I've always bought the flat matrix patches so I could cut them into pieces — worked well for keeping things in limits. If it works for you this is good to hear of course – I wanted to share my2c of skepticism since for above reasons I was suspicious about the hype around it. Btw, if you google a bit deeper you will find a 2020 trial on clinical personell wearing the patches since there were signs it reduces covid infections, so there were early signs that nicotine might help.

As for nattokinase, I'd recommend looking around for diverse real-life experiences (I believe actual studies on long-COVID patients are still lacking). I'm not up to date, but I remember many people went straight for (Amazon-sourced) nattokinase supplements, and for some, it was too much and it made them feel ill.

Otherwise (not sure whether this would deliver the therapeutic dose you might need) natto itself makes a good breakfast — traditionally on rice with a runny egg, but it works as beans on toast too. Good Asian markets carry it in their freezers, imported directly from Japan (buy the versions with soy sauce / mustard). I had it regularly while I was over there, and there’s no difference in taste or effect (comparable to a small dose of aspirin). To the best of my knowledge, deep freezing isn’t an issue with the ingredients.