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Nature's Bounty

Ester-C®, Maximum Strength, 1,000 mg, 120 Vegetarian Coated Tablets

4.9 · 12046 reviews
1,788 ₽

Supports Upper Respiratory Health The Better Vitamin C® 24 Hour Immune Support Non GMO Clinically Studied Vitamin C Stomach Friendly Dietary Supplement Suitable for Vegetarians Sodium Free Ester-C® Vitamin C lasts longer than regular Vitamin C in White Blood Cells over 24 hours!† Enjoy the benefits of Ester-C® Vitamin C every day! 24 Hour Immune Support Clinically studied to last longer than regular Vitamin C† Non-acidic and gentle on the stomach Supports upper respiratory health Potent antioxidant support Not all Vitamin C is created equal...There is only One Unique Ester-C® formula 24 Hour Immune Support Immune & upper respiratory health support. Ester-C® is the unique immune health formula containing a proprietary, clinically studied Vitamin C that stays in your immune system for 24 hours.† Ester-C ® Vitamin C is clinically shown to last longer than regular vitamin C. That's because Ester-C ® Vitamin C is carefully formulated to contain vitamin C metabolites, the same metabolites that are naturally produced by your body and help enhance the retention of vitamin C by your white blood cells, a vital part of your immune system. So once you take your daily dose of Ester-C ® Vitamin C, it gets into your white blood cells, and stays there - for up to 24 hours. Vitamin C also contributes to the health of your upper respiratory tract, plus, Ester-C® Vitamin C is manufactured without chemicals to neutralize pH, which means it's non-acidic and gentle on your stomach. Ester-C® is the kind of support you can count on 24/7! †Ester-C ® Vitamin C has been clinically studied to stay in your white blood cells for up to 24 hours, which is longer than regular Vitamin C. White blood cells are an important component of the immune system.

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Supports Upper Respiratory Health The Better Vitamin C® 24 Hour Immune Support Non GMO Clinically Studied Vitamin C Stomach Friendly Dietary Supplement Suitable for Vegetarians Sodium Free Ester-C® Vitamin C lasts longer than regular Vitamin C in White Blood Cells over 24 hours!† Enjoy the benefits of Ester-C® Vitamin C every day! 24 Hour Immune Support Clinically studied to last longer than regular Vitamin C† Non-acidic and gentle on the stomach Supports upper respiratory health Potent antioxidant support Not all Vitamin C is created equal...There is only One Unique Ester-C® formula 24 Hour Immune Support Immune & upper respiratory health support. Ester-C® is the unique immune health formula containing a proprietary, clinically studied Vitamin C that stays in your immune system for 24 hours.† Ester-C ® Vitamin C is clinically shown to last longer than regular vitamin C. That's because Ester-C ® Vitamin C is carefully formulated to contain vitamin C metabolites, the same metabolites that are naturally produced by your body and help enhance the retention of vitamin C by your white blood cells, a vital part of your immune system. So once you take your daily dose of Ester-C ® Vitamin C, it gets into your white blood cells, and stays there - for up to 24 hours. Vitamin C also contributes to the health of your upper respiratory tract, plus, Ester-C® Vitamin C is manufactured without chemicals to neutralize pH, which means it's non-acidic and gentle on your stomach. Ester-C® is the kind of support you can count on 24/7! †Ester-C ® Vitamin C has been clinically studied to stay in your white blood cells for up to 24 hours, which is longer than regular Vitamin C. White blood cells are an important component of the immune system.

Customer reviews

5.0
verified purchase
Great Vit C

The quality of the ingredient is superb! The size of the tablet is huge but I dont mind since one tab is already 1,000 mg. It has helped my immunity a lot. I dont get sick more often since it is a great antioxidant. The potency is good yet its acidity is neutral in fact, sometimes I take it on an empty stomach and I have no problems whatever. The effect is very good on my skin too, I can see an afterglow when Im taking this. I take it with Zinc Picolinate. The package is huge. I also like that there is no sour taste.

9/22/2025
5.0
verified purchase
my family's go to choice for vit c

I’ve been using Ester-C for yrs now 1000mg, and it’s hands down my favorite vitamin C supplement. The best part is that it’s non-acidic, so it doesn’t upset my stomach like regular ascorbic acid sometimes does. I can take it even on an empty stomach without any discomfort. In terms of immune support, I’ve noticed I don’t catch colds as often, and if I do, they’re milder and pass faster. It also feels like it gives me a subtle energy boost, especially during stressful weeks. Overall, it’s effective, gentle, and reliable — a solid addition to my daily routine.

5/9/2025
5.0
verified purchase
Stomach-friendly immunity boost!

Love Ester-C because it gives great 24-hour immune support without causing any stomach acidity or irritation. The tablets are slightly large, but they are coated, so they go down smoothly.

8/12/2026
5.0
verified purchase

I’m very pleased with my experience using this product. The quality is excellent and I felt noticeable improvements after taking it consistently. It has helped me feel more balanced and comfortable overall, especially during busy and stressful days. The capsules are easy to take and gentle on the stomach, which I really appreciate. I also like that it’s well-packaged and arrived in perfect condition. The size is practical and offers great value for the price. I’ve tried many different wellness products before and this one truly stands out in terms of effectiveness and consistency. I will definitely continue using this in my daily routine, and I highly recommend giving it a try if you’re looking for something reliable and beneficial for overall wellness.

3/18/2026
5.0
verified purchase
good

good quality big size help to improve my immune system and give high energy reduce tiredness i take in morning

1/9/2026
5.0
verified purchase

A staple in our supplement repertoire. Ester c never falters in its quality and clean ingredients. Its non acidic which is one of its important features.

1/7/2026
5.0
verified purchase

Great quality supplement! Perfect for your immune system during a flu season. Doesn’t mess with my stomach acidity. As everyone might already know, Vitamin C has incredible benefits for the overall health as well as our skin because it’s a very potent antioxidant! I can feel the effect almost immediately! Highly recommend it to everyone who frequently feels tired and under the weather.

12/28/2025
5.0
verified purchase
love it

i love this vitamin c, quality is great, ingredient are clean, size of pills is big but i don't mind, but if u struggle with drinking pills, then i wouldn't advice you to buy this, it doesn't bother my stomach, taste good

11/22/2025
5.0
verified purchase

Thank you for providing such outstanding supplements! The quality is exceptional, with thoughtfully selected ingredients that offer remarkable health benefits. Your products have made a significant positive impact on my overall well-being. I also appreciate the secure and reliable packaging. Thanks again, iHerb!

10/15/2025
5.0
verified purchase
⭐️⭐️⭐️⭐️⭐️ Excellent Vitamin C for Immune Support!

⭐️⭐️⭐️⭐️⭐️ Excellent Vitamin C for Immune Support! Nature’s Bounty Ester-C® Maximum Strength (1,000 mg) is a gentle and effective vitamin C supplement that provides long-lasting immune support without upsetting the stomach. The tablets are easy to take and coated for smooth swallowing. ✅ Key Details: Size: 120 vegetarian coated tablets Each Tablet Contains: 1,000 mg Ester-C® (calcium ascorbate) Form: Non-acidic, stomach-friendly vitamin C Free of: GMOs, gluten, soy, dairy, artificial colors, and preservatives Suitable for: Vegetarians 💪 Benefits: Provides 24-hour immune system support Promotes collagen formation for healthy skin, joints, and gums Gentle on the stomach, unlike regular vitamin C Supports antioxidant protection against free radicals ⭐️ Overall: A high-quality, easy-to-digest vitamin C supplement that offers reliable immune and antioxidant support — perfect for daily use all year round!

10/10/2025