Twitter co-founder Biz Stone has been a vegan for 10 years.

With a net-worth of around $200 million, Biz Stone ranks in the 1% of richest Americans. And after more than 10 years as a vegan, the entrepreneur in the scant group of Americans who call themselves vegan.

The 38-year-old invested in a vegan meat company, Beyond Meat, last year with Twitter co-founder Evan Williams. In an interview with Fast Company, Stone said the company's meatless chicken strips imitated the flavor and feel of the real fleshy stuff so well that "it was a bit freaky."