Some stocks have the "it" factor. They've got such tremendous growth prospects that investors want to add them to their portfolios without any hesitation.

Three Motley Fool investors think they've found three such unstoppable stocks to buy sooner rather than later. Here's why they like Eli Lilly (NYSE: LLY), Novo Nordisk (NYSE: NVO), and Vertex Pharmaceuticals (NASDAQ: VRTX).

David Jagielski (Eli Lilly): Although it's up around 70% this year, Eli Lilly is a stock that's still nowhere near its peak. The business has some incredible drugs in its portfolio that could lead to tens of billions of dollars in revenue in the years ahead.

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Source Fool.com