Calcium and Magnesium Supplements

Why calcium and magnesium together

The two minerals are partners: calcium supports bones and teeth, while magnesium supports normal muscle and nerve function and helps the body absorb and use calcium. Many formulas add vitamin D and K2 — D for calcium absorption, K2 to direct calcium toward bone. Common ratios are 2:1 or 1:1 (calcium:magnesium); the right one depends on what you already get from diet and other supplements.

Forms and what to look for

• Tablets & capsules — a fixed, convenient ratio for consistent daily intake.
• Liquids — easy to take and adjust (e.g. SISU, Genestra, Salus); good if you dislike large tablets.
• Powders — mix into a drink; flexible dosing.
• With D3 & K2 — for absorption and bone support; many cal-mag formulas include them.
• Coral & marine calcium — see coral calcium and liquid calcium.

For magnesium on its own and its different forms, see magnesium (including bisglycinate). Calcium also supports the collagen framework of bone.

Calcium & magnesium in Canada

These supplements sold in Canada carry a Natural Product Number (NPN) from Health Canada and ship from our Ontario warehouse to addresses across Canada.

A note on calcium and magnesium

Take only what you need — more isn't better, especially with calcium, where very high supplemental doses aren't recommended. Calcium can interfere with the absorption of some medications and other minerals (like iron), so space them apart. Magnesium can have a laxative effect at higher doses. If you have kidney issues, take medication, or are pregnant or breastfeeding, check with your healthcare provider before use.