Even if you can't find it fresh, you can get the same benefits from canned guava. Another super-rich source is the tiny black currant. 100 grams of these potent berries will supply about 200 mg of them. That's the full recommended daily dose!

The quest for the ultimate source of vitamin C has led nutritionists to discover the delights of some very tropical findings. The most impressive levels can be found in jujube, camu camu and acerola. If you haven't seen those in your local supermarket don't worry, there are plenty of other ways to get your vitamins.

Most of us aren't surprised to find them in fruit, but what is surprising is how easy it is to find in vegetables. Unlikely sources like cabbage, broccoli and cauliflower are great for people trying to cut down on their carbohydrates without letting their nutrition suffer.

Even using fresh herbs like coriander, parsley and thyme can boost your intake of them. But if you really want a vegetable that will provide a substantial dose of this important vitamin, look no further than sweet green or red peppers. Just 100 grams of green pepper will top up your vitamin C intake by 190 mg

So if you've been comparing apples to oranges all of these years, it's time to look at what else is available. There are so many wonderful foods that boost your vitamin C levels, your toughest decision may be which one to have first.