A form of calcium

Calcium gluconate supplements

283 calcium products in the NIH label database list calcium as calcium gluconate (1% of the 19,724 calcium products); their median is 250 mg of calcium per serving, against 115 mg across all calcium products (DSLD version 9.4.0, January 2026).

How does calcium gluconate compare with the other forms?

The median amount of calcium per serving in products naming each form; the count in brackets. The amount is the calcium the label gives, as printed (the Supplement Facts row normally states the element; a row named as the compound usually gives the compound's weight and is left out of these figures).

Median calcium per serving by form

Calcium by formCalcium carbonate200 mg (4,133)Calcium phosphate108 mg (2,838)Calcium citrate200 mg (2,770)Calcium malate200 mg (681)Calcium lactate75 mg (343)Calcium gluconate250 mg (283)Calcium hydroxyapatite500 mg (270)
Calcium by formCalcium carbonate200 mg (4,133)Calcium phosphate108 mg (2,838)Calcium citrate200 mg (2,770)Calcium malate200 mg (681)Calcium lactate75 mg (343)Calcium gluconate250 mg (283)Calcium hydroxyapatite500 mg (270)
Calcium by formCalcium carbonate200 mg (4,133)Calcium phosphate108 mg (2,838)Calcium citrate200 mg (2,770)Calcium malate200 mg (681)Calcium lactate75 mg (343)Calcium gluconate250 mg (283)Calcium hydroxyapatite500 mg (270)
Calcium by formCalcium carbonate200 mg (4,133)Calcium phosphate108 mg (2,838)Calcium citrate200 mg (2,770)Calcium malate200 mg (681)Calcium lactate75 mg (343)Calcium gluconate250 mg (283)Calcium hydroxyapatite500 mg (270)
Calcium by formCalcium carbonate200 mg (4,133)Calcium phosphate108 mg (2,838)Calcium citrate200 mg (2,770)Calcium malate200 mg (681)Calcium lactate75 mg (343)Calcium gluconate250 mg (283)Calcium hydroxyapatite500 mg (270)

Source: Supplement Facts rows and their forms, NIH ODS Dietary Supplement Label Database version 9.4.0, current labels.

Products
283207 on the market
Median calcium per serving
250 mgall calcium products: 115 mg
Share of calcium products
1%283 of 19,724

Is the amount the calcium or the whole calcium gluconate?

A Supplement Facts row normally states the calcium itself (a row like "Calcium (as calcium gluconate)"); a row named as the compound (a row like "Calcium gluconate") usually states the compound's weight, which includes what the calcium is bound to and is larger than the calcium it supplies. The front of a bottle may print either. Of the 283 products here, 279 give the calcium in its own row (7 of them an amount far outside what other labels list, or one their own %DV disagrees with); 4 give no amount of their own or one in another unit.

The adult Tolerable Upper Intake Level for calcium is 2,500 mg a day; it covers total intake, adults 19-50, 2,000 mg from 51 years. At the most servings their labels direct, 3 of the 272 calcium gluconate products with a plausible amount (1.1%) give more than that.

Source: Supplement Facts rows of each product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; upper limit: Institute of Medicine Dietary Reference Intakes (2011) (what counts as plausible).

What else do these products contain?

Ingredients most often listed alongside it, with the median amount in these products and in all products
IngredientShare of these productsMedian hereMedian, all products
Magnesium90% 133 mg86 mg
Vitamin D63% 10 mcg15 mcg
Zinc48% 10 mg11 mg
Vitamin C42% 200 mg100 mg
Potassium42% 50 mg99 mg
Vitamin B640% 10 mg6 mg
Vitamin B1240% 15 mcg36 mcg
Niacin39% 20 mg20 mg
Riboflavin38% 5 mg4 mg
Thiamin38% 5 mg5 mg

Which products are they?

60 of the 283 (on-market products first, the newest label first), ordered by the amount of calcium per serving, largest first; an amount that looks like a slip or a compound's weight comes last, marked.

Source: NIH ODS Dietary Supplement Label Database version 9.4.0; the form each label names for its row. Daily Values: the FDA's Daily Value page.

Which brands make them?

Detoxify (21), SaltStick (20), Nature's Plus (14), Viva Vitamins (11), Douglas Laboratories (9), FITAID (9), Natural Vitality (8), Labrada (8), Nutri-West (6), Vitamin World (5).

Where next?