PlainVitamins

C-500 Plus

by Altrum · capsule · 100 capsules

  • On the market (NIH)
  • DSLD label 232941
  • Serving 1 veg capsule

C-500 Plus by Altrum lists 3 ingredients, 3 with an amount per serving of 1 veg capsule, such as 500 mg of vitamin C, 55 mg of calcium and 10 mg of citrus bioflavonoid complex. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2020.

What is in C-500 Plus?

Each row as the label prints it, per serving of 1 veg capsule. 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).

C-500 Plus: Supplement Facts rows against the market (DSLD label 232941, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Calcium AscorbateVitamin C (Form: from Calcium Ascorbate)500 mg556%Vitamin C in C-500 Plus against 18,583 products500 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg500 mg

Higher than 81% of 18,583 products listing vitamin C (median 100 mg). Per day at the most servings: 1,500 mg.

Calciumas Calcium AscorbateCalcium (Form: from Calcium Ascorbate)55 mg4%Calcium in C-500 Plus against 17,831 products55 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg55 mg

71% of 17,831 products listing calcium give more (median 115 mg). Per day at the most servings: 165 mg.

Citrus Bioflavonoid Complex10 mgFlavonoid in C-500 Plus against 2,343 products10 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.10 mg

89% of 2,343 products listing flavonoid give more (median 50 mg). Per day at the most servings: 30 mg.

Source: NIH ODS Dietary Supplement Label Database, label 232941 (entered August 23, 2020), version 9.4.0. See the label on DSLD. 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:

  • 89% of the 2,343 products that print an amount of flavonoid list more than its 10 mg of citrus bioflavonoid complex (filed by NIH under flavonoid) (median 50 mg).

The NIH database records 1 to 3 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?

6 products list the very same ingredients; the nearest amounts come first.

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
Suggested Usage: Take 1 capsule 1 to 3 times daily.
Warnings
Caution: For adults only.
Consult physician if pregnant/nursing, taking medication, or have a medical condition.
Keep out of reach of children.
Produced in a GMP facility that processes other ingredients containing these allergens.
Allergens and what it does not contain
Non-GMO
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.
Storage
Store in a cool, dry place after opening.

Source: label statements in DSLD label 232941.

What else is on the label?

Other ingredients: Hypromellose, Microcrystalline Cellulose, Stearic Acid.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP.

How many labels does C-500 Plus have?

One label is on file, entered on August 23, 2020.

  1. Label 232941 (current) Entered August 23, 2020 · on the market · 100 capsules

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

Who makes it?

The label names ALTRUM Nutrition Div. of AMSOIL, INC. (distributor), Superior, WI. All Altrum products.

Where next?