Formula 303

by DC · tablet or pill · 250 veg tablets

  • On the market (NIH)
  • DSLD label 267479
  • Serving 2 veg tablets
  • 125 servings

Formula 303 by DC lists 3 ingredients, 3 with an amount per serving of 2 veg tablets, such as 7 mg of magnesium, 260 mg of valerian extract and 260 mg of passion flower extract. Its current label entered the NIH Dietary Supplement Label Database on April 11, 2022.

What is in Formula 303?

Each row as the label prints it, per serving of 2 veg tablets. 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).

Formula 303: Supplement Facts rows against the market (DSLD label 267479, January 2026 release)
IngredientAmount% DVAmong products listing it
Magnesiumas Magnesium Gluconate7 mg2%Magnesium in Formula 303 against 14,003 products7 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg7 mg

95% of 14,003 products listing magnesium give more (median 86 mg). Per day at the most servings: 21 mg.

Valerian extractfrom 65 mg 4:1 extract260 mgValerian in Formula 303 against 647 products260 mg per serving; the middle half of products list 80 mg to 450 mg, the median 200 mg.260 mg

Higher than 61% of 647 products listing valerian (median 200 mg). Per day at the most servings: 780 mg.

Passion Flower extractfrom 65 mg 4:1 extract260 mgPassionflower in Formula 303 against 562 products260 mg per serving; the middle half of products list 40 mg to 200 mg, the median 100 mg.260 mg

Higher than 83% of 562 products listing passionflower (median 100 mg). Per day at the most servings: 780 mg.

Source: NIH ODS Dietary Supplement Label Database, label 267479 (entered April 11, 2022), 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:

  • 95% of the 14,003 products that print an amount of magnesium list more than its 7 mg of magnesium (median 86 mg).

The NIH database records 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
Directions: As a dietary supplement, take 2 tablets three times daily.
Warnings
Tamper Evident: Do not use this product if imprinted foil seal under cap is broken or missing.
Keep out of reach of children.
Caution: If you are pregnant or nursing do not take this product.
Allergens and what it does not contain
Gluten free
Storage
Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees to 30 degrees C).

Source: label statements in DSLD label 267479.

What else is on the label?

Other ingredients: Maltodextrin, Sodium Starch Glycolate, Vegetable Stearic Acid, Vegetable Cellulose, Silica, Vegetable Magnesium Stearate.

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

How many labels does Formula 303 have?

5 labels are on file under this name since February 23, 2022: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 267479 (current) Entered April 11, 2022 · on the market · 250 veg tablets
  2. Label 266659 Entered February 23, 2022 · on the market · 90 veg tablets
  3. Label 266658 Entered February 23, 2022 · on the market · 90 veg tablets
  4. Label 266657 Entered February 23, 2022 · on the market · 46 veg tablets
  5. Label 266656 Entered February 23, 2022 · on the market · 46 veg tablets

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

Who makes it?

The label names Dee Cee Laboratories, Inc. (manufacturer), White House, TN. All DC products.

Where next?