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Sisu Ester-C Supreme

210 Vegicaps

Product ID: S01109

Sisu Ester-C Supreme
5/5 stars
As usually the product is great. I use it as a base for daily care as allergies are tough in the spring and Summer but this helps my immune system.
Rating: 4.83 - 6 votes

Expiration: March 2020

97% of 100

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Retail: $63.99
Vitasave: $49.99 (Save 21%)

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Sisu Ester-C Supreme


Vitamin C is a water-soluble antioxidant and one of the best researched nutrients. Most mammals can produce vitamin C as they need it but the human system evolved without this ability, therefore we must ensure an adequate daily intake to stay healthy. Vitamin C is found in fruits and vegetables, but it is easily destroyed by heat, cooking, processing, and storage, and rapidly eliminated from our system in the urine. Inadequate levels of vitamin C may be seen in cases of physical and mental stress, older people and those with chronic conditions including cardiovascular disease, asthma, arthritis, age-related eye disease, and certain cancers. Vitamin C is best known for strengthening the immune system by supporting and improving white blood cell function. It is also essential for the proper formation of collagen, the building block of many tissues and a crucial component in skin rejuvenation. Vitamin C also helps to reduce histamine release in the body, thereby alleviating allergy symptoms. There are numerous forms of vitamin C with ascorbic acid being the most basic. People wanting a clinically proven form that is easier on the system than ascorbic acid may choose a form like Ester-C® brand calcium ascorbate.



  • Ester-C® is a unique, patented form of calcium ascorbate, which is made when ascorbic acid (regular vitamin C) is buffered with calcium using a water-based process
  • The calcium in Ester-C® provides part of your daily calcium requirements
  • Ester-C® contains active vitamin C metabolites including L-threonate which enhance cellular absorption and retention
  • Ester-C® is the only form of vitamin C that has been proven to last up to 24 hours in the white blood cells of the immune system
  • Less acidic and easier on the stomach than ascorbic acid
  • Enhanced with quercetin, a bioflavonoid and powerful antioxidant with anti-inflammatory and anti-histamine properties
  • Added bioflavonoids from berry fruits for superior vitamin C absorption
  • Arabinogalactan is a type of polysaccharide that offers additional immune support during stressful times and the cold and flu season
  • Ester-C® has a clinically proven higher bioavailability and retention rate than other forms of vitamin C
  • Formulated with citrus-free ingredients for people wishing to avoid citrus
Medicinal Ingredients
Servings Size: 1 Veg Caps
Servings Per Container: 210
  Amount per Serving
Vitamin C (calcium ascorbate) 638 mg
from Ester-C® brand calcium ascorbate  
Arabinogalactan (Larix occidentalis) bark 100 mg
Quercetin (fruit) 50 mg
Multianthocyanidins (berry/fruit*) 50 mg
*bilberry, cranberry, black currant, grape  
Non-medicinal ingredients: magnesium stearate (vegetable).
Capsule shell: hypromellose.
Contains no dairy, wheat, gluten, peanuts or soy.
Adult dosage: Take 1-2 capsules daily or as directed by a health care practitioner.
  • Reviews (6)
Verified Buyer
100% of 100
The best!
I take only this one for several years. It's better researched, absorbed and friendly for your stomach. Plus very good other ingredients - quercetin for example.
Verified Buyer
80% of 100
Great Product!!
I have been using this for years to help with colds and for the immune system.
Verified Buyer
100% of 100
SISU Ester C-Supreme
This is a consistently great vitamin C product; mainly because it's more than 'basic C'. I look for product combinations that add high value, and this supplement is definitely one of those.
Verified Buyer
100% of 100
.Product does not have the the original composition
the product is not the same as the one I used to buy. Many ingredients are missing in this new bottle and I don't think I will continue to buy this brand
Verified Buyer
100% of 100
Sisu Ester-C Vitamin great taste
Sisu Ester-C Vitamin great taste Vitamin Czech with no citrus ingredient. Best Viramin C I ever bought!!!
Verified Buyer
100% of 100
Great Immune Support
As usually the product is great. I use it as a base for daily care as allergies are tough in the spring and Summer but this helps my immune system.

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