What’s the best diet plan? USC doctors evaluate 4 popular trends

Before trying that trendy diet your friends raved about on Instagram, learn the science behind them first.

"Thinking of trying that trendy diet your friends raved about on Instagram? Before you’re ready to declare the latest celebrity fad the best diet plan, check the science first. While many diets promise quick weight loss, they often have a downside. We asked two USC experts to help us separate truth from hype for four popular diets that many claim to be the best diet plan."