In terms of nutritional value, traditional brewed black coffee will either have very little food value or nothing at all. In the majority of the cases, when you check a coffee nutrition label, you will either find zero or up to a maximum of 2 calories for a serving of black coffee. Nitrogen gas is inert and also lacks any nutritional value, so there is no noticeable nutritional increase in nitro cold brew verse straight brewed black coffee. However, minor variations may exist between coffee varieties depending on how dark the coffee has been roasted, where it’s origin is from and what the density is of the final brew