A calorie is a unit of energy to measure the amount of energy in an item of food or drink and your body will use this energy to function properly. The recommended amount of calories for a man is around 2500 calories a day, and 2000 calories a day for women.
To put it simply, if you are eating more calories than you are expending, or burning, throughout the day, then you will gain bodyweight. It can be helpful to work out how many calories a day you are currently eating and then start to work out where you can bring the calories down.
You can monitor your calorie intake by using the MySugarWatch Lifestyle app to input the food you are eating.
https://mysugarwatch.je/how-to-apply/
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NHS (2023) Understanding Calories. Available at: https://www.nhs.uk/live-well/healthy- weight/managing-your-weight/understanding-calories/ (Accessed on 4 July 2023).