The benefits of fennel can be easily included in the diet. But do you know that 1 teaspoon of fennel (6 grams) contains 2 grams of dietary fiber, which contains 20 calories, which gives you 2% to 3% of the whole day’s vitamin C and potassium. Apart from this, gives calcium, iron and magnesium from 6% to 7%. Also gives 19% manganese. Drinking fennel tea and fennel water keeps most of the diseases of the body away.