Which vitamins contain magnesium? Check the mineral declaration

The product category is broader than a nutrient name

Vitamin C, vitamin D and the B vitamins are different nutrients from magnesium. A combination tablet can include magnesium alongside vitamins, but magnesium is not hidden inside a vitamin molecule as its nutritional equivalent. Look for a separate magnesium entry on the Supplement Facts panel. [1][2]

Read elemental magnesium per actual serving

ODS explains that the supplement panel declares elemental magnesium, rather than the full weight of its compound. The parenthetical form, such as magnesium citrate, identifies the source. A large compound amount on promotional copy is not necessarily the declared magnesium amount. Serving size can also span more than one tablet. [1]

A hypothetical multivitamin label

Suppose two tablets provide 80 mg magnesium. One tablet contributes 40 mg; adding a separate 100 mg magnesium product makes 140 mg from those supplements. This arithmetic establishes exposure, not whether supplementation is needed. Food, medicines, kidney function and the reason for use remain separate considerations. [1]

Hypothetical example — interpret a specific hypothetical label or comparison
Hypothetical use	Magnesium
One of two tablets in an 80 mg serving	40 mg
That tablet plus100 mg separately	140 mg

Which vitamins contain magnesium? Check the mineral declaration — original article outline diagram — Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

Sources for this article

Magnesium - Health Professional Fact Sheet
Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.
Vitamins: MedlinePlus Medical Encyclopedia
Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.