In Ester-C is the vitamin C coupled to a number of metabolites (such as aldonic acid, threoninezuur, threonate).
These metabolites contribute to an easily absorbable form of vitamin C. Ester-C consists of calcium ascorbate. Just by combining with bioflavonoids there is a good synergy.
Vitamin C contributes to the normal functioning of the immune system and to the protection of cells from oxidative damage. Vitamin C contributes to the reduction of tiredness and fatigue and to maintain the normal function of the immune system during and after strenuous exercise.