PlainVitamins

Calcium Plus

by Isotonix · powder · 10.6 ounces

  • On the market (NIH)
  • UPC 8 48570 00627 1
  • DSLD label 298813
  • Serving 3.3 g (1 capful)
  • 90 servings

Calcium Plus by Isotonix lists 8 ingredients, 8 with an amount per serving of 3.3 g, such as 29 mg of vitamin C, 13 mcg (520 IU) of vitamin D3, 2 mg of riboflavin and 375 mg of calcium, beside 3 Nutrition Facts rows (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on November 22, 2023.

What is in Calcium Plus?

Each row as the label prints it, per serving of 3.3 g. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Calcium Plus: Supplement Facts rows against the market (DSLD label 298813, January 2026 release)
IngredientAmount% DVAmong products listing it
Total Carbohydrates0 g0%
Total Sugars0 g
Vitamin Cas Ascorbic Acid29 mg32%Vitamin C in Calcium Plus against 18,583 products29 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg29 mg

88% of 18,583 products listing vitamin C give more (median 100 mg). Per day at the most servings: 58 mg.

Vitamin D3as Cholecalciferol13 mcg (520 IU)65%Vitamin D in Calcium Plus against 14,175 products13 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg13 mcg

53% of 14,175 products listing vitamin D give more (median 15 mcg). Per day at the most servings: 26 mcg.

Riboflavinas Riboflavin 5-Phosphate2 mg154%Riboflavin in Calcium Plus against 9,824 products2 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg2 mg

60% of 9,824 products listing riboflavin give more (median 4 mg). Per day at the most servings: 4 mg.

Calciumas Calcium Carbonate, Calcium Citrate, Calcium Lactate375 mg29%Calcium in Calcium Plus against 17,831 products375 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg375 mg

Higher than 82% of 17,831 products listing calcium (median 115 mg). Per day at the most servings: 750 mg.

Magnesiumas Magnesium Carbonate, Magnesium Oxide100 mg24%Magnesium in Calcium Plus against 14,003 products100 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg100 mg

Higher than 51% of 14,003 products listing magnesium (median 86 mg). Per day at the most servings: 200 mg.

Manganeseas Manganese Sulfate0.5 mg22%Manganese in Calcium Plus against 7,016 products0.5 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg0.5 mg

86% of 7,016 products listing manganese give more (median 2 mg). Per day at the most servings: 1 mg.

Sodiumas Sodium Bicarbonate5 mg1%Sodium in Calcium Plus against 14,514 products5 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.5 mg

89% of 14,514 products listing sodium give more (median 55 mg). Per day at the most servings: 10 mg.

Potassiumas Potassium Bicarbonate, Potassium Citrate110 mg2%Potassium in Calcium Plus against 11,614 products110 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg110 mg

Higher than 57% of 11,614 products listing potassium (median 99 mg). Per day at the most servings: 220 mg.

Boronas Boron Citrate0.5 mgBoron in Calcium Plus against 3,339 products0.5 mg per serving; the middle half of products list 0.3 mg to 2 mg, the median 1 mg.UL 20 mg0.5 mg

65% of 3,339 products listing boron give more (median 1 mg). Per day at the most servings: 1 mg.

Source: NIH ODS Dietary Supplement Label Database, label 298813 (entered November 22, 2023), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • 86% of the 7,016 products that print an amount of manganese list more than its 0.5 mg of manganese (median 2 mg).

The NIH database records 2 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

The products whose ingredient lists overlap most with Calcium Plus's, rare ingredients counting for more.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Directions for use: Pour 1 level, white bottle capful of powder into the overcap. Add water to the line (2 fl oz/60 ml) and stir. As a dietary supplement for adults, this product is best taken twice daily, 1 capful in the morning and 1 capful in the evening, or as directed by your healthcare provider. Maximum absorption occurs when taken on an empty stomach. This product is isotonic only if the specific amounts of powder and water are used.
Warnings
Warning: If you are currently using any prescription drugs, have an ongoing medical condition, or if you are pregnant or breastfeeding, consult your healthcare provider before using this product.
Keep out of reach of children.
Do not use if safety seal is broken or missing.
Allergens and what it does not contain
This vegetarian product contains no added wheat, soy, yeast, gluten, artificial flavor, starch, salt, preservatives or milk.
Gluten free
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 298813.

What else is on the label?

Other ingredients: Citric Acid, Orange Juice, Powder, Malic Acid, natural Orange flavor, Fructose, Rebaudioside A, Passionfruit Flavor, Natural, Glucose, Natural Mango Flavor, Luo Han Guo fruit extract, Silicon Dioxide, natural French Vanilla, Stearic Acid.

How many labels does Calcium Plus have?

3 labels are on file under this name since February 26, 2014: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 298813 (current) Entered November 22, 2023 · on the market · 10.6 ounces · UPC 8 48570 00627 1
  2. Label 215377 Entered March 24, 2020 · off the market November 30, 2022 · 10.6 ozs · UPC 8 48570 00627 1
  3. Label 29951 Entered February 26, 2014 · on the market · 10.5 oz.

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Market America, Inc. (distributor), Greensboro, NC. All Isotonix products.

Where next?