Mandy Moore Reveals Serious Autoimmune Disorder

Though her posts are usually upbeat and positive, Mandy Moore took to Instagram to share with fans a not-so-glamorous side of her life.

The This Is Us star revealed Friday that she’s been diagnosed with Celiac disease, and asked followers for tips on dealing with her new reality.

Celiac disease is an incurable immune reaction to eating gluten, a protein found in wheat, barley and rye. It also prevents some important nutrients from being absorbed into the body. If exposed to gluten, a person with this chronic condition may experience diarrhea, bloating and fatigue.

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Though it can’t be cured, Celiac disease can be treated with a gluten-free diet and dietary supplements and vitamins.

In Moore’s case, the star already ate fairly healthy, but this transition to mainly plant-based foods can be overwhelming.

“I’m not obsessive about dieting,” Moore told PEOPLE last year. “If I want to have a burger and fries like I did [the other] night in the park, then I’m going to do that because that’s okay.”

The actress recently when on a detox retreat, and while her new normal won’t be quite as intense, those traditional burger and fries nights will need to be substituted.

“I did the four-day version [of the detox retreat] instead of the full week, but it’s just as intense!” Moore told Refinery29. “You wake up at 5 a.m., it’s all vegetarian food, and you go on four-hour hikes every day, followed by yoga classes. I really wanted to challenge myself. It was more of a spur-of-the-moment decision; a year of yes sort of thing.”

Other stars like Jennifer Esposito have been candid about their struggles with Celiac disease, and Tia Mowry has been open about treating her endometriosis with a healthy diet.

Photo Credit: Getty / NBC Contributor