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Iletin

Original Iletin--1923. This was made of beef and was Regular/neutral insulin. The 2 vial cartons illustrate the strengths insulin came in at the time; the carton on the left is U20 strength while the one on the right is U40.

1975 Lilly JAMA ad

Ad for Lilly insulins from a 1975 copy of the Journal of the American Medical Association (JAMA). From left-insulins Semilente ("S"), Protamine Zinc ("P"), NPH/isophane ("N"), Regular/neutral/normal ("R"), Lente ("L"), and Ultralente ("U"). The ad illustrates the different insulin strengths made over the years; as shown, Lilly didn't begin producing their insulins in U100 strength until 1973.


Eli Lilly and Company [1] is an American pharmaceuticals giant from Indianapolis. Eli Lilly has been producing insulins commercially since 1923.

Studies done on all Lilly vialed insulins--Humulin, Iletin, and Humalog, show that the stoppers have sufficient resealing properties to maintain a good seal after 100 punctures. What this means to you is that the insulin will stay potent longer. [2]

More on the company and its products here.

References

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