Animal feed additives; calcium supplements; dietary supplements for general health and well-being; feed additives for veterinary preparations; nutritional supplements for animal feed; nutritional supplements for general health and well-being; pharmaceutical preparations for the prevention of osteoporosis; animal feed supplements; nutritional supplements to treat joint pain; calcium derived from eggshells used as a dietary supplement; calcium derived from eggshells for use as an ingredient in dietary supplements and nutraceuticals; eggshell membrane derivatives used as a dietary supplement; eggshell membrane derivatives for use as an ingredient in dietary supplements and nutraceuticals; collagen, glucosamine, chondroitin, hyaluronic acid, and calcium derived from eggshells and eggshell membranes used as a dietary supplement, and for use as ingredients in dietary supplements and nutraceuticals, for human use and for veterinary use; collagen, glucosamine, chondroitin, hyaluronic acid, and calcium derived from eggshells and eggshell membranes used as an ingredient in cosmetics; eggshell membrane derivatives for use as an ingredient in cosmetics; dietary supplements for joint, bone, coat and skin health in household pets; calcium derived from eggshells used as a dietary supplement for cats and dogs, and for use as an ingredient in dietary supplements for cats and dogs; eggshell membrane derivatives used as a dietary supplement for cats and dogs, and for use as an ingredient in dietary supplements for cats and dogs