Document Detail


Quantitative assessment of citric acid in lemon juice, lime juice, and commercially-available fruit juice products.
MedLine Citation:
PMID:  18290732     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND AND PURPOSE: Knowledge of the citric acid content of beverages may be useful in nutrition therapy for calcium urolithiasis, especially among patients with hypocitraturia. Citrate is a naturally-occurring inhibitor of urinary crystallization; achieving therapeutic urinary citrate concentration is one clinical target in the medical management of calcium urolithiasis. When provided as fluids, beverages containing citric acid add to the total volume of urine, reducing its saturation of calcium and other crystals, and may enhance urinary citrate excretion. Information on the citric acid content of fruit juices and commercially-available formulations is not widely known. We evaluated the citric acid concentration of various fruit juices.
MATERIALS AND METHODS: The citric acid content of 21 commercially-available juices and juice concentrates and the juice of three types of fruits was analyzed using ion chromatography.
RESULTS: Lemon juice and lime juice are rich sources of citric acid, containing 1.44 and 1.38 g/oz, respectively. Lemon and lime juice concentrates contain 1.10 and 1.06 g/oz, respectively. The citric acid content of commercially available lemonade and other juice products varies widely, ranging from 0.03 to 0.22 g/oz.
CONCLUSIONS: Lemon and lime juice, both from the fresh fruit and from juice concentrates, provide more citric acid per liter than ready-to-consume grapefruit juice, ready-to-consume orange juice, and orange juice squeezed from the fruit. Ready-to-consume lemonade formulations and those requiring mixing with water contain < or =6 times the citric acid, on an ounce-for-ounce basis, of lemon and lime juice.
Authors:
Kristina L Penniston; Stephen Y Nakada; Ross P Holmes; Dean G Assimos
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of endourology / Endourological Society     Volume:  22     ISSN:  0892-7790     ISO Abbreviation:  J. Endourol.     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-03-21     Completed Date:  2008-09-18     Revised Date:  2014-09-14    
Medline Journal Info:
Nlm Unique ID:  8807503     Medline TA:  J Endourol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  567-70     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Beverages / analysis*
Citric Acid / analysis*
Citrus / chemistry*
Humans
Urolithiasis / prevention & control
Grant Support
ID/Acronym/Agency:
R01 DK062284/DK/NIDDK NIH HHS; R01 DK062284-06/DK/NIDDK NIH HHS
Chemical
Reg. No./Substance:
2968PHW8QP/Citric Acid
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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