Viking says an early-stage study of its obesity pill VK2735 showed adults on the highest dosage lost 8.2% of their body weight in four weeks.

Analysts have struggled to estimate the size of the compounded market for weight-loss drugs because their sale is not tracked in traditional channels.

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.