First off, no one is going to argue beyond/impossible meat is necessarily healthy, but these two brands (currently leading the artificial meat market) contain j

First off, no one is going to argue beyond/impossible meat is necessarily healthy, but these two brands (currently leading the artificial meat market) contain just a small percentage of the isoflavones content found in soy-based products like tofu. Moreover, the negative late-life cognitive effects ("brain shrinkage") referenced by your second source are just as likely correlated to a lack of B12 and DHA (both vital for brain health) not present naturally in soy but are easily supplemented via other plant-based sources. In fact, lots of modern tofu products are enriched with one or both. The uncontested health benefits of tofu when compared to meat far outweigh the single flimsy correlational 30-year study concluding "tofu shrinks your brain!". Also just worth noting, you cite four references showing negative effects of isoflavones on the brain, but 4 is about thyroid health, 5 is about reproductive health.