<s>[INST] Are all calcium supplements the same? [/INST] No; they vary in composition and the amount of calcium they contain. Different calcium formulations are available – calcium carbonate, calcium lactate gluconate, calcium pidolate and calcium citrate, amongst others.  Source: Clinic Barcelona. Link: https://www.clinicbarcelona.org/en/assistance/diseases/osteoporosis/frequently-asked-questions. Field: Rheumatology. Disease: Ostoeporosis </s>