This is Arokiaswamy Velumani’s formidable rags-to-riches story of how he steadfastly overcame the challenges of poverty, disrupted the diagnostics industry, and made thyroid testing affordable and available to millions of Indians. A scientist-turned-entrepreneur, he built a zero-debt unicorn with an initial investment of around Rs1 lakh. However, in 2021, he sold this company to PharmEasy for over Rs4,500 crore. In an exclusive interview on Forbes India Pathbreakers, he talks about how he built the world's largest thyroid testing centre, the curious case of new-age entrepreneurs’ business strategies, his unconventional take on philanthropy, and his business plans. Imitating his favourite actor Rajinikanth’s dialogue from a film, he says, “My path will always be a bit different.” Edited excerpts: