I just bought my first juicer today and I'm having a blast experimenting with the different favors.

I'm looking at all these juice recipes and they all say to peel the rind off of the citrus fruits when juicing as they leave a very sour flavor. I don't mind extra sour things, so my question is, what nutrients am I gaining if I keep the rind on when juicing the whole fruit (eg oranges, lemons, limes, etc)?

Is it still better to leave the rind off when juicing?

  • 2
    Sour? This is strange, peel is not especially sour, but if you juice whole citrus fruits, you also include the pith, which is very bitter. – rumtscho Apr 9 '12 at 21:21
  • I juiced an orange and it was indeed sour, but delicious in my opinion. – OghmaOsiris Apr 9 '12 at 21:22

You can look up nutritional information at the USDA nutrient database. Their entry for orange peel says that 100g of orange peel contains: 97 Calories, various minerals, and a few vitamins. You can compare it raw oranges to see how it differs from the rest of the fruit. You can also look up orange juice, etc.

You can also get some of that information (plus comparison to USDA recommended daily amounts and to other foods) at Wolfram Alpha. You can even have it compare orange peel and orange.

As rumtscho mentions, the pith (white part of the peel) is bitter. The zest (outermost colored part) is very fragrant (and flavorful).

Oranges vary in sourness depending on variety, cultivar, growing conditions, etc.

  • Peel is a rich source of dietary fiber (non soluble polysaccharides) and will help reduce the risk of colon cancer and reduce constipation amongst other things
  • it is low in calories, sugar and fat and free from cholesterol
  • the peel of an orange contains more vitamin C that its juice does (without peel, of course)
  • and, if you asthmatic, the peel of a passion fruit can help reduce coughing and wheezing
  • 3
    [citation needed], especially for health claims. – derobert Apr 10 '12 at 12:09
  • I edited it from here – Danger Fourpence Apr 10 '12 at 12:28
  • 1
    We generally expect reliable sources when making claims beyond the nutrient content itself (such as causing/preventing cancer or treating the symptoms of some chronic disease). Regardless, it's off-topic, the question was about the nutrient content and not what potential benefits they might have. – Aaronut Apr 11 '12 at 0:14

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