Capitalization of Regular/regular varies from one author (or organization) to another, so no wonder you're perplexed.
The word "insulin" isn't capitalized.
Regular insulin is a form of short-acting insulin, usually lasting less
than 8 hours, nowadays usually of synthetic human origin, but also of beef
or pork origin.
Regular is sold by all insulin companies:
by Novo Nordisk as
Regular Human Insulin (Novolin R) (human) and other names;
by Eli Lilly as
Humulin R (human),
Regular Iletin II (purified pork), and
Regular Insulin (animal source);
and (in Europe and many other parts of the world) by Aventis as Insuman rapid (human).
It is not the fastest-acting insulin, as the insulin analogs
Humalog
(insulin lispro, from Lilly),
Novolog
(insulin aspart, from Novo Nordisk),
and
Apidra
(insulin glulisine, from Aventis) all work
faster, and don't last quite as long.
wwq
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