Beverage
Grapefruit juice, 100%, with calcium added
How grapefruit juice, 100%, with calcium added scores for gout, what moved that score, and the nutrition and portions behind it.
Food Index score
Grapefruit juice, 100%, with calcium addedModerate
| Starting score | 100 |
| Category: 100% Juice | -25 |
| Fructose | -8.7 |
| Nutrient Gaps | -4 |
| Vitamin C | +2.2 |
| Purine Load | -0.5 |
| Saturated Fat | -0.3 |
| 3 smaller factors | +0.5 |
| Final score | 64 |
Grapefruit juice, 100%, with calcium added scores 64 out of 100 and sits in the moderate band. Middle of the range. Portion size and how often you eat it matter more here.
Penalties took 38.5 points off a starting score of 100, and protective factors added 2.7 back. Every factor is listed in full below.
Scores run 0–100, where higher means more gout-friendly on average. They reflect relative ranking across foods, not a personal risk level. The same food can suit one person and not another, so use the score as a starting point for a conversation with your clinician.
The underlying data
Nutrition and portions
Nutrition Facts
- Total Fat0.68 g
- Saturated Fat0.17 g
- Sodium2 mg
- Dietary Fiber0.30 g
- Total Sugars8.0 g
- Protein0.51 g
- Calcium146 mg
- Iron0.06 mg
- Magnesium9 mg
- Vitamin C22.2 mg
- Folate12 ug
- Water90.8 g
- Alcohol0 g
- Omega-3 EPA0 g
- Omega-3 DHA0 g
Common portions
- 1 fl oz (no ice)typical31 g
- 1 fl oz (with ice)23 g
- 1 fl oz (NFS)31 g
- Quantity not specified248 g
Where the purine figure comes from
No direct purine measurement has been published for this food, so the score uses the measured median for its category (fruit juice).
We rate this a good confidence estimate.
How purines affect the score →Nutrition values from the USDA FoodData Central database.
Scoring rationale
Every factor, in full
Each row shows the points a factor moved, what drove it, and the studies behind its weight.
- -25Long-term
Category: 100% JuiceLong-term
Concentrated fructose; OJ RR 2.42 (Choi 2010). Lacks fiber matrix of whole fruit.
Evidence: Choi HK 2004, N Engl J Med · Choi HK 2008, BMJ · Zhang Y 2006, Am J Med
- -8.7Long-term
FructoseLong-term
An estimated 4.0 g of fructose per 100 g, with no portion adjustment.
Evidence: Choi HK 2008, BMJ · Choi HK 2010, JAMA
- -4Long-term
Nutrient GapsLong-term
Provides meaningful amounts of only 3 of the 5 protective nutrient groups (vitamin C, fiber, omega-3, magnesium and folate).
Evidence: Choi HK 2009, Arch Intern Med · Juraschek SP 2016, Arthritis Rheumatol · Zhang M 2019, Arthritis Rheumatol
- +2.2Long-term
Vitamin CLong-term
22.2 mg of vitamin C per 100 g, with no portion adjustment. Vitamin C helps the kidneys excrete urate.
Evidence: Choi HK 2009, Arch Intern Med · Juraschek SP 2011, Arthritis Care Res
- -0.5Flare risk
Purine LoadFlare risk
8 mg of purines per 100 g, weighted 0.5x as a beverage source and 1.0x for the typical portion: 4 mg effective.
Evidence: Choi HK 2004, N Engl J Med · Kaneko K 2014, Biol Pharm Bull · Zhang Y 2012, Ann Rheum Dis
- -0.3Long-term
Saturated FatLong-term
0.17 g of saturated fat per 100 g, with no portion adjustment.
Evidence: Juraschek SP 2016, Arthritis Rheumatol · Yokose C 2021, Curr Opin Rheumatol
- +0.2Long-term
FiberLong-term
0.3 g of dietary fiber per 100 g, with no portion adjustment.
Evidence: Juraschek SP 2016, Arthritis Rheumatol
- +0.2Long-term
MagnesiumLong-term
9 mg of magnesium per 100 g, with no portion adjustment.
Evidence: Li X 2015, BMJ
- +0.1Long-term
FolateLong-term
12 µg of folate per 100 g, with no portion adjustment.
Evidence: Lyu LC 2017, Am J Clin Nutr
Keep looking
Similar foods in fruit juice
Common questions
About grapefruit juice, 100%, with calcium added
Look up any food's Food Index score
Each score lists the factors that moved it, the portion it assumes, and the studies behind each factor's weight.