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Eur J Clin Nutr. 2014 Aug;68(8):938-40. doi: 10.1038/ejcn.2014.63. Epub 2014 Apr 16.

Comparison of breast milk vitamin A concentration measured in fresh milk by a rapid field assay (the iCheck FLUORO) with standard measurement of stored milk by HPLC.

Author information

1
Program in International and Community Nutrition, Department of Nutrition, University of California, Davis, Davis, CA, USA.
2
USDA Western Human Nutrition Research Center, Davis, CA, USA.
3
Helen Keller International, Yaoundé, Cameroon.

Abstract

Availability of rapid, point-of-contact analytical methods would facilitate the use of breast milk vitamin A concentration (BMVA) to assess vitamin A (VA) status. We compared BMVA concentrations measured by high-performance liquid chromatography (HPLC) (the standard technique) with those by iCheck FLUORO, a new portable fluorometer that can rapidly quantify BMVA. Casual breast milk samples (n=154) were collected during a representative survey in Yaoundé and Douala, Cameroon. Milk fat and BMVA concentrations (by iCheck) were measured in fresh milk in the field. After storage at <-20 °C, BMVA concentrations were also measured by HPLC. BMVA values from the two methods were highly correlated (R(2)=0.72 for BMVA/l; R(2)=0.62 for BMVA/g fat, both P<0.0001). HPLC values were greater than iCheck values on average, and the difference increased with increasing BMVA. The iCheck FLUORO could be useful for monitoring fortification programs, but before-after surveys to assess change in BMVA concentrations should use one method consistently.

PMID:
24736678
DOI:
10.1038/ejcn.2014.63
[Indexed for MEDLINE]

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