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The team first fed astrocytes oleic acid, an omega-9 fatty acid naturally produced in the body.

Schirrmacher noted that oleamide has “a striking resemblance to oleic acid, a chemical released by arthropods during decomposition,” which may explain way it is mistaken for food and ingested by animals — which potentially increases their consumption of microplastics.

Consistent with the differences in the level of oleate-containing lipids between lymph and blood, the authors found that, of the 57 types of lipid detected in their experiments, the greatest difference between the melanoma cells from blood and lymph was in their levels of oleic acid.

Moreover, melanoma cells pretreated with oleic acid survived better in the blood after intravenous injection into mice than did untreated melanoma cells.

Full-blooded Wagyu meat is touted by the industry to have less high oleic acid and lower saturated fat.