Eli Lilly is focusing on research and manufacturing.Eli Lilly (LLY -1.65%) is a leader in one of the pharmaceutical industry's highest-growth markets: weight loss drugs. This market may increase by 16x from today's size to reach $100 billion by the end of the decade, according to Goldman Sachs Research. And right now, Lilly's two drugs prescribed for weight loss patients -- Mounjaro and Zepbound -- are bringing in billions of dollars in revenue.But Lilly isn't alone in the market, and in the coming years, t ...