I randomly happened to look at the nutrition info on the can sitting in my fridge and it says 0% for calcium. Isn't tahini supposed to be a semi okay source of calcium? I know it probably varies by brand, but none at all seems odd. I wondered if maybe it was some kind of labeling weirdness, like it had to be a specific amount or something to be listed. I checked the labels online for a couple other brands I've had in the past and they both have 4% of the daily value for the same size serving. Does anybody know what gives?