's Cam and Jules as they desperately need at least one couple to make it to the finale.
But the charade of keeping up appearances has taken a toll on Lizzie.
WATCH BELOW: Sam reveals to Elizabeth he has to leave for the funeral on MAFS last season. Post continues after video...
"She is so stressed and nervous," one current MAFS participant confirmed to us at a recent event in Sydney.
"Lizzie looks downright ill, like she hasn't eaten in weeks. The poor girl is 100 percent concerned about how Australia will perceive her this time around.
"She definitely sounds like she's regretting going on the show again as she's been paired with another Sam Ball type. She hasn't eaten a thing tonight.
"I even saw her pick up some food and smell it... She's not doing well at all."
And fellow bride Hayley, 32, is said to be on her way to a rehab facility.
The recovering meth addict has admitted to relapsing, taking ecstasy in January and "mushie shakes" while in Bali for New Year's Eve.
"Hayley worked so hard to get sober. Everyone hates seeing her like this. But she's a strong girl, so we're confident she'll bounce back from this slip-up," a pal tells.
As for Mishel, 47, she's been in intense therapy due to the emotional turmoil her hubby Steve Burley put her through.
"Mish became a shell of a human being," an insider says.
"Steve put her down all the time. That sort of stuff can break a person."
Meanwhile, Vanessa, 31, has been seeking psychiatric treatment following her emotional breakdown during filming.
As reported by NW, multiple sources claim the "hyperventilating" MAFS star required urgent psychiatric attention when her marriage to Chris Nicholls exploded.
Since then, she's been seeing a shrink twice a week.
"MAFS really did a number on all the girls," says the mole.
"But there's no chance they'll let it beat them." Amen!