Weight loss treatments Mounjaro and Zepbound are the primary growth engines for Eli Lilly right now, but the company has another enormous opportunity that's getting very little attention.

Since the start of 2020, Eli Lilly’s (NYSE: LLY) stock price chart has been straight up and to the right, up 472.57% and currently trading at $756.99. The company has been around since 1876 and the stock didn’t go public until 1952 but in the last 4 years,

Eli Lilly (NYSE: LLY) stock was the picture of health on Friday. Shares of the massive American pharmaceutical company rose by more than 2% on the day, thanks largely to news from a rival. That performance was in contrast to the S&P 500's (SNPINDEX: ^GSPC) trajectory;

Eli Lilly's diverse portfolio shows broad growth, with significant contributions from oncology and other therapeutic areas. See why LLY stock is a Buy.

All told, Lilly stock still gained 33% in 2024, outperforming the S&P 500 and Nasdaq Composite. Unfortunately, Lilly investors haven't had much to celebrate so far in 2025. On Jan. 14, shares of Lilly dropped by as much as 8% and ended the day down around 6%. Year-to-date, share prices are down about 1.4%.

GLP-1 treatments such as semaglutide (under the brand names Ozempic and Wegovy) by Novo Nordisk A/S (NYSE: NVO) were likely the hottest medical sector story in 2024. With its offering of tirzepatide (branded as Mounjaro and Zepbound),