Ester-C 90

Weight: 175g

Productnumber: 1201090

90 tablets with 1000 mg Ester-C® (calcium ascorbate with vitamin C metabolites) and 100 mg citrus bioflavonoids

  • Ester-C® is the most powerful form of vitamin C
  • Contains threonic acid, the biological active metabolite of vitamin C
  • Is absorbed faster in the blood stream
  • Leads to higher vitamin C blood levels
  • Does not cause gastrointestinal upset
  • Contains bioflavonoids
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  • 15% for > €300,- orders
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The name 'Ascorbic acid' has a direct connection with the ability of vitamin C to prevent scurvy (A-scorbut is Latin for anti-scurvy). Vitamin C in the form of ascorbic acid has been available as a dietary supplement for over 30 years. The acidity of ascorbic acid has been known to cause stomach and digestive problems.

A new form of vitamin C was introduced about ten years ago in the form of calcium ascorbate. The pH-neutral dietary supplement, in which the ascorbic acid is chemically bound with calcium, does not have the disadvantages of the acid form.

Ester-C is considered the third generation of vitamin C. It is a unique, patented form of vitamin C with many important advantages compared to the other vitamin C forms.

As soon as vitamin C is absorbed by the body, it is broken down into several metabolites, the most important being threonic acid. Threonic acid and the other metabolites are important in making vitamin C available to the body. In addition, threonic acid has the ability to mobilize previously stored vitamin C and to make it again available to the body. Research has shown, Ester-C has the following advantages compared to 'ordinary' vitamin C (ascorbic acid):

  • It is absorbed faster into the blood stream;
  • It leads to higher vitamin C blood levels;
  • It is maintained longer by the body;
  • It does not cause gastrointestinal upset
  • It does not affect tooth enamel.
The bioflavonoids in Ester C are vitamin C synergists: they improve the vitamin C absorbance.

Vitamin C offers many health benefits, of which the following have been officially approved by the new European Legislation: 
  • Vitamin C contributes to the normal function of the immune system, including during and after intense physical exercise
  • Vitamin C contributes to normal energy-yielding metabolism, and contributes to the reduction of tiredness and fatigue
  • Vitamin C contributes to normal functioning of the nervous system, and contributes to normal psychological function
  • Vitamin C contributes to the protection of cells from oxidative stress
  • Vitamin C contributes to normal collagen formation and contributes to the normal function of blood vessels, bones, cartilage, skin, gums and teeth
  • Vitamin C contributes to the regeneration of the reduced form of vitamin E
  • Vitamin C increases iron absorption

The human body is unable to synthesize vitamin C, which makes us completely dependent of nutrition. Vitamin C is water-soluble and found all over the body. .

Ester-C© is a patented form of pH-neutral vitamin C (Calcium ascorbate) and natural metabolites. Ester-C© is produced by The Ester-C Comp., Inc. The production process is patented under US Patents Nr. 4.822.816 and 5.070.085.




Each tablet contains:     %RDA 
Ester-C ©(Calciumascorbate and metabolites) 1000 mg  -
Ascorbic acid (Vitamin C) 790 mg 990%
Calcium (as ascorbate) 90 mg 11%
Citrus Bioflavonoids 100 mg -

Other ingredients: Bulking agent, (microcrystalline cellulose or cellulose gel), glazing agent (stearic acid, Hydroxypropylmethyl Cellulose magnesium stearate, glycerol) bulking agent (sodium carboxymetyl cellulose or cellulose gum, silicon dioxide).  

Adults:  take 1 -2 tablets daily, or as recommended.  Best taken with meals. 

Children: Calculate according to body weight.


Ingredients: Vitamin Ester-C, Bulking agent, (microcrystalline cellulose or cellulose gel), bioflavonoid complex, glazing agent (stearic acid, Hydroxypropylmethyl Cellulose magnesium stearate, glycerol) bulking agent (sodium carboxymetyl cellulose or cellulose gum, silicon dioxide). 

Free from: yeast, sugar, starch, lactose, gluten, artificial flavors, colors or preservatives. 

Dietary supplement, containing vitamin C and bioflavonoids.

Do not deviate from recommended dosage. Do not take if the product has expired

Storage: Store in a dark, dry place at room temperature. Keep out of reach of children. 

Obligatory statement: A dietary supplement cannot be considered a replacement for a well-balanced meal. 

In case of pregnancy, lactation, medicin use or disease consult a physician before using food supplements.


Scienctist believe, millions of years ago a spontaneous mutation took place in the genetic material of our ancestors, resulting in the loss of the ability to produce vitamin C. Ever since this event, primates (such as humans) completely depend on nutrition for vitamin C. An interesting theory is, the loss of ability to synthesize vitamin C may have accelerated the evolution of the human race. After all, vitamin C is such an important anti-oxidant that its loss must have significantly increased the formation of free radicals, inducing frequent DNA mutations. As a result, many species of primates evolved in rapid succession, one of which evolved to the ancestor of modern mankind. 


The Recommended Daily Allowance (RDA) for adults in Europe is 80 mg vitamin c per day. However, there is great consensus amonst scientists about the Maximal Safe Dosage,  which is many times higher.  

The Optimal Amount of vitamin C necessary to fully meet the body demand, is difficult to estimate. It is interesting to realize, nearly all animals are capable to produce their own vitamin C. Exceptions are all primates (next to humans), the guinea pig, the rainbow trout and the coho salon.

The table below shows the amount of vitamin C, synthesized by several mammals. A differentiation is made between healthy, unstressed animals and sick or stressed animals.

  Production Vitamin C
  (mg/kg body weight/dag)
Species Low High
  (no stress) (stress)
Goat 33 190
Sheep 25  
Rat 39 199
Mouse 34 275
Rabbit 9 226
Cat 5 40
dog 5 40
Humans - -

 Table: Vitamin C production in mammals (after 1)

Table above shows, vatamin C production in animals may vary enormously. When seriously sick or stressed, a goat may produce 6 x the amount of vitamin C compared to healthy / unstressed situation; a rabbit even 25 x as much! Converting the values of l to an average human with a body weight of 70 kg, would lead to an astonishing conclusion:

A healthy adult would need to consume 0,4 – 3 gram vitamin C on a daily base to equal the vitamin C status of healthy, unstressed mammals. In case of stress and/or physical disease, an adult would need to consume 3 – 17 gram vitamine C  on a daily base to equal to vitamin C status of mammals in similar conditions. 

Two-fold Nobel price winner Linus Pauling studied the behavior of anthropoids (such as gorilla's) in the wild and  found they consume huge amounts of vitamin C. Based on his findings, Linus Pauling recommended adult humans to consume 2,3–10 gram vitamin C on a daily base.

1) Bland, J.:Vitamine C: the fututre is now. Keats Publishing, Inc., 1995)