Méndez Rosa Olivia, Wyatt C Jane, Saavedra Javier, Ornelas Alicia
Centro de Investigación en Alimentación y Desarrollo, Hermosillo, Sonora, México.
Arch Latinoam Nutr. 2002 Dec;52(4):344-7.
Ascorbic acid is one of the important antioxidant nutrients that can aid in the prevention of oxidative cellular damage. Adequate dietary intake is essential as humans can not synthesize this vitamin. It has been reported that smokers require higher dietary intakes to maintain their serum levels. The objective of this study was to determine serum levels of ascorbic acid in young male smokers and non smokers in the city of Hermosillo, Sonora, Mexico. In addition, their dietary intake of ascorbic acid was determined by a 24 h dietary recall. The dietary intake of ascorbic acid in 12 smokers was 64 +/- 11 mg/d and in 13 non smokers it was 70 +/- 12 mg/d. The smokers in this study did not meet the dietary recommendation of 100 mg/d. Serum ascorbic acid values in smokers and non smokers were 24.2 +/- 6.9 mumol/L and 30.9 +/- 3.7 mumol/L respectively. No significant difference was found among the 2 groups. Although the average serum ascorbic acid values fell within the range considered normal, 50% of the smokers had individual values that were below 23 mumol/L, indicating that these subjects have hipovitaminosis. A positive correlation between intake and serum levels was obtained for smokers (r = 0.71; p = 0.03). The results of this study suggest smokers may be at increased risk for chronic diseases due to their low intake and low serum levels of ascorbic acid.
抗坏血酸是重要的抗氧化营养素之一，有助于预防细胞氧化损伤。由于人体无法合成这种维生素，所以充足的膳食摄入至关重要。据报道，吸烟者需要更高的膳食摄入量来维持其血清水平。本研究的目的是测定墨西哥索诺拉州埃莫西约市年轻男性吸烟者和非吸烟者的血清抗坏血酸水平。此外，通过24小时膳食回顾来确定他们抗坏血酸的膳食摄入量。12名吸烟者抗坏血酸的膳食摄入量为64±11毫克/天，13名非吸烟者为70±12毫克/天。本研究中的吸烟者未达到每日100毫克的膳食推荐量。吸烟者和非吸烟者的血清抗坏血酸值分别为24.2±6.9微摩尔/升和30.9±3.7微摩尔/升。两组之间未发现显著差异。尽管平均血清抗坏血酸值在正常范围内，但50%的吸烟者个体值低于23微摩尔/升，表明这些受试者存在维生素缺乏症。吸烟者的摄入量与血清水平之间呈正相关（r = 0.71；p = 0.03）。本研究结果表明，吸烟者由于抗坏血酸摄入量低和血清水平低，可能患慢性病的风险增加。
