"Citrus" refers to a large genus of flowering plants that are cultivated globally for their fruit. Oranges, lemons, grapefruits, limes and tangerines have all been featured in diets and medicinal practices of various cultures since far back in history. Citrus fruits are often juiced, either mechanically or by hand; the result is a fibrous and nutritious byproduct called pulp that has numerous health benefits.
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Citrus pulp is rich in vitamin C, which is a potent antioxidant that may help support numerous bodily systems. A study published in the journal "Epidemiology" found that vitamin C had an inverse effect on mortality for cancers and cardiovascular diseases. Citrus pulp also contains beta-carotene, which is converted by the body into vitamin A, as well as small amounts of vitamins B-1, B-2, B-3, B-5, B-6 and E.
Citrus pulp contains high levels of calcium, magnesium, phosphorus and potassium, which may improve brain function, heart health and bone strength. Potassium also contributes to kidney function. Citrus fruit additionally provides small amounts of copper, iron, manganese and zinc. Lemons uniquely offer sodium, chlorine and sulphur.
The antioxidant action of vitamins C, A and E has been the center of much cancer research, and these vitamins have all shown potential for treating and preventing certain forms of cancer caused by free radical damage. Citrus pulp also contains flavonoids, limonoids and coumarins, chemicals produced by plants to protect themselves from viral, bacterial and fungal invasions.
The thick, fibrous attribute of pulp is derived from high concentrations of a dietary fiber called pectin. Pectin helps lower cholesterol, ease digestion and improve the removal of fat and harmful chemicals from the body.