How much energy does one gram of fat provide?

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A woman with curly hair and a handbag shops at a busy outdoor farmer's market in Bulgaria, surrounded by stalls filled with fresh fruits and vegetables. — nutrition Vegetables are an important part of a balanced diet.

One gram of fat provides 9 kilocalories (38 kilojoules) of energy.1

On a weight basis, fat contains more than twice as much energy as either carbohydrate or protein, both of which provide approximately 4 kilocalories (17 kilojoules) per gram.12