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Posted April 6, 2016

FDA Warns of Stimulant Methylsynephrine In Supplements

On March 31, 2016, the FDA issued warning letters to seven companies selling products containing methylsynephrine (also called p-hydroxyephedrine or Oxilofrine), a stimulant drug which is not permitted in dietary supplements in the U.S.

Most of the products are marketed for weight loss or "fat burning;" some contain additional ingredients which are not permitted in dietary supplements. Use the links below to read the warning letter for each company: Update: A study published on April 7, 2016 reports large doses of methylsynephrine were found in a number of weight supplements sold in the U.S. See the Warning for more information.

For more warnings and recalls, use the link below.

See Related Warnings:

Large Doses of Stimulant Methylsynephrine Found In Weight Loss Supplements

FDA Identifies More Products Listing Synthetic Amphetamine

Does Your Weight Loss or Sports Supplement Contain Synthetic Amphetamine?

FDA Warns Companies Selling Products Containing Picamilon

Study Finds Some Vinpocetine Supplements Contain No Vinpocetine

FDA Targets Weight Loss and Workout Supplements Listing Synthetic Stimulant DMBA

New Synthetic Stimulant Found in Supplements