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Diabetology & Metabolic Syndrome, Article number: 413 (2012)
The number of people with diabetes and pre-diabetes are exponentially increasing. Studies on humans have shown the beneficial effects of Zinc supplementation in patients with diabetes. The present study aims to systematically evaluate the literature and meta-analyze the effects of Zinc supplementation on diabetes. A systematic review of published studies reporting the effects of Zinc supplementations on diabetes mellitus was undertaken. The literature search was conducted in the following databases; PubMed, Web of Science and SciVerse Scopus. A meta-analysis of studies examining the effects of Zinc supplementation on clinical and biochemical parameters in patients with diabetes was performed. The total number of articles included in the present review is 25, which included 3 studies on type-1 diabetes and 22 studies on type-2 diabetes. There were 12 studies comparing the effects of Zinc supplementation on fasting blood glucose in patients with type-2 diabetes. The pooled mean difference in fasting blood glucose between Zinc supplemented and placebo groups was 18.13mg/dl (95%CI:33.85,2.41; p<0.05). 2-h post-prandial blood sugar also shows a similar distinct reduction in (34.87mg/dl [95%CI:75.44; 5.69]) the Zinc treated group. The reduction in HbA1c was 0.54% (95%CI:0.86;0.21) in the Zinc treated group. There were 8 studies comparing the effects of Zinc supplementation on lipid parameters in patients with type-2 diabetes. The pooled mean difference for total cholesterol between Zinc supplemented and placebo groups was 32.37mg/dl (95%CI:57.39,7.35; p<0.05). Low-density lipoprotein cholesterol also showed a similar distinct reduction in the Zinc treated group, the pooled mean difference from random effects analysis was 11.19mg/dl (95%CI:21.14,1.25; p<0.05). Studies have also shown a significant reduction in systolic and diastolic blood pressures after Zinc supplementation. This first comprehensive systematic review and meta-analysis on the effects of Zinc supplementation in patients with diabetes demonstrates that Zinc supplementation has beneficial effects on glycaemic control and promotes healthy lipid parameters. Further studies are required to identify the exact biological mechanisms responsible for these results.
아연 중독증
경구섭취 후 급성 아연중독이 오면 오심 및 구토가 발생하고 열이 남.
용접시 발생하는 아연증기는 중독을 일으킬 수 있음.
아연의 만성적인 과다복용은 면역기능을 저하시키고 구리 결핍을 유발하여 저색소성 빈혈야기함.
첫댓글 음식에 있는 아연의 흡수는 음식내 파이테이트(phytate), 섬유소, 옥살레이트(oxalate), 철, 구리에 의해 방해됨.
페니실라민, 소듐발프로에이트, 에탐부톨과 같은 약물에 의해 아연 흡수가 방해됨.
음주 또한 아연흡수를 방해함. 또한 비타민 B6작용을 감소시켜 아연결핍초래.
- 아연은 췌장에서 분비하는 피콜산(picolinic acid)에 의해 흡수되는데 피콜산은 트립토판에서 생산되며 이 과정에서 비타민 B6가 필요함.