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Healthy Food - Grapefruit

ritau
07月14日
The grapefruit (Citrus × paradisi) is a subtropical citrus tree known for its relatively large sour to semisweet, somewhat bitter fruit. Grapefruit is a citrus hybrid originating in Barbados as an accidental cross between the sweet orange (C. sinensis) and pomelo (or shaddock; C. maxima), both of which were introduced from Asia in the 17th century. When found, it was nicknamed the "forbidden fruit". Frequently, it is misidentified as the very similar parent species, pomelo.

The "grape" part of the name alludes to clusters of fruit on the tree that often appear similar to grape clusters. The interior flesh is segmented and varies in color from white to yellow to pink to red.

The genetic origin of the grapefruit is a hybrid mix. One ancestor of the grapefruit was the Jamaican sweet orange (Citrus sinensis), itself an ancient hybrid of Asian origin; the other was the Indonesian pomelo (C. maxima). One story of the fruit's origin is that a certain "Captain Shaddock" brought pomelo seeds to Jamaica and bred the first fruit, although it probably originated as a naturally occurring hybrid between the two plants some time after they had been introduced there.

The hybrid fruit, then called "the forbidden fruit", was first documented in 1750 by a Welshman, Rev. Griffith Hughes, who described specimens from Barbados in The Natural History of Barbados.Currently, the grapefruit is said to be one of the "Seven Wonders of Barbados".

The grapefruit was brought to Florida by Count Odet Philippe in 1823, in what is now known as Safety Harbor. Further crosses have produced the tangelo (1905), the Minneola tangelo (1931), and the oroblanco (1984).



The grapefruit was known as the shaddock or shattuck until the 19th century.Its current name alludes to clusters of the fruit on the tree, which often appear similar to those of grapes. Botanically, it was not distinguished from the pomelo until the 1830s, when it was given the name Citrus paradisi. Its true origins were not determined until the 1940s. This led to the official name being altered to Citrus × paradisi, the "×" identifying its hybrid origin.

An early pioneer in the American citrus industry was Kimball Atwood, a wealthy entrepreneur who founded the Atwood Grapefruit Company in the late 19th century. The Atwood Grove became the largest grapefruit grove in the world, with a yearly output of 80,000 boxes of fruit. There, pink grapefruit was first discovered in 1906.

The varieties of Texas and Florida grapefruit include: 'Oro Blanco', 'Ruby Red', 'Pink', 'Rio Star', 'Thompson', 'White Marsh', 'Flame', 'Star Ruby', 'Duncan', and 'Pummelo HB'.

Raw grapefruit is 90% water, 8% carbohydrates, 1% protein, and negligible fat. In a 100-g reference amount, raw grapefruit provides 33 Calories and is a rich source of vitamin C (40% of the Daily Value), with no other micronutrients in significant content.

Grapefruit juice contains about half the citric acid of lime or lemon juice, and about 50% more citric acid than orange juice.

Grapefruit has also been investigated in cancer medicine pharmacodynamics. Its inhibiting effect on the metabolism of some drugs may allow smaller doses to be used, which can help to reduce costs.

In aromatherapy, the fruity aroma of grapefruit is believed to have an uplifting and stimulating effect on the mind, inhaling the aroma of grapefruit can be used to help combat tiredness or mental exhaustion.

Lifestyle magazines and websites sometimes recommend grapefruit as a stain remover for porcelain and enamel.
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