For those not drinking coffee, here is something that @ecstatichamster posted in Oct 2017:
Red grape juice inhibits iron availability: application of an in vitro digestion/caco-2 cell model. - PubMed - NCBI
And he said he was drinking red grape juice with his meat. And, recently, Ray Peat has said that he is drinking some grape juice now. So, if you can't drink coffee with your meat to block iron, grape juice sounds good for this.
Red grape juice inhibits iron availability: application of an in vitro digestion/caco-2 cell model. - PubMed - NCBI
And he said he was drinking red grape juice with his meat. And, recently, Ray Peat has said that he is drinking some grape juice now. So, if you can't drink coffee with your meat to block iron, grape juice sounds good for this.