As a nutritionist, I can tell you that while oranges are a great source of vitamin C and various other nutrients, it's possible to have too much of a good thing. Consuming a large quantity of oranges in one day can lead to several issues: 1. Carotenoid Overload: Oranges are rich in carotenoids, which are beneficial but can cause a condition called carotenemia if you consume too much. This is when your skin turns a yellow-orange color due to the accumulation of carotenoids in the body. 2. Stomach Upset: Oranges are acidic, and overconsumption can lead to stomach discomfort, heartburn, or acid reflux, especially for those who are sensitive to acidic foods. 3. Sugar Intake: Although oranges are natural, they do contain sugar. Eating too many can contribute to a high sugar intake, which is not ideal for maintaining stable blood sugar levels or for those with diabetes. 4. Oxalate Content: Oranges contain oxalates, which can contribute to the formation of kidney stones in susceptible individuals. 5. Fiber Intake: While fiber is generally beneficial, too much can cause gastrointestinal issues like bloating, gas, and diarrhea. The key is moderation. It's recommended to follow the general guidelines for fruit intake, which is about 2 to 3 servings of fruit per day, and to include a variety of fruits in your diet. read more >>

Health risks. Oranges are great for you, but you should enjoy them in moderation, Flores warned. ... Though oranges are relatively low in calories, eating several of the fruits in a day can add up and may lead to weight gain. It is also possible to have too much vitamin C (more than 2,000 mg a day).read more >>