Casey Johnson‘s untimely death at the age of 30 was a result of her not taking care of herself or her needs as a diabetic, TMZ reports.

The L.A. County Coroner said Casey died in a natural manner caused by “diabetic ketoacidosis,” according to TMZ.

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Reportedly, Casey was also neglecting to take her insulin shots, not exercising, not following a diabetic diet and disregarding other medicines she needed, sources told TMZ.

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Diabetic ketoacidosis is a medical term referring to lack of insulin, which can lead to a diabetic coma.

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