Vitamin C plasma concentration / oxidative stress

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Quoted message said:

Oxidative stress plays an important role in pathogenesis of
numerous chronic age-related free radical-induced diseases.
Improved antioxidant status minimizes oxidative damage to DNA,
proteins, lipids and other biomolecules. The results of long-term
epidemiological and clinical studies suggest that protective vitamin C
plasma concentration for minimum risk of free radical disease is higher
than 50 micromol/l. Products of oxidative damage to DNA (DNA strand
breaks with oxidized purines and pyrimidines), proteins (carbonyls) and
lipids (conjugated dienes of fatty acids, malondialdehyde) were
estimated in group of apparently healthy adult non-smoking population
in dependence to different vitamin C plasma concentrations. At
conditions of protective plasma vitamin C concentration (>50
micromol/l) were recorded significantly lower values of DNA, protein
and lipid oxidative damage in comparison with vitamin C deficient group
(<50 micromol/l). The inhibition effect of higher fruit and vegetable
consumption higher vitamin C intake higher vitamin C plasma
concentration on oxidation of DNA, proteins and lipids is expressed
also by inverse significant correlation between plasma vitamin C and
products of oxidative damage. The results suggest an important role of
higher and frequent consumption of protective food (fruit, vegetables,
vegetable oils, nuts, seeds and cereal grains) in prevention of free
radical disease.

In context those protective food like vegetables which are rich of
neutralizing antioxidans (vit C, E, carotinoids...) help to support
the acid cousin equilibrium of the body. Overacidification of body
(cause of many illnesses caused by civilization) stands in close
connection to oxidative stress. The defense of harmful affluence of
Free Radicals (which already develop with the usual energy burn process
and 'll attack the organism by accumulated external factors which are
considered as primary FR-sources) is needed to guard against oxidative
DNA damage and - by neutralizing the acided body - helps to guard
against the growth of cancer cells. Nice origination u performed, but
with your mentioned above quantity specifications I can't agree however.