PlainVitamins

Isotonix OPC-3 (Oligomeric Proanthocyanidins)

by Might-A-Mins Spectrum · powder · 10.5 oz.

  • On the market (NIH)
  • DSLD label 8176
  • Serving 3.3 g (1 capful)
  • 90 servings

Isotonix OPC-3 (Oligomeric Proanthocyanidins) by Might-A-Mins Spectrum lists 13 ingredients, 13 with an amount per serving of 3.3 g, such as 100 mg of vitamin C, 200 IU (5 mcg) of vitamin D3, 16.5 IU 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 April 26, 2012.

What is in Isotonix 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).

Isotonix OPC-3 (Oligomeric Proanthocyanidins): Supplement Facts rows against the market (DSLD label 8176, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories0 Calories
Total Carbohydratesless than 1 g
Sugarless than 1 g
Vitamin Cas Ascorbic Acid100 mg167%Vitamin C in Isotonix 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 Cholecalciferol200 IU (5 mcg)50%Vitamin D in Isotonix 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 Acetate16.5 IU55%Vitamin E in Isotonix OPC-3 (Oligomeric Proanthocyanidins) against 6,459 products16.5 IU per serving; the middle half of products list 15 IU to 100 IU, the median 30 IU.16.5 IU

74% of 6,459 products listing vitamin E give more (median 30 IU).

Biotin75 mcg25%Biotin in Isotonix 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 mg20%Calcium in Isotonix 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 mg19%Magnesium in Isotonix OPC-3 (Oligomeric Proanthocyanidins) against 14,003 products75 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg75 mg

52% of 14,003 products listing magnesium give more (median 86 mg).

Potassiumas Potassium Bicarbonate50 mg1%*Potassium in Isotonix 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).

Pine bark extract20 mgPine in Isotonix OPC-3 (Oligomeric Proanthocyanidins) against 220 products20 mg per serving; the middle half of products list 25 mg to 180 mg, the median 83 mg.20 mg

75% of 220 products listing pine give more (median 83 mg).

Grape seed extract12.5 mgGrape in Isotonix OPC-3 (Oligomeric Proanthocyanidins) against 1,900 products25 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.25 mg

69% of 1,900 products listing grape give more (median 50 mg).

Grape skin extract12.5 mg
Bilberry extract12.5 mgBilberry in Isotonix 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 Bioflavonoids12.5 mgCitrus in Isotonix OPC-3 (Oligomeric Proanthocyanidins) against 69 products12.5 mg per serving; the middle half of products list 28 mg to 200 mg, the median 85 mg.12.5 mg

90% of 69 products listing citrus give more (median 85 mg).

Hyaluronic Acidas Sodium Hyaluronate7.5 mgHyaluronic acid in Isotonix 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).

* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.

Source: NIH ODS Dietary Supplement Label Database, label 8176 (entered April 26, 2012), 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:

  • 90% of the 69 products that print an amount of citrus list more than its 12.5 mg of citrus (median 85 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 Isotonix 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: Ages 2-3: Pour 1 level, white bottle capful of powder into the overcap. Add water to the line on the overcap (2 fl. oz./60 mL) and stir. Take once daily or as directed by your healthcare provider. Ages 4 and older: Take 2 capfuls daily. Maximum absorption occurs when taken on an empty stomach. This product is isotonic only if the specified amounts of powder and water are used.
Warnings
Warning: If you are using prescription drugs, have an ongoing medical condition, or if you are pregnant or breastfeeding, you should consult your healthcare provider before using this product.
KEEP OUT OF THE REACH OF CHILDREN.
Do not use if safety seal is broken or missing.
Allergens and what it does not contain
This product contains no added wheat, soy, yeast, gluten, artificial flavor, starch, salt, preservatives or milk.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 8176.

What else is on the label?

Other ingredients: Citric Acid, grape juice powder, Malic Acid, Fructose, Grape flavor, raspberry juice powder, grape skin extract, Raspberry flavor, rebaudioside A, Silicon Dioxide, Lo Han extract, Maltodextrin.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): PYCNOGENOL(R) (Pine Trees) NATURES SUPER ANTIOXIDANT.

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

One label is on file, entered on April 26, 2012.

  1. Label 8176 (current) Entered April 26, 2012 · 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 Might-A-Mins Spectrum products.

Where next?