Ester-C 24 Hour Immune Support
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 activity. Calcium is well-documented for supporting bone health and cellular signaling. Together, these ingredients provide foundational nutritional support, though evidence for the specific synergistic effect of this blend is limited.
AI-generated summary based on research evidence. Not medical advice.
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Product Information
Directions for Use
Directions: For adults, take one (2) tablets once daily, preferably with a meal.
2 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
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.
Patented immune health formula
Plus, Ester-C is manufactured without chemicals to neutralize pH, which means it’s non-acidic and gentle on your stomach.
Patented Ester-C delivers 24-hour immune and antioxidant support...so one serving a day is all you need.
Clinically studied to last longer than regular Vitamin C
Ester-C lasts longer than regular Vitamin C and supports your immune system for 24 hours!
Enjoy the benefits of Ester-C every day! Patented 24 hour immune support Clinically studied to stay in the immune system longer than regular vitamin C Non-acidic and gentler on your stomach than regular Vitamin C
Additional Information
Store at room temperature.
Made in the USA with select ingredients from around the world
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.
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
Stomach friendly!
Not all Vitamin C is created equal...There is only one patented Ester-C formula
Call toll free 1-866-417-0739 with questions or comments, Mon.-Sat., 9am-7pm EST.
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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.