SISU Ester-C Chewable

    Description & Features

Vitamin C is a factor in the maintenance of good health, wound healing and in the normal development and maintenance of bones, cartilage, teeth and gums.


  • 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
  • Ester-C® has a clinically proven higher bioavailability and retention rate than other forms of vitamin C
SISU Advantages:
  • High-potency chewable tablets for those wanting to supply their vitamin needs with fewer pills
  • All natural flavours and sweeteners
  • Suitable for vegans
  • Contains no ingredients that are a source of gluten
  • Good Manufacturing Practices standards
  • Tested for guaranteed purity and potency
  • NPN approved


  • Medicinal: (per tab)Vitamin C...500 mg from Ester-C® brand calcium ascorbate and sodium ascorbate
  • Non-Medicinal: stevia, dextrose, fructose, citric acid, guar gum, stearic acid (vegetable), magnesium stearate (vegetable), silicon dioxide. Plus natural orange flavour, turmeric extract, beet root extract.
Dosage: (Adult) Take 1 tablet daily or as directed by a health care practitioner.

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We are only able to ship this item to Canadian customers.
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Other SISU Products

Rated 4 out of 5 by from Good vitamin C source From my reading I feel Ester C is an excellent source of Vit C. I like these chewable a lot, only gave 4 stars because the taste is not the greatest. I chew them up with some better tasting Vit D tablets.
Date published: 2021-03-27
Rated 5 out of 5 by from Great product! My family and I love this vitamin C. It tastes good and provides a good boost to our immune system and is reasonably priced! This is the best vitamin c on the market in our opinion! :)
Date published: 2020-04-24
Rated 5 out of 5 by from Great taste We love SISU brand, and these didn’t disappoint. I actually give these to my daughter. Cheaper per unit than the kids version and also have a great taste.
Date published: 2020-08-13
Rated 5 out of 5 by from best brand sisu is the best vitamin brand. they are my go to in most cases!! love the taste of these chewables. makes it easy to take regularly
Date published: 2022-02-13
Rated 5 out of 5 by from My kids hate swallowing pills and this is a great alternative. It is chewable and they like the taste!
Date published: 2022-03-25
Rated 5 out of 5 by from Great Vit C source I like these chewables. Not too sweet. My research said this is one of the better absorbed supplement.
Date published: 2020-11-25
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