In a long Instagram post, the "Riverdale" star said she decided to question her lifestyle choices after she recently met a naturopath.
"When did being thin become more important than being healthy? I recently went to a naturopath for the first time in my life. I told her about my anxiety around food and my obsession with dieting. She phrased a pivotal question in such a way that struck a chord with me: what other things could you be thinking about if you didn't spend all your time thinking about your diet?
The 23-year-old actor said her constant worrying attitude ate into her favourite pastimes such as "education, cinema, music, etc."
"I'm done believing in the idea that there's a thinner, happier version of me on the other side of all the tireless effort. Your body type is subject to genetics, and while eating nutrient-dense foods and exercising regularly will make you healthier, it will not necessarily make you thinner, and the current system fails to make that distinction," she added.