Relative macronutrient calorie density compared to ketone bodies
| Nutrient | Energy in kcal/g | Energy in kJ/g |
|---|---|---|
| Fat | 9 | 38 |
| Alcohol | 7 | 29 |
| Protein | 4 | 17 |
| Carbohydrate | 3.75 | 16 |
| Dietary fibre | 2 | 8 |
| Ketone bodies | 4–4.5 | 17–19 |
One kilocalorie (1 kcal) is equivalent to 4.18 kilojoules (4.18 kJ)