
This juice includes grapefruit and kumquats, which are both beneficial in improving your overall health and well-being. Here are some of the benefits of grapefruit and kumquats.
Grapefruit juice is long known for its benefit as a weight loss aide. Research has shown that grapefruit juice contains flavanoids, which block fat absorption, reduce insulin production, burn fats and curb appetite.
Bioflavonoids in grapefruit juice stops the cancer cells in breast cancer from multiplying. A glass of grapefruit juice helps to relieve constipation. Grapefruit juice is low on the Glycemic Index and so may be consumed by diabetics. It is also very beneficial for the digestive system by improving the flow of digestive juices. Excellent in treating common cold and fever, strengthens the liver and boost the immune system.
Kumquats are members of the citrus family. They look like tiny oval shaped oranges. The only exception is the whole fruit is eaten, including the skin. It has a somewhat sweet skin and tart pulp.
Kumquats contain a high percentage of vitamin C, antioxidant beneficial for skin and wound healing. The orange fruit contains beta-carotene which is fights against and prevents cancer. Like grapefruit, kumquat fights infections and boosts the immune system.

Ingredients:
- 2 grapefruits
- 10 kumquats
Directions:
Wash and peel grapefruits, then cut into sizes that can fit into your juicer feed. Wash kumquats but do not peel. Place kumquat first into juicer then grapefruits and juice. Serve immediately or store in a tightly fitted container.
Note: Grapefruit juice should never be taken if you are on certain medications such as antihypertensives, cholesterol lowering drugs, antihistamines, psychiatric medications, impotence drugs, immuno-suppressants and antiarrythmics. If you are on any medications please consult your physician before consuming grapefruit juice. Grapefruit juice contains high levels of furanocoumarins. Furanocoumarin prevents the metabolism of these drugs and thus may lead to a toxic build up in the system.

Thanks. I am wondering if you know of any literature on the furanocoumarin content of kumquats (and descendants like red limes [kumquat X Rangpur lime], limequats [kumquat x key lime], and calamondins [kumquat X sour mandarin])? I did find a good reference for Citrus proper, but not for the Fortunella genus/subgenus (kumquats): sour (Seville etc) oranges, grapefruit, and especially pummelo are dangerous due to the same 3 furanocoumarins (bergapten, bergamottin, & one other with a more complicated name). Limes and key limes don’t contain those 3, but contain a hefty dose of limettin and some others, for a total furanocoumarin content higher than grapefruit or sour orange though not as bad as the worst pummelos. They are implicated in phototoxicity (“bartender’s itch”), but I am unsure of the drug interactions (due to Cytochrome p450 enzyme inhibition, which likely requires a specific chemical geometry). (Mandarins, most sweet oranges, and the Ichang papeda are safe.) If kumquats are safe, then calamondins are also safe (b/c mandarins are) and red limes are probably safe in moderation (Rangpur limes contain low but detectable levels), though I would avoid limequats unless and until I can clear limettin etc of medical problems. (My parents live in kumquat territory and I would like to give them trees, but not kill them!)
Day 5 of Juicing: Grapefruit
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hai
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