You can test this hypothesis pretty easily since coffee oil is a surfactant. Get freshly roasted beans (ideally less than 2 weeks) and make your French press. O

You can test this hypothesis pretty easily since coffee oil is a surfactant. Get freshly roasted beans (ideally less than 2 weeks) and make your French press. Once the brew is ready, skim off the foam on the top and you will have removed a significant amount of the oils from the coffee. Be sure to taste blind, ideally using the triangle method. Edit: see also the studies about cafestol being strongly correlated with lower risk of renal cancer. This is a very complicated subject and the analysis of it should be done in concert with real medical professionals. https://pubmed.ncbi.nlm.nih.gov/34677742/ https://pubmed.ncbi.nlm.nih.gov/34677742/