C-1000 Plus
by Progressive Professional from Progressive Laboratories · capsule · 90 capsules
- On the market (NIH)
- UPC 3 51821 00453 2
- DSLD label 323749
- Serving 3 capsules
- 30 servings
C-1000 Plus by Progressive Professional from Progressive Laboratories lists 7 ingredients, 3 with an amount per serving of 3 capsules, such as 1,000 mg of vitamin C, 1,000 mg of citrus bioflavonoids and 100 mg of rutin; 4 sit inside a blend without their own amounts. Its current label entered the NIH Dietary Supplement Label Database on January 23, 2025.
What is in C-1000 Plus?
Each row as the label prints it, per serving of 3 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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin Cas Ascorbic Acid | 1,000 mg | 1,666% | Higher than 91% of 18,583 products listing vitamin C (median 100 mg). |
| Citrus Bioflavonoids | 1,000 mg | Higher than 99% of 2,343 products listing flavonoid (median 50 mg). | |
| Rutin | 100 mg | Higher than 84% of 1,232 products listing rutin (median 25 mg). | |
| Proprietary Blend | 25 mg | ||
| Rose Hip, Powder | in the blend, no amount given | ||
| Acai berry extract | in the blend, no amount given | ||
| Yellow Pepper Fruit Extract | in the blend, no amount given | ||
| Spleen, Powder | in the blend, no amount given |
Source: NIH ODS Dietary Supplement Label Database, label 323749 (entered January 23, 2025), 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:
- Its 1,000 mg of vitamin C is higher than 91% of the 18,583 vitamin C products that print an amount; 445 list more.
- Its 1,000 mg of citrus bioflavonoids (filed by NIH under flavonoid) is higher than 99% of the 2,343 flavonoid products that print an amount; 4 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.
Which products have the closest formulas?
The products whose ingredient lists overlap most with C-1000 Plus's, rare ingredients counting for more.
- Vitamin-C Extended Release 1000 mgNova Nutritions 4 shared, 46% alike
- C-1000 1000 mgBest Naturals 4 shared, 46% alike
- Essential ImmunityPurity Products 4 shared, 44% alike
- Vitamin C & D Booster FormulaPurity Products 4 shared, 44% alike
- Chewable Vitamin C 500 mg Raspberry-CherryHarmonia 4 shared, 42% alike
- Vitamin C 500 Chewables Strawberry FlavorViva Vitamins 4 shared, 40% alike
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: Three capsules daily, or more, as directed by a health care professional.
- Warnings
- Sold only for dispensing by a licensed health care professional.
- Not to be used by pregnant or lactating women.
- Tamper evident band around cap and seal on bottle. Do not use if either seal is broken or missing.
- Keep out of reach of children.
Source: label statements in DSLD label 323749.
What else is on the label?
Other ingredients: Rice Flour, Gelatin, Vegetable Lubricants.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Certified GMP Complaint GMP Good Manufacturing Practices 21 CFR 111.
How many labels does C-1000 Plus have?
2 labels are on file under this name since May 19, 2022: other sizes, label designs and reformulations. The current one leads this page.
- Label 323749 (current) Entered January 23, 2025 · on the market · 90 capsules · UPC 3 51821 00453 2
- Label 261470 Entered May 19, 2022 · on the market · 250 capsules · UPC 3 51821 04532 0
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Progressive Laboratories, Inc. (manufacturer), Irving, Texas. All Progressive Professional from Progressive Laboratories products.