According to Linus Pauling Institute, 5 servings or 2 1/2 cups of fruits and vegetables should average 200 mg of Vitamin C. Here is a rough guide on the Vitamin C content in some of the fruits we consume.
| Food | Serving | Vitamin C (mg) |
| Orange juice | ¾ cup (6 ounces) | 62-93 |
| Grapefruit juice | ¾ cup (6 ounces) | 62-70 |
| Orange | 1 medium | 70 |
| Grapefruit | ½ medium | 38 |
| Strawberries | 1 cup, whole | 85 |
| Tomato | 1 medium | 16 |
| Sweet red pepper | ½ cup, raw chopped | 95 |
| Broccoli | ½ cup, cooked | 51 |
| Potato | 1 medium, baked | 17 |