C Crystals

product on market Other (e.g. tea bag) Thompson 🟢 Safety: 100/100
Brand: Thompson
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • Limited research evidence available for ingredients
B Label Compliance Grade

Product Label

Label for C Crystals
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Label Data

0.25 tsp Serving Size
90 Servings
Vitamin Product Type
0% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
1250 mg (2083% DV)

Label Claims — Verification

❓ All Other
All Other (99% of products) Structure/Function (83% of products) Nutrient (54% of products)

Target Groups

Adult (18 - 50 Years)

Product Information

📋 Directions for Use

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 & Precautions

WARNING: Do not take if safety seal is broken or missing.

Keep out of reach of children.

Additional Information

SINCE 1932

100% PURE

FRESH HEALTHY

ONCE DAILY

Keep your licensed health care practitioner informed when using this product.

C-Crystals may also be used in home canning to prevent discoloration. Consult your recipe for proper measure.

Store in a cool, dry place.

Discussion: 100% Pure crystalline Vitamin C provides nutritive support for normal, healthy tissues, bones, teeth, and blood vessels.

Packaged by weight, not volume. Some settling of contents may occur.

1735713 1107

Product Details

UPC / SKU 0 31315 19010 0
DSLD Entry Date 2014-08-26
Product Type Vitamin
Form Other (e.g. tea bag)
Brand Thompson
DSLD ID 36637
Data Updated 2026-04-11

Research Evidence

371 Research Sources
54 Avg Quality Score
148 Meta Analysis
82 Systematic Review
71 Rct
62 Clinical Trial
2 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Other
1 Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
PubMed DOI Cochrane
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
PubMed DOI Cochrane
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
PubMed DOI Cochrane
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
PubMed DOI Cochrane
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
PubMed DOI Cochrane
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
PubMed DOI Cochrane
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
PubMed DOI
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024
PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
PubMed DOI
View all evidence for Vitamin C →

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