Organic, free-range, or factory farmed—according to a new study conducted by UC San Diego’s School of Medicine, all red meat and milk spurs the growth of cancerous tumors.

Researchers found a non-human cellular molecule called N-glycolylneuraminic acid (Neu5Gc) inside human cancerous tumors. The study, published Friday in the Proceedings of the National Academy of Sciences, found that the molecule causes inflammation and further cancer cell growth.

As it turns out, that molecule is found solely in animal-based food products like dairy and red meat. Perhaps PETA was right to suggest meat-eaters deserve higher insurance premiums.

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