FWIW, there is no difference between vegetative occuring nitrites or nitrates and store bought nitrites or nitrates... Nitrites and nitrates are naturally occuring ..... It's a gimmic so some folks have a "feel good" moment... If you add 1.1 grams of nitrite to a pound of meat, whether it be celery or store bought, the results are the same, maybe... at least you have the satisfaction of knowing exactly how much nitrite you are adding.... Adding 0.25% cure#1 gives a USDA accepted nitrite protection of 156 Ppm nitrite....
In the Sausage Maker explanation, they acknowledge they don't know how much you are adding...
Recommended usage: 0.45% - 0.9% Celery Juice Powder of total weight of ground meat will bring sausage to 100 - 200ppm nitrite
*The USDA currently does not recognize naturally occurring nitrates as effective curing agents in meats, so if using Celery Juice Powder for products being sold to the public, the end-products must be labeled "Uncured".