Lemons are high in heart-healthy vitamin C and several beneficial plant compounds that may lower cholesterol. Lemon juice may help prevent kidney stones as well as lemons contain vitamin C and citric acid, which help you absorb non-heme iron from plants. This may prevent anemia. The soluble fiber in lemons could help improve digestive health. However, you need to eat the pulp of the lemon, not just the juice. Lemon can boost immune system by squeezing a whole lemon into a glass of hot water with a large spoonful of honey makes a soothing drink for someone with a cough or cold.