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Raw egg update
The two arguements against feeding cats raw eggs are the same as for feeding
humans raw eggs: 1) The glycoprotein named avadin in the uncooked "white" part binds to and prevents absorption of the biotin found in the yolk. It is a known fact that this not only results in nonabsorption of the yolk's biotin, but if this practice is a regular and frequent part of the diet, then it will eventually result in a biotin deficiency unless biotin suppements are given/taken. 2) It is believed that there is a high enough probability of salmonella infection resulting from consumption of raw eggs, that the healthy benefits of eating them do not warrant the risk of being poisoned by salmonella. Some people believe that with regards to #1 that there is more than enough biotin in the yolk to offset the bind-up losses due to avadin. This belief is a fallacy. Dr. Sharma, PhD, who is a biochemist with Bayer says that 5.7 grams of biotin are required to neutralize all the avidin found in the raw whites of an average-sized egg. But there are only about 25 micrograms (25 millionths of a gram) of biotin in an average egg yolk. So for practical purposes this leaves the consumption of raw yolks (only) as a remaining possibility. The probability of a salmonella infection from the consumption of raw egg yolk can be reduced to a safe and extremely improbable level if the following advice is practiced: A. Healthy chickens in healthy environments don't contract/transmit salmonella. So the risk virtually disappears with high quality, cage free, organically fed, omega-3 enhanced chicken eggs. B. Follow the raw egg handling and inspection tips at http://www.mercola.com/2002/nov/13/eggs.htm Note: Mercola was wrong about his baseless unfactual statement concerning the adequate content of biotin in egg yolk. He later took that back in a follow-up article published this year. C. Liquid grapefruit seed (not grape seed) extract can be diluted in water and used as a naturally excellent salmonella-cide. Such a dilute solution can be used as a disinfecting bath for the external surfaces of any number of unopened egg shells; where the germs will likely be, if present at all. |
#2
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Hmmm... After some simple arithemetic I conclude that even without
consumption of the separated "white" part, a salmonella-free raw egg yolk is still unhealthy for consumption. If we assume a 100% complete reaction between biotin and avidin, then after separating the yolk from the white, any residue of the raw white greater than or equal to 0.00004% of the total amount of "white" originally in the egg will negate all of the yolks's biotin. Since it's practically impossible to separate the yolk from the white so completely, the conclusion is that biotin is impossible to obtain from a raw yolk. So a minute amount of raw egg "white" residue still clinging to a yolk after yolk-white separation contains enough avadin not only to negate the biotin in the yolk, but to scavenge biotin within the body (after it is digested and absorbed). "Knack" wrote in message nk.net... The two arguements against feeding cats raw eggs are the same as for feeding humans raw eggs: 1) The glycoprotein named avadin in the uncooked "white" part binds to and prevents absorption of the biotin found in the yolk. It is a known fact that this not only results in nonabsorption of the yolk's biotin, but if this practice is a regular and frequent part of the diet, then it will eventually result in a biotin deficiency unless biotin suppements are given/taken. 2) It is believed that there is a high enough probability of salmonella infection resulting from consumption of raw eggs, that the healthy benefits of eating them do not warrant the risk of being poisoned by salmonella. Some people believe that with regards to #1 that there is more than enough biotin in the yolk to offset the bind-up losses due to avadin. This belief is a fallacy. Dr. Sharma, PhD, who is a biochemist with Bayer says that 5.7 grams of biotin are required to neutralize all the avidin found in the raw whites of an average-sized egg. But there are only about 25 micrograms (25 millionths of a gram) of biotin in an average egg yolk. So for practical purposes this leaves the consumption of raw yolks (only) as a remaining possibility. The probability of a salmonella infection from the consumption of raw egg yolk can be reduced to a safe and extremely improbable level if the following advice is practiced: A. Healthy chickens in healthy environments don't contract/transmit salmonella. So the risk virtually disappears with high quality, cage free, organically fed, omega-3 enhanced chicken eggs. B. Follow the raw egg handling and inspection tips at http://www.mercola.com/2002/nov/13/eggs.htm Note: Mercola was wrong about his baseless unfactual statement concerning the adequate content of biotin in egg yolk. He later took that back in a follow-up article published this year. C. Liquid grapefruit seed (not grape seed) extract can be diluted in water and used as a naturally excellent salmonella-cide. Such a dilute solution can be used as a disinfecting bath for the external surfaces of any number of unopened egg shells; where the germs will likely be, if present at all. |
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