Vats Praveen, Singh Som N, Singh Vijay K, Shyam Radhey, Upadhyay Tribhuvan N, Singh Shashi B, Banerjee Pratul K
Defence Institute of Physiology and Allied Sciences, Timarpur, Delhi, India.
Wilderness Environ Med. 2007 Winter;18(4):258-63. doi: 10.1580/06-WEME-OR-004R3.1.
Antarctic expeditioners face extremes of environmental conditions along with isolation which affect normal human activity at a polar station. Diets of polar expeditioners consist of products that have been kept in storage for more than a year. Processing and preservation adversely affect the nutritive value of the food products, especially water-soluble vitamins. This study was conducted to determine water-soluble vitamin status of Antarctic expeditioners consuming processed canned food.
Twenty-two healthy male volunteers age 26 to 56 years (39.5+/-8.5, mean+/-SD) participated in the study. The study was conducted in 3 phases: at Goa, India (phase I), 48 hours after arriving in Antarctica (phase II) and after 1 month in Antarctica (phase III). Water-soluble vitamin status in erythrocytes was assessed at each phase with evaluation of riboflavin, thiamine, and pyridoxine status. Urinary N-methyl nicotinamide and methylmalonic acid (MMA) levels were measured to assess niacin and vitamin B(12) status. Blood plasma assays were used to assess ascorbic acid status.
No significant changes in riboflavin, thiamine, and pyridoxine status in erythrocytes and urinary excretion levels were observed after 1 month in Antarctica. Vitamin C levels decreased significantly (P<.001) after 1 month in Antarctica compared with basal values (1.31+/-0.076 mg/dL during phase I to 0.81+/-0.063 mg/dL during phase III). However, these levels were still within the normal reference range.
This study found no water-soluble vitamin deficiencies in participants consuming processed and canned food after 1 month in Antarctica.
南极考察队员面临极端的环境条件以及与世隔绝的状态，这会影响极地考察站的正常人类活动。极地考察队员的饮食由储存超过一年的食品组成。加工和保存会对食品的营养价值产生不利影响，尤其是水溶性维生素。本研究旨在确定食用加工罐头食品的南极考察队员的水溶性维生素状况。
22名年龄在26至56岁之间（平均39.5±8.5岁，均值±标准差）的健康男性志愿者参与了该研究。研究分三个阶段进行：在印度果阿（第一阶段）、抵达南极48小时后（第二阶段）以及在南极1个月后（第三阶段）。在每个阶段评估红细胞中的水溶性维生素状况，同时评估核黄素、硫胺素和吡哆醇的状况。测量尿中N-甲基烟酰胺和甲基丙二酸（MMA）水平以评估烟酸和维生素B12状况。采用血浆检测评估维生素C状况。
在南极1个月后，红细胞中的核黄素、硫胺素和吡哆醇状况以及尿排泄水平均未观察到显著变化。与基础值相比，在南极1个月后维生素C水平显著下降（P<0.001）（第一阶段为1.31±0.076mg/dL，第三阶段为0.81±0.063mg/dL）。然而，这些水平仍在正常参考范围内。
本研究发现，在南极1个月后，食用加工罐头食品的参与者不存在水溶性维生素缺乏情况。
