You can't compare oranges to oranges
Part of the problem when trying to eat fruits and vegetables for their perceived vitamin content is that not all hybrids or varieties contain the same amount of vitamins.
Let us take for example vitamin C content.For the same amount of orange, gram per gram, California Valencias contain 81% of the DV for vitamin C, while Florida Oranges contain 75% of the DV and Navel Oranges contain 99%. Click to see complete nutrition facts.
The difference found in Guavas is even greater, with Common Guavas providing 381% of the DV for vitamin C and Strawberry Guavas providing only 62%.
Click to see complete nutrition facts.
What is the lesson from all this? Ironically it is not to get too caught up in the numbers, and to just eat more fruits and vegetables. While the amount of certain vitamins might differ between varieties of fruits and vegetables, these food items are still our best source for most natural vitamins, and should be eaten in greater quantities than we eat them now...