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Antioxidant support; Immune support; Collagen and skin support
People with busy lifestyles who want simple once-daily antioxidant and immune-related support, and those who prefer a gentler, non-acidic form of vitamin C.
Adults take 2 capsules once daily, preferably with a meal; taking with food can help reduce stomach discomfort.
Igen Non-GMO Tested; No gluten, yeast, wheat, milk, milk derivatives, lactose, soy, egg, grapefruit, sugar, starch, artificial color, artificial flavor, or sodium.
Ascorbate functions as an antioxidant and enzymatic cofactor, donating electrons to help neutralize free radicals and support normal collagen formation and immune cell activity.
Caution: May cause mild digestive discomfort in some people; taking with food can improve tolerance.
Bioflavonoids act as polyphenol antioxidants that may help stabilize vitamin C and support healthy capillary function and cellular antioxidant defenses.
Caution: May interact with certain medications or sensitivities to citrus-derived compounds; monitor tolerance.
Calcium supports normal cellular signaling and contributes to the buffered, non-acidic form of vitamin C in this product.
Caution: Consider total daily calcium intake from all sources to avoid excessive amounts.
Vitamin C provides core antioxidant and collagen-support roles, while citrus bioflavonoids help protect vitamin C and complement antioxidant activity. The calcium-ascorbate form buffers acidity, which may be gentler on the stomach compared to acidic forms.
Label Warning: If you are pregnant, nursing, taking any medications, or have a medical condition, consult a doctor before use. Stop use and consult a doctor if adverse reactions occur.
Who should be cautious: People with a known citrus or bioflavonoid sensitivity may be cautious. Those on medications that interact with calcium-sensitive drugs, such as certain thyroid medications or some antibiotics, may consider separating dosing and discussing with a healthcare provider before use.
Storage: Store at room temperature.
Many say it is easy on the stomach and does not cause discomfort.
Users report the capsules go down easily and the formula may support absorption over time.
Some feedback mentions relying on gradual, slow-release effects rather than immediate changes.
This product is guaranteed authentic and backed by our easy returns & refunds policy. Details
Vitamin D3 & K2 may complement Vitamin C by supporting bone health and immune function, promoting a balanced approach to wellness.
AI generated. Not medical advice.
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Ester-C® is a unique, breakthrough Vitamin C formula containing naturally occurring metabolites. Metabolites help enhance the retention of Vitamin C by your white blood cells, an important part of your immune system. Ester-C®'s water-based manufacturing process neutralizes pH, making it non-acidic and gentle on the stomach. In a daily 1,000 mg dose, Ester-C® delivers 24-hour immune support...so once a day is all you need.
For adults, take two (2) capsules once daily, preferably with a meal.
Gelatin, vegetable cellulose, vegetable stearic acid.
No gluten, no yeast, no wheat, no milk or milk derivatives, no lactose, no soy, no egg, no grapefruit, no sugar, no starch, no artificial color, no artificial flavor, no sodium.
This product does not contin common GE genes or proteins.
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. Store at room temperature. Do not use if seal under cap is broken or missing.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
| Supplement facts | ||
| Serving Size: 2 Capsules | ||
| Servings Per Container: 120 | ||
| Amount Per Serving: | %Daily Value | |
| Vitamin C (as Ester-C® Calcium Ascorbate) | 1,000 mg | 1,111% |
| Calcium (as Ester-C® Calcium Ascorbate) | 110 mg | 8% |
| Citrus Bioflavonoids Complex Citrus Bioflavonoids (Citrus limon) (fruit), Sweet Orange, Tangerine, Lime, Lemon, Acerola, Rutin, Hesperidin Complex (Citrus spp.) (fruit), Naturally Occurring Vitamin C Metabolites | 400 mg | ** |
| **Daily Value not established. | ||
