Shell Calcium
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What it is
Shell calcium is a source of calcium derived from the shells of marine animals, such as oysters or clams. The shells are cleaned, ground into a fine powder, and often processed to remove impurities. This process results in a calcium supplement that can be used in food products.
Why it's used
Shell calcium is added to foods as a source of calcium, acting as a nutrient fortification. It is commonly found in products where calcium enrichment is desired, such as certain snack foods, crackers, and baked goods. Its neutral flavor and fine texture make it suitable for incorporation into a variety of food items without significantly altering their taste or texture.
Health notes
In the U.S., calcium derived from shells is generally recognized as safe (GRAS) by the FDA when used as a nutrient supplement. Regulatory bodies like JECFA and EFSA have evaluated calcium compounds for safety. At typical dietary intake levels, calcium is essential for bone health. Research on the bioavailability and absorption of calcium from shell sources is ongoing.
Allergen info
Shell calcium is derived from shellfish, which is one of the nine FDA major allergens. Therefore, products containing shell calcium may not be suitable for individuals with shellfish allergies.