You may want additional acid too, but I'll leave that up to you! (yupitsvegan.com)
I tested two chocolate cakes; the first called for baking powder, a mix of baking soda and acidic cream of tartar that, when hydrated and heated, leavens baked goods all on its own without the need of additional acids. (seriouseats.com)
It's a simple, effective and affordable way to see how your body reacts with additional acid, weaning out the possibility of a sensitive or thinning stomach lining, or ulcers that might be present, as this is when you do NOT want to be taking supplemental HCL. (wiserootsnutrition.com)