A mushroom used for centuries in Chinese medicine reduces weight gain in animals, say researchers in Taiwan.

The study, published in Nature Communications, suggested Ganoderma lucidum slowed weight gain by altering bacteria in the gut.

The researchers suggested the mushroom could eventually be used in the treatment of obesity.

Experts said the science was good, but putting mushroom extract in cans of cola would not help people lose weight.

G. lucidum has traditionally been sold for "health and longevity" say researchers at Chang Gung University.

They analysed the impact of the fungus on mice being fed a high-fat diet.