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Sisu Ester-C 1000
4/5 stars
I have been taking Sisu Ester-C 1000 for about 6 months now and I have not experienced any stomach discomfort. I take 1 tablet, once a day and that's it. I have had great experiences with other Sisu products and trust the quality and the brand. Vitasave always has the best prices in Ester-C 1000 and I'll continue to re-order from Vitasave. The only reason this product is not getting 5 stars is due to the size of the tablets, they're on the larger size and those that have issues swallowing larger tablets may need to cut them in half.
Rating: 5 - 3 votes


Sisu Ester-C 1000

120 tablets

In stock

Product ID: S01015

Expiration: August 2017

Retail : $35.09

Vitasave: $26.39 (Save 24%)

All prices in CAD
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  • Description
  • Ingredients
  • Suggested Use
  • Reviews

Sisu Ester-C  1000


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 so 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, a 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 antioxidant bioflavonoids from citrus fruits for superior absorption
  • Ester-C® has a clinically proven higher bioavailability and retention rate than other forms of vitamin C
Medicinal Ingredients
Servings Size: 1 Tablet
Servings Per Container: 120
 Amount per Serving
Vitamin C (calcium ascorbate)1,000 mg
Calcium (calcium ascorbate*)125 mg
*from Ester-C® brand calcium ascorbate 
Non-medicinal ingredients: quercetin (100 mg), microcrystalline cellulose, magnesium stearate (vegetable), stearic acid (vegetable), silicon dioxide, croscarmellose sodium, maltodextrin, acacia, calcium carbonate.
Coating: hypromellose, vegetable glycerin.
Contains no dairy, citrus, wheat, gluten, soy or preservatives
Take 1-2 capsules daily or as directed by a health care practitioner.

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