PlainVitamins

OsCal Pro

by Guardian Health · capsule · 120 capsules

  • On the market (NIH)
  • UPC 8 18174 02037 9
  • DSLD label 299125
  • Serving 4 capsules
  • 30 servings

OsCal Pro by Guardian Health lists 7 ingredients, 7 with an amount per serving of 4 capsules, such as 400 mg of calcium, 27 mcg (1,080 IU) of vitamin D3, 64 mcg of vitamin K2 and 164 mg of phosphorus. Its current label entered the NIH Dietary Supplement Label Database on November 22, 2023.

What is in OsCal Pro?

Each row as the label prints it, per serving of 4 capsules. 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).

OsCal Pro: Supplement Facts rows against the market (DSLD label 299125, January 2026 release)
IngredientAmount% DVAmong products listing it
Calciumas MCH-Cal400 mg31%Calcium in OsCal Pro against 17,831 products400 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg400 mg

Higher than 82% of 17,831 products listing calcium (median 115 mg).

Vitamin D3as Cholecalciferol1080 IU27 mcg (1,080 IU)135%Vitamin D in OsCal Pro against 14,175 products27 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg27 mcg

Higher than 76% of 14,175 products listing vitamin D (median 15 mcg).

Vitamin K2as Menaquinone-764 mcg53%Vitamin K in OsCal Pro against 4,607 products64 mcg per serving; the middle half of products list 35 mcg to 100 mcg, the median 80 mcg.DV 120 mcg64 mcg

55% of 4,607 products listing vitamin K give more (median 80 mcg).

Phosphorusas MCH-Cal164 mg13%Phosphorus in OsCal Pro against 3,786 products164 mg per serving; the middle half of products list 45 mg to 200 mg, the median 90 mg.DV 1,250 mgUL 4,000 mg164 mg

Higher than 71% of 3,786 products listing phosphorus (median 90 mg).

Magnesiumas Magnesium Oxide200 mg48%Magnesium in OsCal Pro against 14,003 products200 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg200 mg

Higher than 75% of 14,003 products listing magnesium (median 86 mg).

Boronas Boron Citrate100 mcgBoron in OsCal Pro against 3,339 products0.1 mg per serving; the middle half of products list 0.3 mg to 2 mg, the median 1 mg.UL 20 mg0.1 mg

92% of 3,339 products listing boron give more (median 1 mg).

Cissus quadrangularis extractas PhytosterolsNLT 2.5% Phytosterols150 mgCissus quadrangularis in OsCal Pro against 140 products150 mg per serving; the middle half of products list 100 mg to 800 mg, the median 400 mg.150 mg

63% of 140 products listing cissus quadrangularis give more (median 400 mg).

Source: NIH ODS Dietary Supplement Label Database, label 299125 (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:

  • 92% of the 3,339 products that print an amount of boron list more than its 0.1 mg of boron (median 1 mg).

The NIH database records one serving 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 OsCal Pro'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
Suggested Use: As a dietary supplement, take 4 capsules per day, preferably with a low fiber meal or before sleep.
Warnings
Keep out of reach of children.
Warning: If you are pregnant, lactating, or have serious medical condition, you should not use this product before consulting a physician.
Storage
Store in a cool dry place below 30 degrees C (86 degrees F) and avoid exposure to sunlight.

Source: label statements in DSLD label 299125.

What else is on the label?

Other ingredients: Brown Rice Flour, Magnesium Stearate, Silicon Dioxide, Dicalcium Phosphate, Maltodextrin, Water.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Made In USA With Globally Sourced Ingredients.

How many labels does OsCal Pro have?

One label is on file, entered on November 22, 2023.

  1. Label 299125 (current) Entered November 22, 2023 · on the market · 120 capsules · UPC 8 18174 02037 9

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

Who makes it?

The label names Guardian Health, Inc. (distributor), City of Industry, CA. All Guardian Health products.

Where next?