Ester-C 24 Hour Immune Support 500 mg
This product looks safe
- No ingredients exceed tolerable upper intake levels
- 33% of ingredients have research evidence
What the Evidence Says
AI-generated · Qwen 3.6 · methodologyVitamin C and citrus bioflavonoids are supported by strong evidence for maintaining immune function and antioxidant defense. Calcium provides essential structural support for bones and cellular signaling. These ingredients are generally recognized as safe for consumption at the provided dosage.
AI-generated summary based on research evidence. Not medical advice.
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Product Information
Directions for Use
Directions: For adults, take two (2) tablets once daily, preferably with a meal.
Warnings & Precautions
Warning: If you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use.
Discontinue use and consult your doctor if any adverse reactions occur.
Keep out of reach of children.
Do not use if seal under cap is broken or missing.
Formulation Notes
Ester-C Vitamin C is clinically shown to last longer than regular vitamin C. That's because Ester-C Vitamin C is carefully formulated to contain vitamin C metabolites, the same metabolites that are naturally produced by your body and help enhance the retention of Vitamin C by your white blood cells, a vital part of your immune system. So once you take your daily dose of Ester-C Vitamin C, it gets into your white blood cells, and stays there - for up to 24 hours. Vitamin C also contributes to the health of your upper respiratory tract, plus, Ester-C Vitamin C is manufactured without chemicals to neutralize pH, which means it's non-acidic and gentle on your stomach.
Vitamin C also contributes to the health of your upper respiratory tract, plus, Ester-C Vitamin C is manufactured without chemicals to neutralize pH, which means it's non-acidic and gentle on your stomach.
Non-gmo. No gluten, no wheat, no milk, no lactose, no artificial color, flavor or sweetener, no sugar, no starch, no soy, no yeast, no fish. Sodium free.
Suitable for Vegetarians.
Supports upper respiratory health
Non GMO
Clinically studied Vitamin C
Stomach friendly
Additional Information
Ester-C is the kind of support you can count on 24/7!
Store at room temperature.
Call toll free 1-866-417-0739 with questions or comments, Mon.-Sat., 9am-7pm EST.
Made in the USA with select ingredients from around the world
Product Details
Research Evidence
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.