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Immune support; Antioxidant support; Collagen formation; General wellness
Adults with low fruit and vegetable intake or those seeking a gentle, non-acidic vitamin C option for daily wellness.
Adults take 2 capsules once daily, preferably with a meal; taking with food may improve tolerance for sensitive stomachs.
Non-GMO tested; No gluten, yeast, wheat, milk, lactose, soy, egg, grapefruit, sugar, starch, artificial color, artificial flavor, or sodium.
Vitamin C functions as an electron donor antioxidant and enzyme cofactor, supporting collagen formation and normal immune cell activity; the Ester-C form is non-acidic and includes metabolites that may enhance cellular uptake and retention.
Caution: May cause digestive discomfort in some people; take with food if sensitive.
Citrus bioflavonoids act as polyphenol antioxidants that may help stabilize vitamin C and support healthy capillary integrity and oxidative balance.
Caution: May interact with certain medications or cause mild stomach upset in sensitive individuals; monitor tolerance.
Calcium supports normal muscle contraction, nerve signaling, and cellular processes; in this formula it also serves as the mineral carrier for vitamin C as calcium ascorbate.
Caution: Total daily calcium from all sources matters; high intakes may contribute to constipation in some people.
Vitamin C provides core antioxidant and immune-related support, while citrus bioflavonoids help protect vitamin C and contribute additional antioxidant activity. The calcium ascorbate form makes the vitamin C non-acidic, which may be gentler on the stomach.
Label Warning: If you are pregnant, nursing, taking any medications, or have any medical condition, consult your doctor before use. Stop use and consult your doctor if any adverse reactions occur.
Who should be cautious: People taking thyroid medications or certain antibiotics may need to separate calcium-containing supplements by at least 2 hours due to possible absorption interference. Those with a history of kidney stones or high calcium levels may wish to discuss vitamin C and calcium intake with a healthcare provider.
Storage: Store at room temperature.
Reviewers say the buffered formula feels non-acidic and does not cause stomach discomfort.
Customers find the capsules simple to take and convenient for daily use or travel.
Some mentions of reduced allergy symptoms appear, but experiences are not consistent across users.
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® has a neutral 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 contain 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: 30 | ||
| 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. | ||
