Lemons as a whole food or as a juice are low in calories and therefore a great option for many diet plans. The vast majority of calories come in the form of carbohydrates with minor amounts of protein and negligible fat content. The neat thing is that we get a plethora of vitamins, minerals and antioxidants for such few calories (read more about this at lemon juice benefits).
Below are two charts, each showing the content of carbohydrates, sugar, fat, protein, fiber and calories in a lemon, and lemon juice calories respectively. It is good to note there are less overall calories in lemon juice compared to the whole flesh of lemons. There is much less fiber in the juice, and just a little more sugar. All nutrient information sourced from the USDA Nutrient Database.
Calories in Lemon
|Nutrient||Unit||Per 100.0g||Per 1 Cup||1 Fruit (2-1/8" dia)|
Calories in Lemon Juice
Fresh-made not bottled
|Nutrient||Unit||Per 100.0g||Per 1 cup||Per 1 fl oz|