THE EFFECTS OF ZINC SUPPLEMENTATION TO CHINESE RURAL PREGNANT WOMEN AND THEIR PREGNANCY OUTCOME

Objective: TO assess the effects of zinc supplementation to Chinese rural pregnant with cereal-based diet and their pregnancy outcome. Methods A total of 156 women were given randomly in double blind 5mg/d (group A, GPA, n=37),10mg/d (group B, GPB, n=40), 30mg (group C, GpC, n = 39) Of zinc supplement or placebo (group D, GpD, n = 40 ) starting from, the first visit at the prenatal clinic (average 9-week gestation ) till the delivery. Results Mean dietary zinc intake of these women was about 10mg/d, and more than 65% of dietary zinc were taken from cereals, grains and vegetables. Serum zinc concentrations at 25-and 32-gestation in GpC and in the umbilical cord blood of their babies at birth significantly increased. Infants in GpC had a significantly heavier birth weight (283. 079, P = 0. 016 ) and larger head circumference(0. 63cm, P = 0. 035) than infants in GpD. The incidence of low birth weight, preterm and intrauterine growth retardation infants was significantly reduced in GpC. As compared to GpD (38. 34 ± 1. 34 weeks), the duration of gestation in GpD(39. 12± 1. 11 weeks) was prolonged (P= 0. 032). Serum zinc concentration at 25-weeks gestation was negatively correlated with duration of gestation (P = 0. 009 ). Apgar score of the infants in GpC was significantly higher than that in GpD, and serum zinc concentration at 32-weeks gestation was positively associated with infant Apgar score (P = 0. 015 ). Conclusion Zinc supplementation in 30mg/d to Chinese rural women during pregnancy could significantly improve their pregnancy outcome. Both 5mg/d and 10mg/d of zinc supplementation had no detected benefits to them.

The effect of zinc supplementation on diarrheal diseases in children in the Niger Delta Sub-Region of Nigeria

This study evaluated the trend of diarrheal diseases managed with zinc supplementation by comparing it with diarrheal diseases managed without zinc supplementation at the University of Port Harcourt Teaching hospital (UPTH), Nigeria. The study was a descriptive retrospective study done at the Diarrhea Training Unit (DTU) of UPTH to determine the effect of zinc supplementation in the management of diarrhea in children under 5 years. Out of the 134 case records studied, of children aged 0 to 59 months who presented with diarrhea at the DTU, 57 children did not receive zinc supplementation between October and December, 2007 and 77 children received zinc supplementation between October and December 2009. The results showed that (74) 96.1% of patients who received zinc supplementation, and (48) 84.2% of those who did not, had no repeat diarrheal episodes when seen at the follow up clinic. On the other hand, 1.3% of those who received zinc supplementation and 1.8% of those who did not, had increased episodes of diarrhea when seen at the follow up clinic. Of those who received, and those who did not receive zinc supplementation, 2.6% and 14% respectively, had reduced episodes of diarrhea. These findings clearly demonstrate the effectiveness of zinc supplementation in halting the course of diarrheal diseases in children aged 0 to 59 months. We therefore advocate for the use of zinc supplementation in the management of diarrhea in

The effectiveness of zinc supplementation in men with isolated hypogonadotropic hypogonadism

A multicenter, open-label, randomized, controlled superiority trial with 18 months of follow-up was conducted to investigate whether oral zinc supplementation could further promote spermatogenesis in males with isolated hypogonadotropic hypogonadism （IHH） receiving sequential purified urinary follicular-stimulating hormone/human chorionic gonadotropin （uFSH/hCG） replacement. Sixty-seven Chinese male IHH patients were recruited from the Departments of Endocrinology in eight tertiary hospitals and randomly allocated into the sequential uFSH/hCG group （Group A, n = 34） or the sequential uFSH plus zinc supplementation group （Group B, n = 33）. In Group A, patients received sequential uFSH （75 U, three times a week every other 3 months） and hCG （2000 U, twice a week） treatments. In Group B, patients received oral zinc supplementation （40 mg day-1） in addition to the sequential uFSH/hCG treatment given to patients in Group A. The primary outcome was the proportion of patients with a sperm concentration 〉1.0 × 106 ml-1 during the 18 months. The comparison of efficacy between Groups A and B was analyzed. Nineteen of 34 （55.9%） patients receiving sequential uFSH/hCG and 20 of 33 （60.6%） patients receiving sequential uFSH/hCG plus zinc supplementation achieved sperm concentrations ≥1.0 × 106 ml-1 by intention to treat analyses. No differences between Group A and Group B were observed as far as the efficacy of inducing spermatogenesis （P = 0.69）. We concluded that the sequential uFSH/hCG plus zinc supplementation regimen had a similar efficacy to the sequential uFSH/hCG treatment alone. The additional improvement of 40 mg day-1 oral zinc supplementation on spermatogenesis and masculinization in male IHH patients is very subtle.

Microbial synthesis of zinc oxide nanoparticles and their potential application as an antimicrobial agent and a feed supplement in animal industry: a review

In recent years, zinc oxide nanoparticles(ZnO NPs) have gained tremendous attention attributed to their unique properties. Notably, evidence has shown that zinc is an important nutrient in living organisms. As such, both prokaryotes and eukaryotes including bacteria, fungi and yeast are exploited for the synthesis of ZnO NPs by using microbial cells or enzyme, protein and other biomolecules compounds in either an intracellular or extracellular route. ZnO NPs exhibit antimicrobial properties, however, the properties of nanoparticles(NPs) are depended upon on their size and shape, which make them specific for various applications. Nevertheless, the desired size and shape of NPs can be obtained through the optimization process of microbes mediated synthesis by manipulating their reaction conditions. It should be noted that ZnO NPs are synthesized by various chemical and physical methods.Nonetheless, these methods are expensive and not environmentally friendly. On that account, the microbes mediated synthesis of ZnO NPs have rapidly evolved recently where the microbes are cleaner, eco-friendly, nontoxic and biocompatible as the alternatives to chemical and physical practices. Moreover, zinc in the form of NPs is more effective than their bulk counterparts and thus, they have been explored for many potential applications including in animals industry. Notably, with the advent of multi-drug resistant strains, ZnO NPs have emerged as the potential antimicrobial agents. This is mainly due to their superior properties in combating a broad spectrum of pathogens. Moreover, zinc is known as an essential trace element for most of the biological function in the animal’s body. As such, the applications of ZnO NPs have been reported to significantly enhance the health and production of the farm animals. Thus, this paper reviews the biological synthesis of ZnO NPs by the microbes, the mechanisms of the biological synthesis, parameters for the optimization process and their potential application as an antimicrobial agent and feed supplement in the animal industry as well as their toxicological hazards on animals.

Synergistic Effect of Zinc and Vitamin A on T Cell Functions

Objective To determine whether supplementation of zinc and vitamin A may improve the function of T cells in human PBMC. Methods T cells were separated and cultured in vitro, supplemented with either Zn or vitamin A alone, or both Zn and vitamin A （10^-6 mol/L, 10^-5 mol/L, 10^-4 mol/L）. After harvesting, cell proliferation, cell cycle, apoptosis, expression or function of cell-surface molecules, such as CD^3＋, CD^4＋, and CD^8＋ were detected. Results Higher proliferation level and lower apoptosis level were observed in cells supplemented with both Zn and vitaminA, showing the strongest effect （P〈0.05）. Zn-supplement increased the CD^4＋/CD^3＋ cell percentage, and simultaneously decreased the CD^8＋/CD^3＋ cell population. VA-supplement showed the opposite effect in comparison with Zn-supplement. Conclusion T-cell function can be improved depending on the zinc and/or vitamin A supplemented.

Cementitious property of NaAlO2-activated Ge slag as cement supplement

Germanium(Ge),a waste residue leaching from zinc(Zn)smelting process,has potential cementitious properties and could be recycled as a cement supplement activated by chemical reagents.In this work,a test was conducted to determine the hydration properties of Ge slag-cement-based composites with Ge slag(GS)/ordinary Portland cement(PC)contents of 0wt%,5wt%,10wt%,15wt%,20wt%,and 25wt% and water-to-binder ratio(w/b)of 0.4.The activators Ca(OH)2,AlCl3,NaAlO2,and Na2CO3 were mixed under 1wt%,2wt%,3wt%,and 4wt% dosages of GS weight.The composition and microstructure of the hydration products were investigated by the combined approaches of X-ray diffraction(XRD),thermogravimetry-differential scanning calorimetry(TG-DSC),scanning electron microscopy(SEM),and energy-dispersive X-ray spectroscopy(EDS).First,the GS cementitious property is attributed to the high content of CaSO4·2H2O.Second,the activators affected the acceleration performance in the following order:NaAlO2,Na2CO3,AlCl3,and Ca(OH)2.More importantly,the 28-day unconfined compressive strength(UCS)is 45.34 MPa at the optimum formula of 0.6wt% NaAlO2,15wt% GS,and 85wt% PC,which is 9.16% higher than the control.Thus,NaAlO2 is beneficial for the ettringite(AFt)generation,resulting in the C-S-H structure compaction.However,the Zn^2+ residue inhibited the AFt formation,representing an important challenge to the strength growth with curing age.Consequently,the GS could be recycled as a supplement to the cement under the activator NaAlO2.

The Effect of a Food Supplement and a Hair Lotion on the Progression of Androgenetic Alopecia

Background: Progressing androgenetic alopecia (AGA), in both sexes, can result in severe distress. Treatments with the capacity to slow down the progression of AGA, or even to bring it to a halt, and at the same time don’t come with side effects are consequently highly sought for. Therefore this study investigates the effect of an over-the-counter nutritional supplement and a similarly formulated topical hair lotion on the progression of AGA. Methods: Seventy-nine healthy study participants of both sexes, who were diagnosed with AGA were divided into 4 study groups. The subjects of the first group were treated with the nutritional supplement, the subjects of the second group with the topical hair lotion, the subjects of the third group with both products, and the subjects of the fourth group served as a no-treatment control. At the beginning and at the end of this nine-month study, the participants were evaluated for their hair loss status. They also answered a questionnaire for self-assessment. A part of the subjects from each study group were further analysed by phototrichography, in order to measure the number of anagen and telogen hairs. Results: It turned out that the supplement, the lotion as well as the treatment with both products not only lead to a reduction in hair loss but also to an increased anagen to telogen hair ratio, whereas no such effects could be measured for the control group. Conclusion: The results show that a systemic delivery via a nutritional supplement, as well as a follicular delivery via a topically applied lotion, both resulted in a reduced hair loss rate as well as in an increased anagen to telogen hair ratio. This demonstrates that the tested formulation is effectively slowing down the progression of AGA.

妊娠期补锌对新生儿出生体重影响的meta分析

目的系统评价妊娠期补锌对新生儿出生体重的影响,为妊娠期合理补锌提供循证依据。方法计算机检索CNKI、CBM、WanFang Data、PubMed、Web of Science、EMbase、The Cochrane Library、Ebsco等数据库,搜集妊娠期补锌对新生儿出生体重影响的随机对照试验(RCT),检索时限为建库至2022年5月。两位研究者独立背对背进行文献筛选,资料提取并对文献质量进行偏倚风险评估,使用RevMan 5.3软件进行meta分析。结果共10个RCT纳入研究,包括研究对象4267例。meta分析结果显示:与对照组相比,妊娠期补锌对新生儿出生体重的影响并不显著(MD=6.87,95%CI:-18.47~32.21,P=0.60)。亚组分析结果显示,锌基础水平低的人群妊娠期补锌(MD=-7.61,95%CI:-69.90~54.68,P=0.81)和锌基础水平正常人群妊娠期补锌(MD=16.83,95%CI:-28.17~61.84,P=0.46)比较,差异无统计学意义(P>0.05);妊娠期单独补充锌(MD=-3.09,95%CI:-55.19~49.00,P=0.91)和含锌的多种微量营养素联合补充(MD=20.95,95%CI:-40.95~82.36,P=0.50)比较,差异无统计学意义(P>0.05)。结论当前证据显示,妊娠期补锌对新生儿出生体重没有显著影响。因纳入文献的质量和数量有所限制,所以本结论有待更多高质量研究给予验证。

复方嗜酸乳杆菌联合补锌治疗应用于小儿腹泻的价值研讨

目的分析复方嗜酸乳杆菌联合补锌治疗应用于小儿腹泻的价值。方法选取2020年3月—2022年11月商河县中医医院收治的80例小儿腹泻患儿为研究对象。以抽签法分为两组,各40例。对照组给予复方嗜酸乳杆菌治疗,观察组在对照组基础联合葡萄糖酸锌治疗。比较两组临床疗效、免疫功能、血锌、症状改善时间及血清营养指标。结果观察组临床总有效率为97.50%,高于对照组80.00%,差异有统计学意义(χ^(2)=4.507,P=0.034)。治疗后,观察组免疫球蛋白A、免疫球蛋白G、免疫球蛋白M、血锌水平高于对照组,差异有统计学意义(P均<0.05)。观察组症状缓解时间及住院时间短于对照组,差异有统计学意义(P均<0.05)。观察组清蛋白、血红蛋白水平高于对照组,差异有统计学意义(P均<0.05)。结论小儿腹泻应用复方嗜酸乳杆菌联合补锌治疗能有效提高患儿治疗效果,并有助于症状早期改善,且提高免疫功能,纠正营养不良。

缺锌和补锌对运动大鼠锌营养状况的影响

通过建立大鼠缺锌模型，观察缺锌及补锌对游泳大鼠血清、肝脏锌含量和五种含锌金属酶活性的影响。结果表明：（１）血浆锌浓度和碱性磷酸酶（ＡＫＰ）活性是评价机体锌缺乏的灵敏指标；（２）血浆ＡＫＰ活性同时也是评价运动大鼠锌缺乏的较好指标，而血管紧张素Ｉ转换酶、酸性α－Ｄ－甘露糖苷酶５－核苷酸酶等不太理想；（３）运动时，缺锌大鼠血浆锌金属酶活性多数变化剧烈，表明机体内环境遭受较大破坏。而补锌后上述指标均接近正常水平，说明适量补锌有助于改善机体缺锌状况。

缺锌和补锌对大鼠血清锌、铜及血脂水平影响的研究

健康雄性Ｗｉｓｔａｒ大鼠４５只，先进行２５天锌缺乏实验，继之２１只大鼠再进行１５天锌补充实验。结果显示，缺锌可致大鼠血清总胆固醇（ＴＣ）及低密度脂蛋白胆固醇（ＬＤＬ－Ｃ）含量增高，而血清锌（Ｚｎ）、高密度脂蛋白胆固醇（ＨＤＬ－Ｃ）及其亚组分ＨＤＬ２－Ｃ含量明显下降，并且血清Ｚｎ含量与上述各指标均呈很好的剂量反应关系。适量补锌（１２ｍｇ／ｋｇ和３０ｍｇ／ｋｇ）均可使大鼠的各项指标完全恢复，而大剂量补锌（２５０ｍｇ／ｋｇ）则使ＨＤＬ－Ｃ及ＨＤＬ２－Ｃ有延迟恢复的趋向。血清铜（Ｃｕ）含量始终无明显改变。提示，膳食锌含量缺乏可致血脂代谢紊乱，而大剂量补锌又可使血脂恢复延迟，因此，膳食中Ｚｎ含量应有适当的剂量范围。

响应面法优化罗非鱼皮胶原多肽螯合锌的制备工艺

以罗非鱼皮胶原多肽(TSP-I)为配位体,采用水合体系法与硫酸锌螯合,制备可用于补锌剂的多肽螯合锌产品。以响应面法优化罗非鱼皮胶原多肽螯合锌工艺。结果表明:最佳螯合工艺条件为:反应温度60℃、pH5.3、TSP-I与硫酸锌摩尔比2:1、TSP-I浓度3.4g/100ml水、反应时间40min。在此条件下螯合率理论值为92.57%,验证实际螯合率为92.17%。

补锌对衰老大鼠睾丸细胞凋亡和一氧化氮合酶的影响

目的 探讨补锌对衰老过程睾丸细胞凋亡的影响及其可能机制。方法 选用 2 4月龄 Wistar雄性大鼠 1 6只 ,均分为实验组和对照组 ,实验 (补锌 )组和对照组分别喂养补锌和常锌饲料。喂养 4 w后 ,采用原子吸收分光光度法测定血清锌含量 ;采用放射免疫分析法测定血清睾丸酮含量 ;采用 NADPH- d组织化学法显示睾丸细胞一氧化氮合酶 (NOS)活性 ;采用原位缺口平移技术 (INST法 )显示睾丸凋亡细胞数目。结果 与对照组相比 ,老年大鼠补锌 4w后 ,血清锌含量明显升高 (P<0 .0 5) ;血清睾丸酮水平明显升高 (P<0 .0 5) ;睾丸间质细胞 NOS阳性细胞数目明显减少 (P<0 .0 1 ) ,NOS阳性细胞反应强度明显减低 ;睾丸生精细胞凋亡数目明显减少 (P<0 .0 5)。结论 锌是睾丸发育必需的营养素 ,补锌可使老年大鼠睾丸细胞凋亡数目减少 ,这种变化可能与补锌对衰老大鼠睾丸细胞 NOS活性和睾丸酮水平的调节有关。

维生素A复合其他微量营养素对3～6岁儿童营养状况的影响

目的观察维生素A复合其他微量营养素对儿童营养状况的影响。方法采用分层与整群抽样相结合的方法,在重庆市近郊7所幼儿园中随机选取3所,将所有3～6岁、符合纳入标准的350名学龄前儿童作为受试对象。按分层随机的方法,将350名受试儿童随机分成单独补维生素A组(A组)、补维生素A加锌组(AZ组)及补维生素A与多种微量营养素复合物组(AMM组)。3组受试儿童同时连续补充6个月。干预前后分别测量儿童身高、体质量,计算儿童体格发育Z评分,评价儿童营养不良的发生率;检测血清维生素A、锌、铁、钙和血红蛋白水平;在营养素干预前采用问卷方式调查儿童的一般情况、家庭状况及饮食习惯等;在营养素干预期间采用24h膳食回顾法调查受试儿童膳食营养素摄取情况。结果 24h膳食回顾调查结果显示,该地区3～6岁儿童膳食中维生素A、锌和钙摄入不足。营养素干预6个月后,3组儿童血清锌和铁水平较干预前差异均有统计学意义(P均<0.01),AZ组血清锌水平的升高幅度高于AMM组(P<0.05)。AZ组及AMM组干预后血清维生素A水平分别升高了(0.05±0.23)μmol/L及(0.09±0.28)μmol/L(P<0.05,P<0.01);单独补充维生素A组血清维生素A水平升高了(0.03±0.27)μmol/L,但差异无统计学意义(P>0.05)。AMM组儿童血清维生素A水平升高幅度高于A组和AZ组(P均<0.05);AMM组儿童血红蛋白水平升高幅度高于A组(P<0.05)。A组、AZ组及AMM组中儿童营养不良的比例均有不同程度的下降,但3组间变化值差异均无统计学意义(P均>0.05)。结论复合多种微量营养素的补充对3～6岁儿童营养状况的作用较两种微量营养素的补充未见显著性差异,儿童微量营养素的补充应根据其存在的主要营养问题选择最优营养素组合,以改善儿童营养健康状况。

军曹鱼幼鱼商品饲料中铁、锌适宜添加量的研究

在军曹鱼幼鱼商品饲料中添加铁100、200、300 mg/kg,添加锌30、1101、90 mg/kg,共投喂56d。试验结束时测定,军曹鱼成活率、质量增加率、红细胞含量、肌肉铁含量、骨骼铁、锌含量和肝脏铁、锌含量明显受饲料中铁、锌添加量的影响;血清碱性磷酸酶活性受铁、锌交互作用影响显著,饲料系数主要受铁锌交互作用的影响。以成活率和质量增加率为评价指标,军曹鱼幼鱼商品饲料中铁和锌适宜添加量分别为200 mg/kg和110 mg/kg。

维生素A、锌对学龄前儿童红细胞生成素的影响

目的对学龄前儿童补充维生素A（vitamin A，VA）、锌（Zinc，Zn），论证分析VA/Zn影响血红蛋白（hemoglobin，Hb）与红细胞生成素（erythropoietin，EPO）的反馈调节机制。方法在重庆市近郊7所规模〉200人的幼儿园中随机选取2所中的所有3～6岁符合纳入标准的232名学龄前儿童，按分层随机整群抽样的方法，以幼儿园为单位，分成单独补VA组（A组）和补VA加Zn组（AZ组）。A组与AZ组儿童又按不同VA与Hb基础水平分组，干预前贫血合并VA不足的儿童定义为Ⅰ组，Hb正常合并VA不足的为Ⅱ组，贫血合并VA正常的为Ⅲ组。营养素补充6个月，补充干预前后分别检测Hb、VA、Zn和EPO水平。结果营养素干预6个月后，血清VA水平AZ组显著升高0.05 μmol/L（P〈0.05），但A组无明显变化。A组和AZ组儿童血清Zn水平干预前后分别显著升高了2.95 μmol/L和3.67 μmol/L（P〈0.05, P〈0.01）；Hb和EPO水平较干预前均显著升高，贫血的发生率均显著下降（P〈0.05, P〈0.01），但两组间变化值差异均没有统计学意义（P〉0.05）。A组Log10 EPO与Hb的直线回归方程斜率干预后显著下降了-0.009 9（P〈0.05），但AZ组无明显变化（P〉0.05）。Ⅰ组和Ⅲ组干预后Hb水平均显著升高（P〈0.05），其中Ⅲ组Hb水平升高较Ⅱ组有统计学差异（P〈0.05）；Ⅰ组儿童Log10 EPO水平变化较其他2组更明显（P〈0.05）。结论VA调节EPO的生成能力可受机体Hb水平的影响，机体VA的营养水平影响Hb浓度对EPO的反馈性调节作用。

儿童补锌与生长发育相关性研究

目的：探讨儿童补锌对血锌水平的影响及与儿童体重、身高、智商等发育的相关关系。方法：用分层加单纯随机抽样的方法对抽取的168例儿童进行体格检查、血锌浓度测定、智商测定,并问卷调查儿童饮食、补锌等情况,采用SPSS10.0版统计软件进行多元线性回归分析。结果：①本组168例儿童血锌平均浓度为58.98μmol/L,正常血锌儿童占75.0%,低血锌儿童占25.0%。②儿童血锌水平与性别无关,与年龄有高度显著性差异（χ^2=20.08,P〈0.01）,3~6岁儿童缺锌比例较7-12岁儿童高。③血锌水平影响儿童体重、身高发育,低血锌儿童体重、身高发育指标低于正常的比例高（χ^2=24.52,P〈0.01,χ^2=29.03,P〈0.01,）。④影响血锌水平的因素主要为饮食与补锌情况。⑤影响智商的因素为血锌水平与补锌情况。结论：正常饮食儿童低血锌比例低,偏食、挑食、厌食是引起血锌偏低的主要因素,血锌水平影响智商高低。科学对待儿童缺锌与补锌,理性对待广告宣传,纠正不良饮食习惯是保障儿童锌营养的关键。

补充睾酮对缺锌和补锌大鼠游泳能力和睾酮合成的影响

本实验动态观察了补充睾酮对缺锌和补锌大鼠游泳能力和力竭性游泳前后睾丸和血清睾酮、锌水平的影响，结果显示：补充睾酮，对缺锌引起的大鼠游泳能力降低、睾丸和血清睾酮及锌水平的下降均无改善作用，反而造成睾酮合成的抑制、睾丸的萎缩。缺锌大鼠经过补锌，游泳能力、睾丸和血清睾酮及锌水平均明显改善，力竭性游泳后，未补睾酮大鼠的睾丸睾酮含量逐渐恢复上升，而补充睾酮大鼠睾九睾酮却呈持续下降趋势。结果表明，对于缺锌引起的睾酮水平和运动能力下降，补锌是唯一有效的方法，补充睾酮不仅无益，反而有害。

补钙对12～17岁青少年锌、铁吸收率的影响

目的 通过代谢平衡实验探讨补钙对中国青春期少年锌、铁吸收率的影响。方法 从320名参加1年补钙实验的4组12～17岁少年中，每组随机抽取男、女生各10人，共80人。采用代谢平衡的方法，收集研究对象10天内摄入的食品、排出的粪便和尿液样品，用电感耦合等离子体发射光谱法测定样品中的钙、铁、锌含量。结果不同补钙组之间钙摄入量有差异，但铁、锌摄入量差异无显著性。不同补钙组之间钙、铁、锌的表观吸收率差异无显著性。男生钙、铁、锌的表观吸收率平均为69．4％、12．5％和29．9％，女生的分别为46．4％、20．9％和35．3％。铁的表观吸收率与青春发育水平有关。男生钙摄入量为600～800mg／d时，钙、铁、锌的表观吸收率均处于相对较高水平（75．3％、23．2％和36．4％）。结论钙摄入量低于1400mg／d时，不影响12～17岁少年锌、铁的吸收率。当男生钙摄入量为600～800mg／d时，更有助于钙、铁、锌的吸收。

锌与酒精性肝损害的相关性研究

锌(Zinc,Zn)是重要的抗细胞凋亡因子,在抵御细胞中毒性损伤的感应性方面发挥着重要的生理作用。实验和临床酒精性疾病普遍存在酒精诱导的肝细胞凋亡,多种途径参与酒精诱导的肝细胞凋亡及肝损害。在酒精应激情况下,Zn可以保护肝细胞,拮抗肝细胞凋亡,抵御酒精性肝损害。补Zn可以缓解酒精性肝损害的某些临床表现和肝性脑病的病情。