C Crystals
by Thompson · other (e.g. tea bag) · 4 oz.
- On the market (NIH)
- UPC 0 31315 19010 0
- DSLD label 36637
- Serving 0.25 tsp (approx. 1.25g)
- 90 servings
C Crystals by Thompson lists one ingredient: 1,250 mg of vitamin C per serving of 0.25 tsp. Its current label entered the NIH Dietary Supplement Label Database on August 26, 2014.
What is in C Crystals?
Each row as the label prints it, per serving of 0.25 tsp. 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 | 1,250 mg | 2,083% | Higher than 98% of 18,583 products listing vitamin C (median 100 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 36637 (entered August 26, 2014), 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 1,250 mg of vitamin C is higher than 98% of the 18,583 vitamin C products that print an amount; 277 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?
6 products list the very same ingredients; the nearest amounts come first.
- Vitamin C Crystals 5,000 mgWonder Laboratories same ingredients
- Vitamin C CrystalsWonder Laboratories same ingredients
- C-CrystalsDC same ingredients
- High Potency Vitamin C Powder365 Everyday Value same ingredients
- Vitamin C Capsules 600 mgNutrition Rescue same ingredients
- Vitamin C 600 mgChief Originals · off the market same ingredients
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: Use only as directed. Mix 1/4 teaspoon into water or fruit juice as a beverage to be taken at mealtime.
- Try it with water or your favorite juice.
- Warnings
- WARNING: Do not take if safety seal is broken or missing.
- Keep out of reach of children.
- Storage
- Store in a cool, dry place.
Source: label statements in DSLD label 36637.
How many labels does C Crystals have?
One label is on file, entered on August 26, 2014.
- Label 36637 (current) Entered August 26, 2014 · on the market · 4 oz. · UPC 0 31315 19010 0
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names NutraPure, Inc. (manufacturer). All Thompson products.