PlainVitamins

OPC-3 (Oligomeric Proanthocyanidins)

by DNA Miracles Isotonix · powder · 10.6 ounces

  • On the market (NIH)
  • UPC 8 48570 00223 5
  • DSLD label 298859
  • Serving 3.3 g (1 Capful, Children ages 2-3)
  • 45 servings

OPC-3 (Oligomeric Proanthocyanidins) by DNA Miracles Isotonix lists 12 ingredients, 12 with an amount per serving of 3.3 g, such as 100 mg of vitamin C, 5 mcg (200 IU) of vitamin D3, 11 mg of vitamin E and 75 mcg of biotin, beside 2 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 OPC-3 (Oligomeric Proanthocyanidins)?

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).

OPC-3 (Oligomeric Proanthocyanidins): Supplement Facts rows against the market (DSLD label 298859, January 2026 release)
IngredientAmount% DVAmong products listing it
Total Carbohydratesless than 1 g1%
Total Sugarsless than 1 g
Vitamin Cas Ascorbic Acid100 mg667%Vitamin C in OPC-3 (Oligomeric Proanthocyanidins) against 18,583 products100 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg100 mg

50% of 18,583 products listing vitamin C give more (median 100 mg).

Vitamin D3as Cholecalciferol5 mcg (200 IU)33%Vitamin D in OPC-3 (Oligomeric Proanthocyanidins) against 14,175 products5 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg5 mcg

83% of 14,175 products listing vitamin D give more (median 15 mcg).

Vitamin Eas D-Alpha-Tocopheryl Acetate11 mg183%
Biotin75 mcg938%Biotin in OPC-3 (Oligomeric Proanthocyanidins) against 9,447 products75 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg75 mcg

68% of 9,447 products listing biotin give more (median 200 mcg).

Calciumas Calcium Lactate200 mg29%Calcium in OPC-3 (Oligomeric Proanthocyanidins) against 17,831 products200 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg200 mg

Higher than 64% of 17,831 products listing calcium (median 115 mg).

Magnesiumas Magnesium Carbonate75 mg94%

This amount is far outside what other labels list for magnesium, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD.

Potassiumas Potassium Bicarbonate50 mg2%Potassium in OPC-3 (Oligomeric Proanthocyanidins) against 11,614 products50 mg per serving; the middle half of products list 50 mg to 190 mg, the median 99 mg.DV 4,700 mg50 mg

72% of 11,614 products listing potassium give more (median 99 mg).

Pycnogenolas Pine Bark Extract20 mgMaritime Pine in OPC-3 (Oligomeric Proanthocyanidins) against 215 products20 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.20 mg

76% of 215 products listing maritime pine give more (median 50 mg).

Grape Seed Extract12.5 mgGrape in OPC-3 (Oligomeric Proanthocyanidins) against 1,900 products12.5 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.12.5 mg

85% of 1,900 products listing grape give more (median 50 mg).

Red Wine extract12.5 mgRed Wine in OPC-3 (Oligomeric Proanthocyanidins) against 115 products12.5 mg per serving; the middle half of products list 25 mg to 90 mg, the median 25 mg.12.5 mg

80% of 115 products listing red wine give more (median 25 mg).

Bilberry Extract12.5 mgBilberry in OPC-3 (Oligomeric Proanthocyanidins) against 896 products12.5 mg per serving; the middle half of products list 20 mg to 100 mg, the median 50 mg.12.5 mg

84% of 896 products listing bilberry give more (median 50 mg).

Citrus Extract Bioflavonoid Complex12.5 mg
Hyaluronic Acidas Sodium Hyaluronate7.5 mgHyaluronic acid in OPC-3 (Oligomeric Proanthocyanidins) against 900 products7.5 mg per serving; the middle half of products list 10 mg to 100 mg, the median 50 mg.7.5 mg

77% of 900 products listing hyaluronic acid give more (median 50 mg).

Source: NIH ODS Dietary Supplement Label Database, label 298859 (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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

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 OPC-3 (Oligomeric Proanthocyanidins)'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: children 2 and 3 years of age: Poor 1 level, white bottle capful of powder into the overcap. Add water to the line on the overcap (2 fl oz/60ml) and stir. Take once daily or as directed by your healthcare provider. Adults and children 4 years of age and older: take 2 capfuls daily, or as directed by your healthcare provider.
Warnings
Keep out of reach of children.
Do not use if safety seal is broken or missing.
Resale on third-party websites is strictly prohibited unless specifically authorized by Market America or its corporate affiliates. If barcodes are altered or you purchase this product from an unauthorized third-party website, the product is not guaranteed by Market America or its corporate affiliates.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 298859.

What else is on the label?

Other ingredients: Citric Acid, Grapefruit Juice, Powder, Malic Acid, Fructose, Raspberry Fruit Juice, Powder, Grape Flavor, Natural, Raspberry Flavor, Natural, Grape Skin Extract, Rebaudioside A, Silicon Dioxide, Luo Han Guo fruit extract, Stearic Acid, Maltodextrin.

How many labels does OPC-3 (Oligomeric Proanthocyanidins) have?

2 labels are on file under this name since June 24, 2019: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 298859 (current) Entered November 22, 2023 · on the market · 10.6 ounces · UPC 8 48570 00223 5
  2. Label 204269 Entered June 24, 2019 · off the market November 30, 2022 · 300 grams · UPC 8 48570 00223 5

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 DNA Miracles Isotonix products.

Where next?