> However, according
 > to 'USDA Table of Nutrient Retention Factors Release 4', the retention
 > factor for vitamin C in beef is between 80 and 85 procent. The vitamin C
 > retention factor for reheating beef is 95 procent.

WHt doe nutrient retention factor means? WHat survive the cooking ? or what
is lost ?

 > I don't know the value for beef or any other ruminant. I wish I knew.
 > There's nothing in the USDA Nutrient Database, as you may have noticed
 > yourself. However I've read [1] that the human adrenal gland contains at
 > least 140 umol vitamin C per 100 g. I think that's around 25 mg per 100 g.
 > Sounds little, because according to the same source, and as you surely
 > know, the gland in question is one the richest sources of vitamin C in the
 > human body.

and adrenals are so small just few grams  each , that sounds stange .

  <(Same goes for pituitary glands and lens of the eye.)

also rich in vit c?

jean-claude