Beta-Carotene Description
Beta-Carotene -
Beta-Carotene
is from the family of fat-soluble vitamins and is also known as
Vitamin A. Retinol is one of the most active, or usable, forms of
Vitamin A, or Beta-Carotene, and is found in animal foods such as
liver and eggs and in some fortified food products.
Retinol is often called
preformed Vitamin A and it can be converted to retinal and retinoic
acid, other active forms of the Vitamin A family. Some plant foods
contain darkly colored pigments called provitamin A carotenoids that
can be converted to Vitamin A.
Beta-carotene is a provitamin A carotenoid that is more efficiently
converted to retinol than other carotenoids.
Beta-Carotene
plays an important role in vision, bone growth, reproduction, cell
division and cell differentiation. Vitamin A
helps maintain the surface
linings of the eyes and the respiratory, urinary, and intestinal
tracts. When those linings break down, bacteria can enter the body
and cause infection. Vitamin A also helps maintain the integrity of
skin and mucous membranes that function as a barrier to bacteria and
viruses. Vitamin A also helps regulate the immune system. Some
carotenoids, in addition to serving as a source of Vitamin A, have
been shown to function as antioxidants in laboratory tests.
Antioxidants protect cells from free radicals, which are potentially
damaging by-products of oxygen metabolism that may contribute to the
development of some chronic diseases.
Beta-Carotene
is found in animal foods such as whole eggs, whole milk and liver.
Most fat free
milk and dried nonfat milk solids sold in the
US
are fortified with Vitamin A to replace the Beta-Carotene lost when the
fat is removed. Fortified foods such as fortified breakfast cereals
also provide Beta-Carotene.
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