I read Prof. Linus Pauling's book on Vitamin C.
Never mind the title "How to live longer..." etc., what Prof. Pauling claimed is that the FDA DRD (daily recommended dose) of Vitamin C is about 200 times LESS than what we actually need.
He based this claim on two factors:
1) most mammals are capable of synthesizing (creating) Vitamin C within their own system, namely in the liver; humans are not capable of this.
2) those mammals which DO produce their own Vitamin C, produce it in proportion to their own body mass, in amounts which, in a "normal, healthy human" would mean about 1200 mg/day.
The FDA DRD is 60 mg.
Why so low ?
The same, apparently, with other vitamins such as B1, B2 and B12, not to mention Vitamin A (produced in the liver).
Mediterranean Europeans happen to eat regularly liver and kidney from beef, pork or lamb as a normal part of their diet,
but in Northern Europe (hence, in North America) liver and kidneys are often considered "offal" and as such "dirty"
"poor man's meat"
if not "dog food"
Prof. Pauling was a Nobel Prize for Chemistry AND a Nobel Prize for Peace (for his campaigning to end nuclear test blasting).
Incidentally, in the early 1970's he foresaw the 1975-76 epidemic of swine flu, and saw right.
He also identified the 1918-1919 "Spanish Flu" which wreaked havoc in both Europe and USA as swine flu.
Pfizer and the WHO insisted we take a vaccine for swine and bird flu the last few years, I simply had Vitamin C and never even had the "normal" flu...
I consider HIM to be a good point of reference.
AND
He's American, from Oregon.
See also "Orthomolecular Medicine" and "Megavitamins".