The U.S. Food and Drug Administration (FDA) has issued a public warning on the use of the weight loss herbal supplement Que She.

The FDA advised the public not to take the appetite suppressant because ingredients not indicated in the product's label poses harm to users with cardiovascular conditions.

Que She contains 11 Chinese herbs namely kudzu, coix seed, Chinese hawthorn, Chinese wolfberry, Chinese chrysanthemum, Chinese lotus leaf, sea tangle, semen raphani, cassia seed, green tea extract, and gymistemma pentaphyllum.

The FDA also found fenfluramine, propranolol, sibutramine and ephedrine.

Fenfluramine and ephedrine are stimulant drugs with the former withdrawn in the market in 1997 for causing serious heart valve while the latter is for asthma relief.

Propanolol poses risk to people with bronchial asthma and certain heart conditions while sibutramine is associated with increased risk of heart attack stroke in patients with heart disease.