active in cell metabolism . The name arises because it was
once considered a single vitamin, much like Vitamin C or Vitamin D .
Since later research has shown it is in fact a complex of chemically
distinct vitamins that happen to often coexist in the same foods, the
name has gradually declined in use, being replaced by the generic term
"the B vitamins" , the vitamin B complex , or by the specific names of
each vitamin.
Vitamin C is a nutrient required in very small amounts to allow a range
of essential metabolic reactions in the body. Vitamin C is principally known
as a water - soluble anti-oxidant and has been found to prevent scurvy . It is
also known by the chemical name of its principal form, L-ascorbic acid or simply
ascorbic acid . The guidance provided by the United States of America and Canada for
Dietary Reference Intake (DRI) recommends 90mg per day and no more than 2g per day (2000mg/day).
The article on ascorbic acid contains information on its chemical properties.
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