Last update
4/6/2026
Reviewed By
Overview
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 9 Reviews
8.3
Supplement Facts
Serving Size: 2 Capsules
Amount Per Serving
%DV
Vitamin C(as Ester-C® Calcium Ascorbate)
1,000 mg (1 g)
1,111%
Calcium(as Ester-C® Calcium Ascorbate)
110 mg
8%
Citrus Bioflavonoids ComplexCitrus Bioflavonoids (Citrus limon) (fruit), Sweet Orange,Tangerine, Lime, Lemon, Acerola, Rutin, Hesperidin Complex(Citrus spp.) (fruit), Naturally Occurring Vitamin C Metabolites
400 mg
**
Most Useful Reviews
9
Non-aggressive formula
This luxurious vitamin C, combined with bioflavonoids, is ideal for long-term use. I find it the best option in terms of price and quality on Iherb. It is gentle on the stomach unlike some other vitamin C supplements. I recover from colds more quickly when combined with vitamin D and zinc.
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9
Gentle on stomach
I want to emphasise that for those with a sensitive stomach and high acidity, this vitamin C formulation is a blessing! I take it continually, even on an empty stomach, without any discomfort or irritation. It has become my favourite!
Read More
9
Effective against viruses
8 people found this helpful
This outstanding form of Vitamin C is essential during the current period. Everyone needs it in their first-aid kit. It features a complex of citrus bioflavonoids, which enhance vitamin C absorption. While the capsules are larger, they are still easy to swallow, and I take them after meals. During colds or acute respiratory infections, I increase my intake to 1-2 g per day, divided into doses. I would also like to add vitamin D3 and zinc for further support. From personal experience, this regimen quickly aids recovery from viral loads, typically within a couple of days.
Read More
User Reviews
USERS' SCORE
Good
Based on 9 Reviews
8.3
- All Reviews
- Positive Reviews
- Negative Reviews
9
Non-aggressive formula
This luxurious vitamin C, combined with bioflavonoids, is ideal for long-term use. I find it the best option in terms of price and quality on Iherb. It is gentle on the stomach unlike some other vitamin C supplements. I recover from colds more quickly when combined with vitamin D and zinc.
Read More
9
Gentle on stomach
I want to emphasise that for those with a sensitive stomach and high acidity, this vitamin C formulation is a blessing! I take it continually, even on an empty stomach, without any discomfort or irritation. It has become my favourite!
Read More
9
Effective against viruses
8 people found this helpful
This outstanding form of Vitamin C is essential during the current period. Everyone needs it in their first-aid kit. It features a complex of citrus bioflavonoids, which enhance vitamin C absorption. While the capsules are larger, they are still easy to swallow, and I take them after meals. During colds or acute respiratory infections, I increase my intake to 1-2 g per day, divided into doses. I would also like to add vitamin D3 and zinc for further support. From personal experience, this regimen quickly aids recovery from viral loads, typically within a couple of days.
Read More
9
Avoided illness
This vitamin C is simply perfect! The composition is outstanding, ensuring 100% absorption. When I feel unwell, I take a double dose, go to bed, and wake up feeling healthy. I used to get sick frequently, but since my doctor recommended this, I have not fallen ill for two years, even avoiding covid. At times when weakness struck, Ester-C saved me. Be mindful of the composition when selecting vitamin C, especially since similar options were scarce during the pandemic.
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7.5
Preventive health
I have been using this vitamin C for over four years on the advice of my endocrinologist, taking 500 mg daily. When I start feeling unwell, I simply add another 500 mg. Compared to tablets from the same brand, these capsules are much easier to swallow.
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Frequently Asked Questions
9
Effective against viruses
8 people found this helpful
This outstanding form of Vitamin C is essential during the current period. Everyone needs it in their first-aid kit. It features a complex of citrus bioflavonoids, which enhance vitamin C absorption. While the capsules are larger, they are still easy to swallow, and I take them after meals. During colds or acute respiratory infections, I increase my intake to 1-2 g per day, divided into doses. I would also like to add vitamin D3 and zinc for further support. From personal experience, this regimen quickly aids recovery from viral loads, typically within a couple of days.
9
Gentle on stomach
I want to emphasise that for those with a sensitive stomach and high acidity, this vitamin C formulation is a blessing! I take it continually, even on an empty stomach, without any discomfort or irritation. It has become my favourite!
9
Avoided illness
This vitamin C is simply perfect! The composition is outstanding, ensuring 100% absorption. When I feel unwell, I take a double dose, go to bed, and wake up feeling healthy. I used to get sick frequently, but since my doctor recommended this, I have not fallen ill for two years, even avoiding covid. At times when weakness struck, Ester-C saved me. Be mindful of the composition when selecting vitamin C, especially since similar options were scarce during the pandemic.
7.5
Improved immunity
4 people found this helpful
Vitamin C in the form of Ester-C with citrus bioflavonoids, plus Lysine, has been effective in my battle against herpes. The Ester-C form remains in the body longer, providing better results, while the added citrus bioflavonoids enhance vitamin C absorption. I took it alongside Lysine for genital herpes, at a dose of 1000mg daily, noticing fewer rashes and quicker recovery. When on an antiviral regimen, I made sure to avoid sugar and yeast. Remarkably, I only caught a cold once in 2019, and despite my daughter and husband falling ill with the flu in 2020, I remained healthy. I am convinced my immunity has improved thanks to Ester-C, which I continue to reorder. Reviews guided my choice, and I hope mine is helpful too. Bless you!
6
Quick recovery
Excellent vitamin C in this convenient form. As soon as I sense a cold is coming, I take two capsules and add zinc. Usually, this helps me recover promptly without letting it worsen!
