With my wife, we consume calcium quotidennement at Nature's Aid (either with zinc or with vitamin D3). It is recommended to take 2 tablets / day (each box containing 90). This helps us to stand firm against fatigue, and keep fit. We spend our orders with VITAMINS UK, and have always been pleased with their services (including when we were contacted by email). Sending is neat and the products are of high quality. To consume without problem!