The citrus fruit that is the highest in Vitamin C is Oranges.
Oranges are one of the best Citrus fruits that contain plenty of Vitamin C when they are compared to other citrus fruits.
Eating oranges or drinking orange juice helps to give your body the needed vitamin c and help boost your bodies immune system and prevent the flu and cold virus if you eat enough oranges or drink enough orange juice.
I drink a glass of orange juice every morning and notice that I don't get sick with the cold or flu virus as much and I have much more energy as well.
Just one large orange contains around 70 milligrams of Vitamin C.
So that's good but the more oranges you drink the more vitamin C you'll get which is good for your health.