Grapefruit is rich in vitamin C, contains the fiber pectin, and the beneficial antioxidant lycopene pink and red hues. Grapefruit also helps lower cholesterol, its seeds have antioxidant properties, even the "grapefruit diet" theory thinks that the fruit's low glycemic index is able to help the body's metabolism burn fat. Those lets grapefruit become a very good source of many nutrients and phytochemicals that contribute to a healthy diet.
Be kindly informed the Drug interactions：
Grapefruit can have a number of interactions with drugs, often increasing the effective potency of compounds.
Grapefruit comes in many varieties. The most popular varieties cultivated today are red, white, and pink hues, referring to the internal pulp color of the fruit. And the flavors range could from highly acidic and somewhat sour to sweet. What we have is:
STAR RUBY: red rind and red flesh
PINK BEAUTY (Ruby): red rind and red flesh (pink color)
RUBY: yellow rind and red flesh
SWEET GREEN JEWEL: green rind and white(light yellow) flesh, when the rind color became to yellow, it means ripe and more sweeter and juicy.
The Star Ruby is the darkest of the red varieties, very attractive red blushed fruit. The flesh and juice are strongly pigmented, up to three times more colourful than 'Ruby Red', and have a bit more sugar and acid. The fruit is low-seeded or seedless and has a very good flavour.
Our Sweet Green Jewel, it is a cross of grapefruit and pomelo by Taiwan farmers. The shape and juiciness of the fruit resembles grapefruit, but it tastes as sweet as a pomelo. The skin is dark green in the beginning of the season, and it gradually changes to bright yellow. The fruit is unique by being sweet, yet low on calories which because of that the sweetness does not come from an excess of sugar, but from lack of acid, therefore it might be safe to eat without gaining weight.
STAR RUBY: Around August ~ February
PINK BEAUTY (Ruby): Around August ~ February
RUBY: Around August ~ March
SWEET GREEN JEWEL: Around August ~ November