
Regulators say they expect to find more as manufacturers seek to exploit Olympic fever to sell get-fit-quick products.
As well as drugs such as steroids and hormones investigators are searching for dangerous herbal extracts such as ephedrine, synephrine and yohimbine.
Banned products include energy and muscle gain products.
One substance called Celtic Dragon put two men in hospital with severe jaundice and liver damage. It contained adulterated steroids.