Quest Cal-Mag Plus multiminerals have a balanced ratio of calcium and magnesium (1:1) to support bone health and muscle function. They contain 11 essential minerals and use amino acid chelation - which creates a gentle ‘iron’ formulation that will not cause constipation. Quest Cal-Mag Plus Multiminerals also contains zinc. Low zinc is associated with lowered immunity, poor skin condition and loss of appetite. Suitable for vegetarians and vegans.