From: "Phosphor" <[log in to unmask]>

 > "[in] carrot juice there are large quantities of
microelements...b-carotene
 > (vitamin A), vitamins B6 and B12)."
 >
 > this is wrong since there is no vitamin A or B12 in any plant substance.
 > [except for some b12 in fermented plant foods derived from the bacteria].

 From National Institute of Health article, found at:

http://www.cc.nih.gov/ccc/supplements/vita.html

 > Vitamin A is a family of fat-soluble vitamins. Retinol is one of the
 > most active, or usable, forms of vitamin A, and is found in animal foods
 > such as liver and eggs and in some fortified food products.
 >
 > Retinol is often called preformed vitamin A. It can be converted to
 > retinal and retinoic acid, other active forms of the vitamin A family
 > (1-4).
 >
 > Some plant foods contain darkly colored pigments called provitamin A
 > carotenoids that can be converted to vitamin A. In the U.S.,
 > approximately 26% and 34% of vitamin A consumed by men and women is
 > provided by provitamin A carotenoids (1).
 >
 > Beta-carotene is a provitamin A carotenoid that is more efficiently
 > converted to retinol than other carotenoids (1-4).
 >
 > For example, alpha-carotene and b-cryptoxanthin are also converted to
 > vitamin A, but only half as efficiently as beta-carotene (1).

and later:

 > Provitamin A carotenoids are abundant in darkly colored fruits and
 > vegetables.