The pharmaceutical company Eli Lilly & Co. took over mass production, but without an exclusive license, as the patent was transferred to the British Medical Research Council to prevent exploitation.
Macleodovo predstavitev rezultatov na srečanju "Združenja ameriških zdravnikov" 3. maja 1922 v Washingtonu, ki se je Banting in Best protestno nista udeležila, so pospremile stoječe ovacije.