添加柠檬酸盐或苹果酸盐对强化钙橙汁中钙吸收的影响。

Effect of added citrate or malate on calcium absorption from calcium-fortified orange juice.

作者信息

Pak C Y, Stewart A, Haynes S D

机构信息

Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas 75235.

出版信息

J Am Coll Nutr. 1994 Dec;13(6):575-7. doi: 10.1080/07315724.1994.10718450.

DOI:10.1080/07315724.1994.10718450

PMID:7706589

Abstract

OBJECTIVE

Calcium absorption was determined from calcium-fortified diluted orange juice, which contained additional citrate or malate, in 16 normal subjects.

METHODS

Each load of fortified orange juice with additional citrate (OJ+C) contained 300 mg Ca, 5.7 mEq malate, and 33.6 mEq citrate (10.4 mEq of which were added). Each load of orange juice with additional malate (OJ+M) had 300 mg Ca, 23.2 mEq citrate and 16.1 mEq malate (10.4 mEq of which were added). For each subject, fractional (intestinal) calcium absorption was measured by taking the ratio of fractional forearm radioactivity following an oral administration of OJ+C or OJ+M (labeled with 47Ca) and the fractional forearm radioactivity obtained after intravenous administration of trace 47Ca chloride on a separate occasion.

RESULTS

There was no significant difference in fractional calcium absorption from the two calcium-fortified orange juice preparations (40.1 +/- 8.3% for OJ+C and 40.6 +/- 8.6% for OJ+M, p = 0.81).

CONCLUSION

Calcium-fortified orange juice with additional citrate provides equivalent bioavailable calcium as the juice with additional malate.

摘要

目的

测定16名正常受试者从添加了柠檬酸盐或苹果酸盐的钙强化稀释橙汁中钙的吸收情况。

方法

每剂添加柠檬酸盐的强化橙汁（OJ+C）含有300毫克钙、5.7毫当量苹果酸盐和33.6毫当量柠檬酸盐（其中添加了10.4毫当量）。每剂添加苹果酸盐的橙汁（OJ+M）含有300毫克钙、23.2毫当量柠檬酸盐和16.1毫当量苹果酸盐（其中添加了10.4毫当量）。对于每名受试者，通过口服OJ+C或OJ+M（用47Ca标记）后前臂放射性分数与另一次静脉注射微量氯化钙后获得的前臂放射性分数之比来测量（肠道）钙吸收分数。