A 2017 study, also conducted on mice, discovered that raspberry ketones reduced the appetite of mice fed a high-fat diet.
Ketones are also found in kiwis, peaches, grapes and blackberries, and other vegetables including rhubarb, according to Holland and Barrett.
But raspberries are packed with several other nutrients linked to effective weight management.
The fruit is a fibre-rich source of nutrients like vitamin C, magnesium and B vitamins, which are low in fat, calories and carbohydrates.