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Trainers and industry participants have previously been warned by Racing NSW Stewards that the substance synephrine is considered under the Australian Rules of Racing to be a prohibited substance as it is an “adrenergic stimulant” known to affect the metabolism of body fat, and has been demonstrated to cause an increase in blood pressure in human subjects consuming synephrine orally.

Synephrine is traditionally found in the peel extract of bitter orange (also called Seville orange). Bitter orange is an ingredient in a number of herbal preparations and nutritional supplements which are promoted to aid in weight loss and to suppress appetite in humans.

Please click on the following link to read the full release from Racing NSW Stewards - NOTICE: Warning regarding the detection of synephrine