I'm surprised that no-one has mentioned that Avidin is only found in the egg whites and is a one-one biotin blocker. Biotin is found in the yolks.
If you eat the uncooked eggwhites alone, it will block biotin from other sources (like liver) as well.
Avidin is a glycoprotein found in raw
egg white. It combines
stoichiometrically with biotin. The
toxic effect of uncooked egg white
which causes a syndrome similar to
that of vitamin B deficiency (Boaz
1924) led to the discovery of the
vitamin biotin (Gyorgy 1931, 1939).
The toxic factor, first isolated by
Eakin et al. (1940, 1941) who named it
avidin, combines with the essential
growth factor resulting in a
"non-digestible" avidin-biotin complex
which is not absorbed from the
intestine or from the surrounding
medium by microorganisms. Avidin plays
an important role in biotin function
studies and in the study of several
enzymes in which biotin is a coenzyme.
Avidin or avidin subunits bound to a
matrix have been utilized for affinity
purification (Berger and Wood, 1975;
Green and Toms, 1973).
You Really Need Biotin to be bioavailable, so avoid uncooked egg whites.
WHY YOU NEED BIOTIN
Biotin activates carboxylases!
Each carboxylase catalyzes an essential metabolic reaction:
- Acetyl-CoA carboxylase I and II catalyze the binding of bicarbonate to acetyl-CoA to form malonyl-CoA. Malonyl-CoA is required for the synthesis of fatty acids. The former is crucial in cytosolic fatty acid synthesis, and the latter functions in regulating mitochondrial fatty acid oxidation.
- Pyruvate carboxylase is a critical enzyme in gluconeogenesis—the formation of glucose from sources other than carbohydrates, for example, amino acids.
- Methylcrotonyl-CoA carboxylase catalyzes an essential step in the catabolism of leucine, an essential amino acid.
- Propionyl-CoA carboxylase catalyzes essential steps in the metabolism of certain amino acids, cholesterol, and odd chain fatty acids (fatty acids with an odd number of carbon molecules).
When I do eat raw eggs, I'm just eating the yolk.
YUMMY! Part of Mayo is very good for you.
Just make sure that they are free-range/organic to make sure you have lowered your salmonella chances.