Sisu Ester-C 600 Bonus Size

by Sisu
Product ID: S01127
ON SALE Extra 10% OFF applied at cart
Retail Price:

Vitasave: $28.99
   Save 19%

Sisu Ester-C 600


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 Softgel
Servings Per Container: 150
Amount per Serving
Vitamin C (calcium ascorbate) 600 mg
from Ester-C brand calcium ascorbate
Bioflavonoids (citrus fruit) 100 mg
Calcium (from Ester-C brand calcium ascorbate) 80 mg
Non-medicinal ingredients: magnesium stearate (vegetable).
Capsule shell: hypromellose.
Contains no dairy, peanuts, wheat, gluten or soy.
Take 1-2 capsules daily or as directed by a health care practitioner.

Recently viewed items

Clear recently viewed

Customer Reviews

Based on 6 reviews
Cathy in Edmonton

This Vit. C is buffered with calcium so that it does not bother the stomach for those who are sensitive to the acid in some citrus fruits. It has been very effective for me especially because I have chronic sinusitus. Highly recommend both the one with citrus bioflavonoids and Supreme with berry bioflavonoids that I use.

Anna K.
Excellent product

I’ve been using Sisu Vitamin C supplements for a while now and find them to be easy on the stomach and very effective.

Chita Windsor

I love this product Ester - C Vitamins I've been taking this for a years, and Calcium Magnesium, so far I'm found out is good kind of supplement.

Sandra T.
Immune system boost

This is the first time I’ve used this product and so far I haven’t noticed any change health wise, good or bad but I know vitamin c is really good to boost the immune system and especially Ester C. I’ll continue to buy these.

karen w.
Good but expensive

Good but expensive