Why stomach acid and digestive enzymes matter with vitamins and minerals including iron, calcium and B12 Did you know that humans are meant to have a very acidic stomach, with a pH of 1.0-2.0 making it much more similar to a scavenging crow than a cow chewing grass! This stomach acid (which is hydrochloric acid, or HCI) is essential to not only digestive health but the absorption and activation of vitamins and minerals such as B12, iron, calcium and magnesium! 

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