Calcium carbonate
A concentrated and widely used calcium source selected to provide the mineral foundation needed for the maintenance of normal bones and teeth.


Reliable calcium and vitamin D3 support for maintaining strong bones, normal muscle function and efficient calcium absorption.
Calcin is available by prescription and is intended to be used as directed by your healthcare professional. This guide explains the nutritional thinking behind the formula, helping you feel informed and confident about the product selected for your care.
Every active component has a defined place in the formula. Together, they provide broader and more complementary nutritional support than a single-ingredient approach.
Amounts transcribed from the supplied pack. Always check the current physical label before use.
Your prescriber can assess how this combination fits your individual needs. Here is the purpose each active ingredient brings to the complete formula.
A concentrated and widely used calcium source selected to provide the mineral foundation needed for the maintenance of normal bones and teeth.
Delivers 400 mg of usable elemental calcium per tablet to support normal muscle function, nerve signalling and bone mineral maintenance.
Helps the body absorb and use calcium effectively, supporting normal blood calcium levels, bone maintenance and muscle function.
The formulation brings complementary ingredients together so that structural nutrients, established vitamin functions and carefully selected supporting compounds contribute to one coherent purpose.
Each tablet provides 400 mg of elemental calcium, the body’s most abundant mineral and a primary structural component of bones and teeth.
Vitamin D3 helps the body absorb calcium and supports normal bone mineralisation. Pairing the two nutrients makes Calcin a practical option when diet, life stage or professional advice identifies a need.
Calcium also contributes to normal muscle contraction, nerve transmission and blood clotting, so adequate intake supports several everyday body functions.
If your healthcare professional has prescribed Calcin, each ingredient has been brought together to provide a specific and complementary form of nutritional support. Follow the prescribed directions and ask your doctor or pharmacist if you would like advice specific to your treatment plan.
Vitamin D alone showed no reduction; pooled calcium plus vitamin D trials suggested small reductions.
No clear benefit in community-dwelling adults without known deficiency or osteoporosis; kidney stones increased slightly with combined supplementation.
NIH Office of Dietary Supplements · NIH Office of Dietary Supplements
Use only as prescribed by your healthcare professional. Do not change the recommended use without speaking to your prescriber.