<span>- proteins: 1 gram of protein provides 4 kcal or 17 kJ,
- carbohydrates: 1 gram of carbohydrate brings 4 kcal or 17 kJ,
<span>- lipids: 1 gram of lipid brings 9 kcal or 37 kJ,</span></span>
You may never ride at night. It is even stated on most bicycle labels.
