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Immune support; Upper respiratory wellness; Antioxidant support
Adults with busy lifestyles seeking daily immune-focused micronutrient support or those with limited fruit and vegetable intake.
Adults take 2 softgels daily, preferably with a meal; fat-containing meals may help absorption of vitamins A and D.
Non-GMO; No Artificial Flavor; No Artificial Sweetener; No Sugar; No Starch; No Milk; No Lactose; No Soy; No Gluten; No Wheat; No Yeast; No Fish; Sodium Free; Contains: sunflower-derived ingredients
Vitamin C functions as an antioxidant and cofactor for enzymes involved in collagen formation and immune cell activity, and Ester-C provides a buffered form that may be gentler on the stomach.
Caution: High-dose vitamin C may cause digestive discomfort in some people; take with food to reduce the chance of stomach upset.
Zinc supports normal function of immune cells by acting as a cofactor in antioxidant enzymes and facilitating cellular signaling.
Caution: Taking zinc on an empty stomach may cause nausea; avoid combining high-dose zinc with other minerals at the same time to reduce absorption competition.
Vitamin D3 influences immune cell gene expression and helps maintain normal immune surveillance.
Caution: Fat-soluble vitamins can accumulate; do not exceed suggested use unless directed, especially if you also use other vitamin D products.
Vitamin A supports the integrity of mucosal barriers and normal function of immune cells.
Caution: Excess preformed vitamin A can be harmful; avoid combining with high-dose vitamin A products and consult a professional if pregnant.
Elderberry provides polyphenols and anthocyanins that offer antioxidant activity and may support a balanced immune response.
Caution: May cause digestive discomfort in sensitive individuals; discontinue if you notice adverse reactions.
Vitamin C, zinc, and vitamin D3 act on key immune pathways, supporting antioxidant defenses and normal immune cell signaling. Vitamin A supports mucosal barrier integrity, while elderberry supplies polyphenols that add complementary antioxidant activity.
Label Warning: If you are pregnant, nursing, taking any medications, have a medical condition, or plan to undergo clinical lab testing, consult your doctor before use. Some supplements may interact with certain medications and may interfere with certain lab tests. Avoid if allergic to sunflowers or daisy-like flowers. Discontinue use if any adverse reactions occur. Not intended for those under 18.
Who should be cautious: People with allergies to sunflower or daisy family plants. Those who plan lab testing, since biotin and other ingredients may affect certain results. People on medications or with health conditions should discuss with a healthcare provider before use.
Storage: Store at room temperature.
Users mention the low-acidity formula feels easier on the stomach and is comfortable to take.
Despite the larger size, many reviewers say the softgels go down smoothly.
Some users note the softgels are big, which could be challenging for those who prefer smaller capsules.
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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Supports Upper Respiratory Health
Highly bioavailable Ester-C® can increase Vitamin C levels in the body, which is important for white blood cell function. White blood cells play a vital role in the immune system and contribute to the health of the upper respiratory tract.
These rapid release softgels also provide 9 essential nutrients to help keep you healthy.
The 24 Hour Difference
Every dose of Immune 24 Hour+ provides advanced, long-lasting immune support with 1,000 mg of Ester-C®. Clinically studied to stay in your white blood cells for up to 24 hours, Ester-C® is the only Vitamin C with 24 hour immune support.
Plus+
Provides Vitamin D, Vitamin A, and Zinc for extra immune plus antioxidant support. It also includes Elderberry and Echinacea.
For adults, take two (2) softgels daily, preferably with a meal.
Rice bran oil, gelatin, vegetable glycerin, natural caramel color. contains <2% of: carob powder (color), sunflower lecithin, yellow beeswax.
If you are pregnant, nursing, taking any medications, have any medical condition, or are planning to undergo any clinical lab testing, consult your doctor before use. Some supplements may interact with certain medications and/or interfere with certain lab tests. Avoid this product if you are allergic to sunflowers or daisy-like flowers. Discontinue use if any adverse reactions occur. Not intended for use by persons under the age of 18. 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 Softgels | ||
| Servings Per Container: 25 | ||
| Amount Per Serving | %Daily Value | |
| Calories | 20 | |
| Total Fat | 1 g | 1%** |
| Total Carbohydrate | 2 g | 1%** |
| Vitamin A (as Retinyl Palmitate) | 750 mcg | 83% |
| Vitamin C (as Ester-C® Calcium Ascorbate) | 1,000 mg | 1,111% |
| Vitamin D (as D3 Cholecalciferol) | 15 mcg (600 IU) | 75% |
| Vitamin B-6 (as Pyridoxine Hydrochloride) | 2 mg | 118% |
| Folate | 666 mcg DFE (400 mcg Folic Acid) | 167% |
| Vitamin B-12 (as Cyanocobalamin) | 6 mcg | 250% |
| Biotin | 300 mcg | 1,000% |
| Pantothenic Acid (as d-Calcium Pantothenate) | 10 mg | 200% |
| Magnesium (as Magnesium Oxide) | 25 mg | 6% |
| Zinc (as Zinc Oxide) | 15 mg | 136% |
| Elderberry (Sambucus nigra) (berry) | 17 mg | *** |
| Echinacea (Echinacea purpurea) (aerial) | 16.5 mg | *** |
| Astragalus (Astragalus membranaceus) (root) | 16.5 mg | *** |
| **Percent Daily Values are based on a 2,000 calorie diet. ***Daily Value not established. | ||
