A vegan influencer is copping a king-sized serve from forlorn followers after she began eating meat – and nothing else – for 30 days.

US YouTuber and Instagram star Alyse Parker revealed her epic pivot to her 728,000 subscribers in a video posted late last week.

In it, she describes what happens when she adopts The Carnivore Diet for 30 days – no carbs, no plants, no fruit, just animal products.

Know the news with the 7NEWS app: Download today 

And she says she is happy to leave her vegan activism behind.

“I know what it is like to lose myself in the identity of a diet culture,” Parker said.

Big move

In an Instagram post published before the video was released, Parker further explained her thinking, noting her previous “experiments” such as not using shampoo for 30 days, consuming only fruit juice for 21 days and three years of not wearing makeup.

“Coming from being vegan 4.5 years, I was hella resistant to the concept of eating ONLY animal foods (aka only meat, seafood, + eggs),” Parker wrote. ⁣

⁣”It didn’t make ANY sense to me … But oddly enough, I started to hear story after story from my fellow vegan friends jumping ship, testing out the carnivore diet and experiencing amazing health transformations.⁣”

“With an online community of 800,000 people – many of which were primarily showing up for my vegan related content… I was a bit conflicted to say the least. ⁣

“‘My vegan identity crumbled immediately.’⁣”

“But also … My vegan identity crumbled immediately. ⁣⁣”This past year of my life has been a journey of remembering who I am separate from what I eat,” she said.

Epic backlash

“You were my inspiration at first and now you support the exact opposite,” one person responded.

“You’re part of the problem,” another said.

Others were harsher.

“‘Good luck with cancer and your arteries.'”

“Good luck with cancer and your arteries. Also you don’t have the right to contribute toward the rape and slaughter of another individual.”

“How can one be so selfish .. ashamed to be human right now,” another said.

“The only thing you are eating now is dead bodies and you call that ‘growth’?”

Another poster accused Parker of never being vegan but rather “jumping on the money and fame train”.

“You actually disgust me,” the poster said.

“Absolutely revolting and disgraceful. You should be ashamed of yourself. You stand for murder. You stand for torture. There is nothing ‘loving’ or ‘compassionate’ about you!”