您现在的位置:首页 > 科普 > 保健养生 > 养生指导
鸡蛋煮多长时间能保存营养素?
发布时间:2011-07-06      来源:家庭医生在线

  煮鸡蛋看似简单,却不好把握火候,时间过短会使蛋黄不熟,时间过长会使鸡蛋变老不好吃。对此,据介绍,其实煮鸡蛋的最佳时机很好把握。凉水下锅,水开后算好5分钟,煮出来的鸡蛋既被杀死了有害致病菌,又能比较完整地保存营养素。

  如果鸡蛋在沸水中煮超过10分钟,内部会发生一系列化学变化。蛋白质结构变得更紧密,不容易与胃液中蛋白质消化酶接触,所以较难消化。蛋品中蛋白质含有较多的蛋氨酸,经过长时间加热后,它会分解出硫化物,它与蛋黄中的铁发生反应,形成人体不易吸收的硫化铁,营养损失较多。

  煮不熟的鸡蛋危害更大。生鸡蛋不但存在沙门氏菌污染问题,还有抗酶蛋白和抗生物素蛋白两种有害物。前者会影响蛋白质的消化吸收;后者能与食物中的生物素结合,导致人体生物素缺乏,产生精神倦怠、肌肉酸痛等症状。而鸡蛋一经煮熟,上述两种物质才会被破坏。

  此外,煮蛋时还可掌握以下技巧,以防止营养素的流失:水必须没过蛋,否则浸不到水的地方蛋白质不易凝固,影响消化;煮前把蛋放入冷水浸泡一会儿,以降低蛋内气压;然后用中等火候,冷水煮沸,即可防止蛋壳破裂,避免营养素流失。

分享到:
document.getElementById("bdshell_js").src = "http://bdimg.share.baidu.com/static/js/shell_v2.js?cdnversion=" + Math.ceil(new Date()/3600000)

黑色食品营养高 平衡饮食更重要  上一篇 | 下一篇  专家教您:剩菜如何打包还能留营养

function submit_comment() { if (checkFormValueById('frmComment')) { $('#frmComment').showLoading(); var frmComment = document.getElementById('frmComment'); frmComment.action = '/sitefiles/services/cms/action.aspx?publishmentSystemID=1&styleID=23&type=comment&channelID=8&contentID=22129'; frmComment.target = 'iframeComment'; frmComment.submit(); } } function stlCommentCallback(jsonString){ $('#frmComment').hideLoading(); var obj = eval('(' + jsonString + ')'); if (obj){ $('#commentSuccess').hide(); $('#commentFailure').hide(); if (obj.isSuccess == 'false'){ $('#commentFailure').show(); $('#commentFailureMessage').html(obj.failureMessage); }else{ $('#commentSuccess').show(); $('#commentContainer').hide(); } } }
  event_observe('Content', 'blur', checkAttributeValue);
提交评论
function getQueryString() { var i, len, params = '', hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&'); for(i = 0, len = hashes.length, len; i < len; i+=1) { hash = hashes[i].split('='); if (hash && hash.length == 2){ value = encodeURIComponent(decodeURIComponent(decodeURIComponent(hash[1]))); params += (hash[0] + '=' + value + '&'); } } if (params && params.length > 0) params = params.substring(0, params.length - 1); return params; } function stlDynamic_ajaxElement_1_519(pageNum) { try { var url = "/sitefiles/services/cms/dynamic/output.aspx?publishmentSystemID=1&" + getQueryString(); var pars = "pageNodeID=8&pageContentID=22129&pageTemplateID=81&isPageRefresh=False&pageUrl=3aXSaKwVkvxUWuZ3U2Sx0add0VuwbTx5ql53jPnUGeBBhyLxA0slash0aS8w57u5X530LV3beC&ajaxDivID=ajaxElement_1_519&templateContent=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"; if (pageNum && pageNum > 0) { pars += "&pageNum=" + pageNum; } jQuery.post(url, pars, function(data,textStatus){ jQuery("#ajaxElement_1_519").html(data); }); }catch(e){} } stlDynamic_ajaxElement_1_519(0);
function tabChange(obj,id) { var arrayli = obj.parentNode.getElementsByTagName("li"); //获取li数组 var arrayul = document.getElementById(id).getElementsByTagName("ul"); //获取ul数组 for(i=0;i
junjian99.com  关注白领健康  专注疑难杂症
关于君健网和医学 - 网络营销中心 - 网站导航 - 招聘信息 - 联系方式 - 隐私权政策
©2005-2015   君健网    var cnzz_protocol = (("https:" == document.location.protocol) ? " https://" : " http://");document.write(unescape("%3Cspan id='cnzz_stat_icon_1253186545'%3E%3C/span%3E%3Cscript src='" + cnzz_protocol + "s95.cnzz.com/z_stat.php%3Fid%3D1253186545%26show%3Dpic' type='text/javascript'%3E%3C/script%3E")); 湘ICP备13009358号-1
var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "//hm.baidu.com/hm.js?9d70d089441fbc826ee2f94492d17bdc"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); (function(){ var bp = document.createElement('script'); bp.src = '//push.zhanzhang.baidu.com/push.js'; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(bp, s); })(); AddTrackerCount('/sitefiles/services/cms/PageService.aspx?type=AddTrackerCount&publishmentSystemID=1&channelID=1&contentID=0', 1); AddTrackerCount('/sitefiles/services/cms/PageService.aspx?type=AddTrackerCount&publishmentSystemID=1&channelID=8&contentID=22129', 1);