Great stuff as usual. Made me start thinking in the reaction chain and various formats and some gaps for me in what you talked about. And this also creates question: The plasma bioavailability of nitrate and betanin from Beta vulgaris rubra in humans - PMC which says: “However, betanin, the major betalain in beetroot, showed poor bioavailability in plasma.” I know you focused on the nitrate chain.
You gave a mmol piece of information but you didn’t say what that equates to in the amount of beets you eat/juice to get there. And of course all the “packaged” supplements (that is the title, not performance enhancing food 
) tout their massive number of beets packed into their dose. I can see where those work as a beverage but if I followed correctly something that is passing me nitrates in a capsule form is going to skip the transformation to nitrite transformation.
So my call is for putting the information you presented into a consumption amount and what to look at in supplements if you don’t happen to like beets, etc. That is where we are all “wasting” tons of money. The article I sited above had control subjects at 250ml of juice or 300g of beets. thanks for presenting and listening.
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