PLANTBASEDDIET: News about cancer and how it metastasizes?

What Causes Cancer to Metastasize?
Michael Greger M.D. FACLM June 7th, 2021 Volume 54 

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Palmitic acid, a saturated fat concentrated in meat and dairy, can boost the metastatic potential of cancer cells through the fat receptor CD36.

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I wonder why we humans haven’t realized the connection between diet and disease?