Nicole Richie has checked herself into a private facility for an undisclosed treatment. According to a statement from Richie's reps, published on E! News, "She is working with a team of doctors and specialists whose focus is nutrition..."

Nicole will undergo diagnostic treatments to determine why she can't gain weight. Recent photographs of Richie have created a buzz in Hollywood that she may have issues with food.

Nicole's reps say "this is not a treatment for an eating disorder." The reps add that Nicole wants to deal with her weight issues in the healthiest possible way.

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