Since magnesium content isn’t always listed, I want to be sure I’m buying the right frozen spinach. I worry some cooked/frozen spinach has been stripped of its nutritional content. Are there certain processing methods I should find or certain brands that have more magnesium?
It’s extremely unlikely that manufacturers are processing frozen spinach in different ways. A batch blanch/steam & an IQF steaming tunnel is pretty much standard.
Also, nutritional labeling content for this sort of thing is fairly standardized. It’s not like companies are sending out there frozen spinach for nutritional analysis. It’s basically the same regardless of supplier
No. It doesn’t work like that. If anything, variability may relate to where it was grown and the soil quality, but there’s not really any way to know that unless you have a food science lab set up in your kitchen.