C-Crystals

by DC · powder · 1 lb

On the market (NIH)
DSLD label 267539
Serving 0.25 tsp
363 servings

C-Crystals by DC 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 April 11, 2022.

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).

C-Crystals: Supplement Facts rows against the market (DSLD label 267539, January 2026 release)
Ingredient	Amount	% DV	Among products listing it
Vitamin Cas L-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 267539 (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:

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.

C CrystalsThompson same ingredients
Vitamin C Crystals 5,000 mgWonder Laboratories same ingredients
Vitamin C CrystalsWonder Laboratories 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: As a dietary supplement 1/4 teaspoonful or more daily, preferably at mealtime. May be added to juice or sprinkled on food.
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 267539.

What else is on the label?

Other ingredients: None.

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

How many labels does C-Crystals have?

4 labels are on file under this name since February 25, 2021: other sizes, label designs and reformulations. The current one leads this page.

Label 267539 (current) Entered April 11, 2022 · on the market · 1 lb
Label 267538 Entered April 11, 2022 · on the market · 8 ounces
Label 267240 Entered April 11, 2022 · on the market · 8 ounces
Label 244428 Entered February 25, 2021 · on the market · N/A

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. (distributor), White House, TN. All DC products.