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Grapefruit juice - what kind of sugar?

Answered on August 19, 2014
Created February 21, 2010 at 4:55 PM

What kind of sugar is in grapefruit juice?

NutritionData does not seem to have a breakdown: LINK

I remember getting a copy of this crazy heart diet almost ten years ago that claimed that you should eat bacon, butter and high fat foods in order to lower your cholesterol, which like anything in retrospect had some good and bad advice in it based on the latest information that we now have about saturated fats, sugars, insulin, etc.

I am not craving juice or sugars, but I have started to become really curious about the kinds of sugar in foods. I know on PaNu they seem to vilify fructose and fruit in general and for whatever reason I remembered this fad diet from ten years ago which emphasized saturated fats, but insisted on eating grapefruit juice as a fat burner.

NutrionData says that there are 23grams of carbohydrates, but has no sugar information.

I did some searching, but cannot seem to find a sugar breakdown on grapefruit. Does anyone have more information on grapefruit juice? I'm assuming the claim that it catalyzes fat burning is bunk, but am still curious about carbohydrate content.

E258d3ab9815cad55f90ae462b85c1cf

(362)

on February 24, 2010
at 12:33 PM

Thanks! I am going to mark this one as answered. I also appreciate you explaining the breakdown of sucrose into fructose. I did not know that until you pointed it out.

E258d3ab9815cad55f90ae462b85c1cf

(362)

on February 24, 2010
at 12:33 PM

Thanks for the reply!

A89f9751a97c3082802dc0bcbe4e9208

(13978)

on February 23, 2010
at 02:33 AM

Great resource! Thanks!

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2 Answers

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6426d61a13689f8f651164b10f121d64

(11478)

on February 21, 2010
at 09:26 PM

In general, citrus fruits are relatively low in fructose compared to, say, watermelon. David is correct about the ratios, but to flesh out the numbers for pink or white grapefruit, total sugar is 6.2%, or 6.2gm per 100gm fruit. Total fructose content is 2.9%, or 2.9gm per 100gm. Remember, sucrose is 1/2 glucose and 1/2 fructose, which makes the total glucose/fructose ratio about 1:1. Juice would be slightly different from whole fruit. Again, numbers are from Cordain, secondarily sourced here (scroll to bottom chart): http://www.reducetriglycerides.com/reader_triglycerides_low_fructose_fruit.htm

A89f9751a97c3082802dc0bcbe4e9208

(13978)

on February 23, 2010
at 02:33 AM

Great resource! Thanks!

E258d3ab9815cad55f90ae462b85c1cf

(362)

on February 24, 2010
at 12:33 PM

Thanks! I am going to mark this one as answered. I also appreciate you explaining the breakdown of sucrose into fructose. I did not know that until you pointed it out.

1
65125edd5aafad39b3d5b3a8b4a36bb7

on February 21, 2010
at 09:02 PM

Well, you can go use a chart linked to from Dr. Cordain's site which gives a breakdown on the sugar types in the actual fruit itself. The raw fruit will most likely be different from condensed juice, but if you make your juice drinks from fresh fruit it might be close.

Chart: http://www.thepaleodiet.com/nutritional_tools/fruits_table.html

Summary: 1 :: 1 :: 3 ratio of glucose, fructose, and sucrose, respectively.

E258d3ab9815cad55f90ae462b85c1cf

(362)

on February 24, 2010
at 12:33 PM

Thanks for the reply!

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