Cardio-Stolix

by Douglas Laboratories · capsule · 240 vegetarian capsules

  • On the market (NIH)
  • UPC 3 10539 03537 5
  • DSLD label 245225
  • Serving 4 vegetarian capsules
  • 60 servings

Cardio-Stolix by Douglas Laboratories lists 16 ingredients, 15 with an amount per serving of 4 vegetarian capsules, such as 250 mg of vitamin C, 10 mg of vitamin B6, 1,333 mcg of folate and 500 mcg of vitamin B12; 1 sits inside a blend without its own amount. Its current label entered the NIH Dietary Supplement Label Database on April 22, 2021.

What is in Cardio-Stolix?

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

Cardio-Stolix: Supplement Facts rows against the market (DSLD label 245225, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Magnesium Ascorbate, Potassium AscorbateVitamin C (Form: as Magnesium Ascorbate, and Potassium Ascorbate)250 mg278%Vitamin C in Cardio-Stolix against 18,583 products250 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg250 mg

Higher than 68% of 18,583 products listing vitamin C (median 100 mg).

Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl)10 mg588%Vitamin B6 in Cardio-Stolix against 15,277 products10 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg10 mg

Higher than 55% of 15,277 products listing vitamin B6 (median 6 mg).

Folateas Folic Acid1,333 mcg333%Folate in Cardio-Stolix against 7,022 products1,333 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.1,333 mcg

Higher than 98% of 7,022 products listing folate (median 400 mcg).

Folic Acidas Vitamin B9800 mcg
Vitamin B12as MethylcobalaminVitamin B-12 (Form: as Methylcobalamin)500 mcg20,833%Vitamin B12 in Cardio-Stolix against 14,425 products500 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg500 mcg

Higher than 82% of 14,425 products listing vitamin B12 (median 36 mcg).

Calciumas Calcium CitrateCalcium (Form: as Calcium Citrate)50 mg4%Calcium in Cardio-Stolix against 17,831 products50 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg50 mg

72% of 17,831 products listing calcium give more (median 115 mg).

Magnesiumas Magnesium Ascorbate, magnesium taurinateMagnesium (Form: as magnesium taurinate, and magnesium ascorbate)100 mg24%Magnesium in Cardio-Stolix 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).

AmealPeptide Hydrolyzed Caseinas MilkAmealPeptide Hydrolyzed Casein (Form: Milk) Note: providing508 mgCasein in Cardio-Stolix against 50 products508 mg per serving; the middle half of products list 254 mg to 13,680 mg, the median 508 mg.508 mg

48% of 50 products listing casein give more (median 508 mg).

Valyl-Prolyl-Proline5 mg
Isoleucyl-Prolyl-Prolineno amount given
Hawthorn extractas Hyperoside, Vitexin-2-RhamnosideHawthorn extract (Form: standardized to 1.8% Vitexin-2-Rhamnoside, and Hyperoside) PlantPart: leaf and flower250 mgHawthorn in Cardio-Stolix against 589 products250 mg per serving; the middle half of products list 75 mg to 400 mg, the median 200 mg.250 mg

Higher than 57% of 589 products listing hawthorn (median 200 mg).

MegaNatural-BP Grape seed extractas PolyphenolsMegaNatural-BP Grape seed extract (Form: standardized to 90% Polyphenols) PlantPart: seed Genus: Vitis Species: vinifera150 mgGrape in Cardio-Stolix against 1,900 products150 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.150 mg

Higher than 77% of 1,900 products listing grape (median 50 mg).

L-Arginineas L-Arginine HydrochlorideL-Arginine (Form: as L-Arginine HCl)150 mgArginine in Cardio-Stolix against 1,455 products150 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.150 mg

75% of 1,455 products listing arginine give more (median 500 mg).

Coleus extractas ForskolinColeus extract (Form: standardized to 10% Forskolin) PlantPart: root Genus: Coleus Species: forskohli125 mgColeus in Cardio-Stolix against 303 products125 mg per serving; the middle half of products list 73.5 mg to 250 mg, the median 125 mg.125 mg

42% of 303 products listing coleus give more (median 125 mg).

Olive leaf extractas OleuropeinOlive leaf extract (Form: standardized to 15% oleuropein) PlantPart: leaf75 mgOlive in Cardio-Stolix against 822 products75 mg per serving; the middle half of products list 30 mg to 300 mg, the median 100 mg.75 mg

57% of 822 products listing olive give more (median 100 mg).

Nattokinaseas SoyNattokinase (Form: from Soy) (Alt. Name: NSK-SD)500 FU

Source: NIH ODS Dietary Supplement Label Database, label 245225 (entered April 22, 2021), 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:

  • Its 1,333 mcg of folate is higher than 98% of the 7,022 folate products that print an amount; 145 list more.

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.

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: As a dietary supplement, adults take 4 capsules daily or as directed by your health professional.
Warnings
Warning: Not to be taken by pregnant or lactating women. If you have any health condition or are taking any medication, consult your health professional before use.
Keep out of the reach of children.
Use only if safety seal is intact.
Contains: Milk, Soy
Allergens and what it does not contain
Gluten-free, Non-GMO
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 245225.

What else is on the label?

Other ingredients: Hydroxypropyl Methylcellulose, Microcrystalline Cellulose, Vegetable Stearate.

How many labels does Cardio-Stolix have?

5 labels are on file under this name since February 23, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 245225 (current) Entered April 22, 2021 · on the market · 240 vegetarian capsules · UPC 3 10539 03537 5
  2. Label 31104 Entered March 25, 2014 · off the market January 31, 2024 · 240 vegetarian capsules · UPC 3 10539 03537 5
  3. Label 31047 Entered March 25, 2014 · on the market · 120 vegetarian capsules · UPC 3 10539 03920 5
  4. Label 10479 Entered July 25, 2012 · off the market January 31, 2024 · 240 vegetarian capsules · UPC 3 10539 02691 5
  5. Label 5446 Entered February 23, 2012 · off the market July 31, 2013 · 240 Vegetarian Capsules · UPC 3 10539 03537 5

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

Who makes it?

The label names Douglas Laboratories (manufacturer), Pittsburgh, PA. All Douglas Laboratories products.

Where next?