Your supplements might not contain what's on the label. The US's leading expert shared 3 tips for buying safe products that are right for you.

Office of Dietary Supplements/ Getty Images

From colostrum and creatine to lion's mane, it feels like every few months there's a buzzy new supplement and debate over whether it works. But another equally important question — the quality and contents of the product you choose — often gets less attention, US' top supplement expert told Business Insider.