Ester-C 24 Hour Immune Support 1000 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 moderate evidence for promoting immune function and antioxidant activity. Calcium is essential for various physiological processes, including bone health and cellular signaling. These ingredients are generally recognized as safe when taken within recommended daily limits.
AI-generated summary based on research evidence. Not medical advice.
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Label Data
Supplement Facts — Evidence Check
Other Ingredients
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Product Information
Directions for Use
Directions: For adults, take one (1) tablet daily, preferably with a meal.
1 Per day
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
Plus, Ester-C is manufactured without chemicals to neutralize pH, which means it’s non-acidic and gentle on your stomach.
Non-GMO
Non-gmo. No gluten, no wheat, no milk, no lactose, no artificial color, flavor or sweetener, no preservatives, no sugar, no starch, no soy, no yeast, no fish. Sodium free.
Suitable for Vegetarians.
Additional Information
Patented immune health formula
Maximum strength Stomach friendly!
Ester-C is the patented immune health formula that stays in your system for 24 hours – so you have the kind of support you can count on 24/7. Ester-C is carefully formulated to contain naturally occurring metabolites. Metabolites are substance derived from other compounds (such as nutrients) during the process of metabolism. The metabolites in Ester-C help enhance the retention of Vitamin C by your white blood cells, which are a vital component of your immune system. So once you take your daily dose of Ester-C, it gets into your white blood cells, and stays there – for up to 24 hours, clinically studied to last longer than regular Vitamin C.
PROD No. 56027 01B B16980 FAE
Store at room temperature.
Ester-C has been clinically studied to stay in the white blood cells for up to 24 hours, which is longer than regular Vitamin C. White blood cells are an important component of the immune system
Call toll free 1-866-417-0739 with questions or comments, Mon.-Sat., 9am-7pm EST. www.Ester-C.com
Made in the USA with select ingredients from around the world
Clinically studied to last longer than regular Vitamin C
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.