Tag: Chalk composition

Despite its recognizable texture and common use, chalk is not a food product and contains no protein. The primary component of natural chalk is calcium carbonate, an inorganic mineral derived from the fossilized remains of microscopic marine organisms.

Over 90 million years ago, what we now call chalk was ooze accumulating on ancient sea beds from the shells of microorganisms. While primarily composed of calcium carbonate, chalk lacks meaningful nutritional value for humans and is not intended for consumption. Cravings for chalk may indicate an underlying medical issue, such as the eating disorder pica, and pose significant health risks if ingested.