The 26-year-old told WHO on Tuesday that she never intended to "shove" her new eating plan "down anyone's throats" and apologised for offending people.
But it didn't take long for Abbie, who has long been vocal about spreading body positivity, to weigh in on the saga.
"Step 1: promote “diet” that Jordan Peterson is on, that is more akin to an eating disorder," she commented on Instagram under a post about Elly's apology.
"Step 2: talk about said “diet” publicly. Step 3: post an infographic literally labelling foods as toxic.
"Step 5: gaslight your audience and tell them THEY misinterpreted your post. Tell them you never said vegetables were toxic. Despite literally saying they are toxic."
Abbie went on to sarcastically call Elly, whom she met while competing for Matt Agnew's heart on season seven of The Bachelor, a "genius" before reminding her followers of the dangers of calorie counting.
"Just an FYI, any diet that uses words like “toxic” or “good” and “bad” foods can very f**king easily feed into [eating disorder] rhetoric and IMO is fatphobic," she wrote.
"Foods aren’t good or bad, they’re f**king foods we need to live. This is some calorie counting my fitness pal s**t that needs to be wiped from our collective psyche."
And hundreds of Instagram users clearly agreed with Abbie's sentiment, with her comment garnering more than 800 likes in just a few hours.
Elly is sticking to a carnivore-based diet as part of her gym’s eight week “Power Through Me” challenge after deciding she wanted to gain some extra muscle.
“I’m getting heaps of questions in my DMs about Carnivore! I’ll edit my 2 week IGTV tonight and try to get it up!” she wrote in an Instagram Story, which quickly attracted criticism.
Elly's own fans appeared to turn against her after she posted the divisive health advice.
“Influencers shouldn’t promote any kind of diet unless they are a qualified dietician & offering individual consultations. It’s so dangerous for their young followers," one wrote.
“Imagine becoming an influencer and of all the current problematic and political issues you decide to use your platform to demonise vegetables,” wrote another.
Elly's post even prompted the Butterfly Foundation, a charity aimed at supporting Australians with eating disorders, to spread awareness about the potential damages of taking health advice from non-professionals.
"Social media can be vortex of information, health advice and tips that are often posed as credible, scientific claims. But not everything you see online is true or based on scientific fact," the foundation wrote in an Instagram post on Tuesday.
It isn’t the first time Abbie has taken a public swipe at Elly. On Australia Day this year, Elly attended a change the date rally before filming herself partying at a boozy patriotic barbeque.
The I’m a Celebrity… Get me out of here! winner called out Elly for her "hypocrisy," saying it is the “easiest f**king decision” to stay away from celebrations on January 26.
“You aren't being the change if you're participating in harmful traditions.
"It is the EASIEST f**king decision. To just NOT. Hottest 100 is now on the Saturday, you can celebrate the long weekend with your friends then. I did! Without an Australian flag in sight.
"The level of cognitive dissonance in believing that you can ACTUALLY attend a rally and then just pop on over to your pool party is something else."