The number of adults diagnosed with diabetes has more than quadrupled since 1990 and now stands above 800 million, according to new data released in The Lancet on World Diabetes Day.

Eli Lilly said on Wednesday its weight-loss drug helped nearly 99% of patients remain diabetes-free after three years of weekly injections. The results suggest that tirzepatide - the active ingredient in Lilly's diabetes drug Mounjaro and weight-loss treatment Zepbound - could prevent one new case of diabetes for every nine patients treated.

Nearly 99% of people with prediabetes and obesity or overweight who took weekly tirzepatide injections remained diabetes-free for over three years of using the drug, according to new data from the drugmaker Eli Lilly.