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24-Hour Immune Support
Clinical studies show that Ester-C® increases vitamin C levels in the body for up to 24 hours.
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Quick Absorption
Better absorbed and more bioavailable due to the active vitamin C metabolites only found in Ester-C®.
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Gentle on the Stomach
Ester-C® is non-acidic and gentle, making it gentle on the digestive system unlike regular vitamin C.
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Backed by Science
The patented Ester-C® has been studied for decades and is better researched than all other buffered forms of vitamin C.
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Cold Season
Cold & Flu Rescue with Ester-C®
Fast-acting, potent combination to boost immune health and lessen the severity and duration of cold...
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Cold Season
Ester-C® 1000 mg
High-potency tablets enhanced with citrus bioflavonoids to help strengthen your immune system
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Ester-C® 250 mg Chewable
A flavourful Ester-C® option for children and adults who don't like swallowing pills
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Ester-C® 500 mg Chewable
A flavourful Ester-C® option for children and adults who don't like swallowing pills
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Ester-C® 600
The advanced immune-supporting properties of Ester-C® enhanced with 100 mg of citrus bioflavonoids for superior...
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Ester-C® Energy Boost
A daily vitamin drink mix with 1000 mg of Ester-C®, B vitamins and electrolytes in...
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Most Popular
Ester-C® Supreme
Ester-C® with powerful bioflavonoids and immune-boosting arabinogalactan to help strengthen your immune system and alleviate...
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Kids Ester C® 250 mg chewable
120 | Chewable Tablets Ester-C® Chewables are a favourful option for children who don’t like...
How it Works
Ester-C® is a unique and patented form of calcium ascorbate, which is created when ascorbic acid (vitamin C) is buffered with calcium.
Ester-C® takes calcium ascorbate and, using a proprietary, water-based manufacturing process, produces a pH neutral product that contains active vitamin C metabolites (that do not exist in any other form of vitamin C, including calcium ascorbate).
These natural metabolites provide quick absorption.
Ester-C® also functions biologically like other forms of vitamin C, providing benefits for skin, joint and vision health, cardiovascular support, antioxidant protection and immune system wellness.