From Providence, Rhode Island, USA: Why can't you keep insulin
in the freezer and then let is thaw? Does the insulin molecule
denature? What is the temperature range that is okay in order
for the protein to remain active? Regular short acting insulin
is a solution of microcrystalline insulin in a phosphate buffer
with added zinc and bacteriostatic. The manufacturer gives
specific instructions that the product should not be frozen. If
this happens, some of the insulin may come out of solution and
not be redissolved on thawing: it is not denatured. The same is
true of the more complex forms of long acting insulin. Insulins
are stable for 28 days if kept between 36 and 86 degrees
Fahrenheit. Original posting 10 Jun 1999 Posted to Insulin Last
Updated: Tuesday April 06, 2010 15:09:03 This Internet site
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