She told her 727,000 subscribers that after being vegan for five years, she knows "what it's like to lose myself in the identity of a diet culture and lose true open-mindedness".
"I knew I needed to make decisions based on what was in the best interest for my health.
"I swallowed my pride and decided I'd give it a shot. Full on carnivore.
"I woke up the next morning feeling more mentally clear, focused, wholesome and healthy than I had felt in years."
Parker said after eating meat and animal products for 30 days she felt more focused and healthy than she had in years. Photo / Instagram
During the 15-minute video, Parker filmed herself eating bacon, salmon, steak, and eggs, and told viewers she would keep "mostly eating animal foods".
But those who followed her for her vegan content didn't take it so well.
"Cows experience fear and pain. They have family units. They understand they are going to die when they are butchered," one commented.
"Factory farming of beef is not only cruel to intelligent animals but incredibly awful for the environment. You're part of the problem, don't pretend like you're part of the solution."
"Can we stop pushing extreme dieting and veiling it as wellness and transformation. It's toxic," said another.
Another accused Parker of "always taking stuff to the extreme".
But not all the comments were negative, with fellow ex-vegans rushing to her support.
"Ex vegan here too girl," one wrote. "Finding out who you are outside of what you eat is one of the biggest challenges when you are entrenched in a cult-like mentality."
"I'm so proud of you for being honest about your diet and lifestyle. I support you 100%,"commented another.
"I know many people who feel better with meat in their diet! Can't wait to follow your journey more."
