🟢 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

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Label Data

4 Capsule(s) Serving Size
30 Servings
Other Combinations Product Type
0% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
600 mg (667% DV)
500 mg (10000% DV)
📊 100.0× RDA — above typical dose 📚 1 studies — no high-quality reviews
RDA 5mg This product: 500mg
📊 Market median: 500.0mg (115 products)
Median 500.0mg This product: 900mg
Bee Propolis powder
900 mg
Masson Pine bark extract
90 mg
Pycnogenol
10 mg

Other Ingredients

Hypromellose Magnesium Stearate Rice Flour

Label Claims — Verification

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

Target Groups

Adult (18 - 50 Years) Kosher Dairy Free

Product Information

📋 Directions for Use

Directions: Take 4 capsules daily, preferably 2 capsules twice a day with food, or as directed by a healthcare practitioner.

⚠️ Warnings & Precautions

Keep out of reach of children.

Do not use if safety seal is damaged or missing.

If pregnant, nursing or on medication, consult with your healthcare practitioner.

🧪 Formulation Notes

Synergistic immune system support

A synergistic formula of Vitamin C, Pantothenic Acid, Olive Leaf Extract and more, Zahler Immune Defense provides powerful nutritional support for a healthy immune system and general wellness.

Kosher Pareve Under the strict supervision of Rabbi SH. Stern & the orthodox union

Dairy free Soy free

Immune system support formula Synergistic immune system support

Additional Information

You may need additional supplements to support a healthy diet; consult your nutritionist for a formula that is right for you or contact us at 877-ASK-ZAHLER (877-275-9245) or ask@zahlers.com.

D (Dairy Kosher) OU (Kosher) This product was manufactured in a GMP certified Facility

Store tightly closed in a cool, dry place.

Made in the USA

Feel better, everyday.

Product Details

UPC / SKU 8 48998 08112 6
DSLD Entry Date 2022-02-23
Product Type Other Combinations
Form Capsule
DSLD ID 260072
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
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024
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
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021
View all evidence for Vitamin C →

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