Chennai, Nov. 12 -- Fahad Javeed, 35, had always been sceptical about health supplements, especially when it came to losing weight. Instead, he had relied on traditional methods such as going off sugar and hitting the gym. But he would always regain the pounds once he went back to eating sugary food.

"I changed my mind about supplements when my wife started using Metabolically Lean and lost 10kg in three months. It also sorted out her longstanding bloating issue," said Chennai-based Javeed, who runs a business that offers the tech and hardware for digital screening of movies. He also started using Gut Cleanse this month.

Metabolically Lean, which promises a boost to metabolism, and Gut Cleanse, which are gut detox shots, are sold by The...