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Hi Kent,

Thanks for the extra information.

In the debate on bovine growth hormone, does the fact that it is usually recombinant BGH (that is, made by a bacterium or yeast [not sure which]) matter? If so, I wonder why.

Recombinant proteins (rBGH is one such) are much cheaper to produce in large quantities, compared to collecting from the animal or plant that normally makes the protein. We've been using them for years. Insulin for diabetics, for instance, used to be collected from sheep, but is now made in a vat by bacteria. I would venture to say that all biological drugs (proteins) are made in a vat and their safety is tested thoroughly. (That is, I'm referring to the safety of the manufacturing, not to the safety of the drug, which is a different issue.)

Or is the debate on BGH there regardless of source for the protein?

Cheers,
Jim

Aside: While Googling "rbgh manufacturing" found the following link to a 2000 decision by the FDA to not reverse its 1993 decision to allow Monsanto to sell Posilac (its branded rBGH). http://www.fda.gov/AnimalVeterinary/NewsEvents/CVMUpdates/uc...
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