What zinc sulphate monohydrate is
Zinc sulphate monohydrate is the zinc salt supplement makers use to get the mineral into a tablet. The body cannot make zinc, so it has to come from food such as meat, shellfish, dairy, nuts and beans, and it is needed for normal growth, immune defences and skin repair. When intake runs low, wounds heal slowly, taste and smell dull and infections hit harder. A supplement fills the gap when diet alone does not.
The "monohydrate" part is a detail of how the salt is made and weighed: each unit carries one molecule of water. It does not change what the zinc does once it is swallowed.
Calcibrook Forte: three minerals in one tablet
In this shop the zinc comes in one place: Calcibrook Forte, a tablet pairing it with calcium carbonate 1000mg and magnesium hydroxide 240mg, with the zinc sulphate monohydrate at 11mg. The strength 1000/240/11mg reads in that order, calcium largest and zinc smallest. Its stated use is calcium deficiency and bone health, and you will find it under bone support. Zinc, calcium and magnesium are all found in bone, which is why they are often grouped in one supplement.
Taking it, and the side effects to expect
Have the tablet during a meal, swallowed with water. Food helps the calcium carbonate absorb, and zinc swallowed on an empty stomach is more likely to bring on nausea, so mealtimes suit both.
Mild stomach upset is the usual complaint with oral zinc: nausea, indigestion, a metallic taste, and sometimes constipation or wind. These are rarely serious. Severe, persistent stomach pain, or swelling of the face, lips or throat with difficulty breathing, needs urgent treatment.
Zinc and other medicines
Zinc in the gut binds to some other medicines and reduces how much the body takes up. Tetracycline antibiotics such as doxycycline and quinolone antibiotics are the main ones. The calcium and magnesium in the tablet do the same to bisphosphonates, the medicines taken to strengthen bone, and iron supplements compete with zinc for absorption. Keep a gap of a few hours between the mineral tablet and any of these.