"Vitamins and Minerals "-calcium, carbonate, tricalcium phosphate, zinc and iron ( mineral nutrients ), vitamin C ( sodium ascorbate ), B vitamin ( niacinamide ), vitamin B6 ( pyridoxine hydrochloride ), vitamin B2 ( riboflavin ), vitamin B1 ( thiamin mononitrate ), vitamin A ( palmitate ), B vitamin ( folic acid ), vitamin B12, vitamin D.
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These invertebrates are more frequently preserved because their hard parts for example, tests, exoskeleton, jaws or teeth-- are composed of silica ( silicon dioxide ), calcite or aragonite ( both forms of calcium carbonate ), chitin ( a protein often infused with tricalcium phosphate ), or keratin ( an even-more complex protein ), rather than the vertebrate bone ( hydroxyapatite ) or cartilage of fishes and land-dwelling tetrapods.
