Ester-C 24 Hour Immune Support 1000 mg
NatureSmart
Ester-C 24 Hour Immune Support 1000 mg
4.9
★ ★ ★ ★ ★
(12141 ratings)
Vitamin C 1000 mg
Score 88.0
A well-regarded Ester-C Vitamin C supplement providing 1000mg per serving in a stomach-friendly form. Offers excellent value within the buffered Vitamin C category, supporting immunity, skin, and overall health.
Quantity: 120 Tablet(s)Servings size: 1 Tablet(s) (120 servings)
Selected goals:
Other goals:
General Health
Heart Health
Anti-Aging
Cardiovascular Support
Immunity
leaderboard Score 88.0
A well-regarded Ester-C Vitamin C supplement providing 1000mg per serving in a stomach-friendly form. Offers excellent value within the buffered Vitamin C category, supporting immunity, skin, and overall health.
insights Analysis
NatureSmart Ester-C 24 Hour Immune Support 1000 mg is a highly rated Vitamin C supplement utilizing calcium ascorbate, a non-acidic form known for being easier on the digestive system compared to traditional ascorbic acid. This makes it particularly suitable for individuals who experience stomach upset or acidity issues with standard Vitamin C supplements. The 1000mg dosage is effective for robust immune support, promoting collagen synthesis for skin health, and acting as a powerful antioxidant for general health and anti-aging. While the '24 Hour' claim is a marketing point suggesting prolonged retention, scientific evidence indicates that all forms of Vitamin C are water-soluble and regularly excreted, meaning consistent intake is generally more important than a specific '24-hour' formulation. However, Ester-C does show slightly higher retention in white blood cells compared to ascorbic acid in some studies, which may offer a marginal advantage for some. Online reviews widely praise its effectiveness and gentleness, confirming its consumer appeal.
- Uses Ester-C (calcium ascorbate), which is gentle on sensitive stomachs, reducing digestive upset.
- Provides a potent 1000mg dose per serving, suitable for strong immune support and therapeutic uses.
- Offers a very competitive price per serving ($0.08) for a buffered Vitamin C form, enhancing affordability.
- High review count and positive online reputation indicate widespread customer satisfaction.
- The '24-hour immune support' claim is more marketing than scientifically proven for continuous efficacy throughout a full day.
- May still be slightly more expensive than basic ascorbic acid for those without stomach sensitivity, who may not benefit from the buffered form's premium.
$21.70($0.18 per serving)
 iHerb | $ 21.70 | |
 Walmart | $ 23.60 |
bolt Effectiveness for goals
Vitamin C contributes to immune defense by supporting various cellular functions of both the innate and adaptive immune system. It aids in the production and function of white blood cells and supports epithelial barrier function against pathogens. While essential, large doses have not been shown to significantly "boost" immunity beyond preventing deficiency.
Regular Vitamin C supplementation may slightly reduce the duration and severity of the common cold in some individuals, particularly those under extreme physical stress. However, it does not reliably prevent colds in the general population. Research indicates limited benefit for prevention in most people.
Adequate Vitamin C intake is crucial for collagen formation, which supports healthy skin, bones, and cartilage. It also plays a vital role in immune function, iron absorption, and acts as a powerful antioxidant protecting cells from damage. It is essential for general growth, development, and tissue repair.
Vitamin C is a powerful antioxidant that helps protect the skin from oxidative damage caused by UV exposure and pollutants. It is also essential for collagen synthesis, which contributes to skin structure and elasticity. Both dietary and topical Vitamin C are recognized for supporting skin health.
Yes, Vitamin C is a potent antioxidant that helps protect cells from damage caused by free radicals. These unstable molecules are generated by normal bodily processes and environmental stressors. This antioxidant function is crucial for overall cellular health and can reduce oxidative stress.
schedule Dosage, timing & forms
Ascorbic acid is the most common and widely studied form of Vitamin C. Ester-C, often calcium ascorbate, is a buffered form that may be gentler on the stomach. Liposomal Vitamin C encapsulates the nutrient in tiny fat-like spheres, which may enhance absorption and bioavailability in some cases.
The Recommended Dietary Allowance (RDA) for adult men is 90 mg per day and for adult women is 75 mg per day. Higher amounts may be recommended for smokers. These dosages are generally sufficient to prevent deficiency.
Yes, different forms can influence absorption rates. While ascorbic acid is generally well-absorbed, some forms like liposomal Vitamin C are designed to offer enhanced absorption, potentially improving bioavailability. Buffered forms like calcium ascorbate are often chosen for better tolerance, especially for sensitive individuals.
For most adult men, the recommended daily allowance (RDA) of Vitamin C is 90 mg, and for adult women, it is 75 mg. These amounts are generally sufficient to prevent deficiency and support overall health. Higher doses may be considered in specific circumstances.
The tolerable upper intake level (UL) for Vitamin C in adults is 2,000 mg (2 grams) per day. Exceeding this limit can lead to gastrointestinal side effects such as diarrhea, nausea, and abdominal cramps. This UL is set to prevent adverse effects.
health_and_safety Safety & interactions
High doses of Vitamin C may lead to digestive upset, such as diarrhea, nausea, and abdominal cramps. These effects are generally mild and more likely to occur with doses exceeding the tolerable upper intake level. Reducing the dose usually alleviates these symptoms.
The tolerable upper intake level (UL) for Vitamin C in adults is 2,000 mg per day. Consuming amounts above this UL may increase the risk of gastrointestinal disturbances like diarrhea. Exceeding this limit regularly is generally not recommended without medical supervision.
Vitamin C enhances the absorption of non-heme iron, which is found in plant-based foods and supplements. This interaction can be beneficial for individuals with low iron stores or those following vegetarian or vegan diets. Taking Vitamin C with iron supplements may improve their effectiveness.
For most healthy individuals, Vitamin C supplementation does not significantly increase the risk of kidney stones. However, individuals with a history of kidney stones or certain underlying conditions, particularly those prone to oxalate-type stones, might need to exercise caution with high doses. Vitamin C can be metabolized into oxalate, which is a component of some kidney stones.
Some older studies suggested high doses of Vitamin C might interfere with the effectiveness of certain anticoagulants like warfarin. However, more recent evidence indicates that moderate Vitamin C intake is unlikely to have a significant effect on most common blood thinners. Patients on anticoagulant therapy should discuss any supplement use with their healthcare provider.
Ingredients
| Ingredient | Amount per serving |
|---|---|
Vitamin C | 1000 mg |
Calcium | 110 mg |
C-Sorb Citrus Bioflavonoid Complex | 102 mg |
Categories
Vitamin C 90.0
As a Vitamin C supplement, it provides a high, bioavailable dose in a stomach-friendly form, making it a strong contender in its category for broad appeal and effectiveness.
Goals
Immunity 95.0
The 1000mg dose is highly effective for supporting immune function, a primary and well-established role of Vitamin C, particularly valuable during periods of increased need.
General Health 90.0
As an essential vitamin, this 1000mg dose contributes significantly to daily nutritional requirements, supporting various metabolic processes and overall physiological well-being.
Skin Health 90.0
Vitamin C is critical for collagen synthesis, making this dose highly beneficial for maintaining skin elasticity, supporting wound healing, and contributing to a healthy complexion.
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