🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 50% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Label Data

2 Capsule(s) Serving Size
45 Servings
Single Vitamin and Mineral Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
1000 mg (1667% DV)
7.5 mg (50% DV)
✅ Within RDA (0.7× RDA of 11 mg) 📚 258 studies (Tier A: 6, B: 134)
RDA 11mg This product: 7.5mg UL 40mg

Other Ingredients

Vegetable Capsule Cellulose Vegetable Stearate Silica

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (100% of products) Structure/Function (88% of products) Nutrient (59% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Suggested Use: Take 1-2 servings per day, or as directed by a healthcare practitioner.

⚠️ Warnings & Precautions

Warning: Consult a healthcare practitioner before taking this or any nutritional supplement if you are pregnant/nursing, have or suspect a medical condition, are taking any medications, or other non-Natural Stacks dietary supplements.

Do not use if safety seal is broken or missing.

Keep out of reach of children.

🧪 Formulation Notes

Natural Stacks Vitamin C with Zinc features Quail-C ascorbic acid derived from non-GMO corn grown in the green hills of Scotland.

Quali-C

No GMO No Gluten No Artificial Colors No Preservatives

Additional Information

Research suggests that the compounds in this supplement are potent antioxidants that can support many areas of health, including the immune system.

Store in a cool dry place.

U.S.A. manufactured in a cGMP facility.

Immunity support

DV = Daily Value

Product Details

UPC / SKU 7 01698 82647 6
DSLD Entry Date 2016-11-21
Product Type Single Vitamin and Mineral
Form Capsule
DSLD ID 66767
Data Updated 2026-04-11

Research Evidence

1 Research Sources
62 Avg Quality Score
1 Clinical Trial
B Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial
Clinical Trial Nature and science of sleep 2025
View all evidence for Magnesium Glycinate →

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