Very important vitamine because :Ascorbic acid is a powerful reducing agent controlling the redox potential within cells. It is involved in the hydroxylation
of proline to hydroxyproline, which is necessary for the formation of collagen. The failure of this biochemical pathway
in vitamin C defiiency accounts for virtually all of the clinical effects seen.Humans, along with a few other, are unusual in not being able to synthesize ascorbic acid from glucose. Vitamin C is present in all fresh fruit and vegetables.
Unfortunately, ascorbic acid is easily leached out of vegetables when they are placed in water and it is also oxidized todehydro-ascorbic acid during cooking or exposure to copperor alkalis. Potatoes are a good source as many people eat alot of them, but vitamin C is lost during storage.
It has been suggested that ascorbic acid in high dosage (1–2 g daily) will prevent the common cold. While there issome scientifi support for this, clinical trials have shown no signifiant effect. Vitamin C supplements have also been advocated to prevent atherosclerosis and cancer, but again a clear benefi has not been demonstrated.Vitamin C defiiency is seen mainly in infants fed boiled milk and in the elderly and single people who do not eat vegetables.
of proline to hydroxyproline, which is necessary for the formation of collagen. The failure of this biochemical pathway
in vitamin C defiiency accounts for virtually all of the clinical effects seen.Humans, along with a few other, are unusual in not being able to synthesize ascorbic acid from glucose. Vitamin C is present in all fresh fruit and vegetables.
Unfortunately, ascorbic acid is easily leached out of vegetables when they are placed in water and it is also oxidized todehydro-ascorbic acid during cooking or exposure to copperor alkalis. Potatoes are a good source as many people eat alot of them, but vitamin C is lost during storage.
It has been suggested that ascorbic acid in high dosage (1–2 g daily) will prevent the common cold. While there issome scientifi support for this, clinical trials have shown no signifiant effect. Vitamin C supplements have also been advocated to prevent atherosclerosis and cancer, but again a clear benefi has not been demonstrated.Vitamin C defiiency is seen mainly in infants fed boiled milk and in the elderly and single people who do not eat vegetables.
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