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The skinny on tuna fat: health implications.

机译：金枪鱼脂肪的瘦身：对健康的影响。

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Objective. Dietary n-3 (omega-3) and n-6 (omega-6) PUFA have significant implications in health and disease prevention. Marine life is rich in long-chain n-3 PUFA. Children and adults in North America are reluctant fish eaters; canned tuna is a common fish in children's diets. Although a multitude of tuna products are available, their respective PUFA contents have not been well described. The aim of the present study was to compare the fatty acid (FA) profiles of different commercially available US tuna products. Design. Fat and FA composition of eight products randomly selected from two US suppliers were analysed with capillary GC after lipid extraction. Setting. Large north-eastern US grocery store chain. Subjects. Canned tuna. Results. Energy from fat varied from 3 to 33 % and the essential FA (EFA) linoleic acid (18 : 2n-6) and alpha-linolenic acid (18 : 3n-3) varied tenfold. DHA varied between 90 and 770 mg/serving. The n-6:n-3 ratio was 3:1-4:1 in oil-packaged products, 2:1-7:1 in packaged tuna salads and 1:3-1:7 in water-packaged products. A similar magnitude of differences was seen in the ratio between arachidonic acid (20 : 4n-6) and DHA. Conclusions. Light tuna canned in water may be a better choice of providing n-3 PUFA to individuals in a healthy population, whereas oil-packaged products may be preferable for those individuals with a need for increased EFA, such as for patients with cystic fibrosis. Awareness regarding PUFA content may aid in consumer product choices and health-care provider advice
机译：目的。饮食中的 n -3（omega-3）和 n -6（omega-6）PUFA对健康和疾病预防具有重要意义。海洋生物富含长链 n -3 PUFA。北美的儿童和成人不愿吃鱼。金枪鱼罐头是儿童饮食中的常见鱼。尽管有许多金枪鱼产品可供使用，但它们各自的PUFA含量尚未得到很好的描述。本研究的目的是比较不同市售美国金枪鱼产品的脂肪酸（FA）特性。设计。脂质提取后，通过毛细管气相色谱分析了从两家美国供应商中随机选择的八种产品的脂肪和FA组成。设置。美国东北部大型杂货店连锁店。主题。金枪鱼罐头。结果。脂肪中的能量从3％到33％不等，必需的FA（EFA）亚油酸（18：2 -6）和α-亚麻酸（18：3 n -3）变化十倍。 DHA在90到770 mg /份之间变化。油包装产品中 n -6： n -3的比例为3：1-4：1，金枪鱼色拉中的比例为2：1-7：1，1 ：3-1：7在水包装产品中。在花生四烯酸（20∶4 n -6）与DHA之间的比例上观察到相似的差异。结论。淡水金枪鱼罐头可能是向健康人群提供 n -3 PUFA的更好选择，而油包装产品对于那些需要增加EFA的人群可能更可取，例如用于囊性纤维化患者。有关PUFA含量的意识可能有助于消费者选择产品和保健提供者的建议

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