Xenadrine, Metabadrine Contain Naturally Occurring Ephedrine Alkaloids

There is a difference between ephedrine alkaloids and synthetic ephedrine. Ephedrine is only one of the naturally occurring alkaloids present in Ephedra extracts. Other alkaloids include pseudoephedrine (which is less potent than ephedrine) and alkaloids that slow the absorption of ephedrine from the digestive tract and/or counteract the stimulant effects of the ephedrine in the extracts.

However, synthetic ephedrine, which is used in a number of common cold remedies, is not a naturally occurring substance. Synthetic ephedrine can be easily identified on the label of these cold products as "ephedrine hydrocloride."

The majority of Ephedra products contain naturally occurring ephedrine alkaloids. Industry standards and some state laws prohibit the use of synthetic ephedrine in Ephedra dietary supplement products. If a product contains synthetic ephedrine, it is not recommended that you not purchase the product.