茶叶：中老年护牙之友
<P> 黄老伯是远近闻名的“吃茶大户”，不管是好茶差茶，他都笑呵呵地接受。</P>
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<P> 他不但泡着浓茶，还要嚼<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>。看到他瘦瘦的样子，大家知道饮浓茶大概可以减肥或预防肥胖症。但是，看到黄老伯那一口被茶染黄的牙齿，竟然到了70岁还一颗也未烂掉，更让人惊奇了!</XOYU_CMS_CODE:NEWS:IN_LINK></P>
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<P> 是的，<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>的确对人的牙齿有益。 </XOYU_CMS_CODE:NEWS:IN_LINK></P>
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<P> 专家们说，要想拥有一口健康洁白的牙齿，当然需要养成每日刷牙的良好习惯，不过，专家还会告诉你，每日饮茶对牙齿也大有益处。原因是<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>‘中含有丰富的氟化物，能坚固牙釉质，并能够防止口腔中形成过量的酸性物质。 </XOYU_CMS_CODE:NEWS:IN_LINK></P>
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<P> 每一种<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>都含有丰富的氟化物，在冲泡过程中，这些营养物质能够转移到热水中。氟化物能够坚固牙釉质并防止龋齿的形成。仅1升<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>红茶</FONT></A>就能为人体提供大约2毫克氟，这个数量能够满足，个成年人1天所需氟含量的50%。每千克干燥的<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>含有40毫克到330毫克的氟，比一般植物要高10倍乃至几百倍。牙科研究人员研究了世界各地的<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>，发现中国的<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>乌龙茶</FONT></A>和<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>绿茶</FONT></A>含氟量最高。此外，新采摘的<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>中含氟量较高;低档茶含氟量要高于高档茶;粗老<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>高于茶芽和嫩叶。因此，常用低档<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>冲泡的茶水漱口，是个不错的选择。</XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></P>
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<P> 另外<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>中还含有多酚类化合物，它能防止龋齿的形成。龋齿也叫蛀牙，是因口腔中的组织将含糖类和淀粉类的食品分解为酸性物质而造成的。多酚类化合物能够阻止淀粉在口腔中转化为葡萄糖，而葡萄糖正是导致牙斑里细菌生长和制造酸性物质的罪魁祸首。有实验显示，当被试者用<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>红茶</FONT></A>每隔3分钟漱口5次，每次30秒，牙斑细菌就停止生长和制造酸性物质。值得一提的是，由于<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>绿茶</FONT></A><XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>茶叶</FONT></A>在生产过程中就没有被氧化，所以它含有比<XOYU_CMS_CODE:NEWS:IN_LINK><A href="http://www.china-tea.org/" target=_blank><FONT color=#800080>红茶</FONT></A>更多的多酚类化合物。 </XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></P>
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<P> 饮茶还能消除口腔异味。因为茶中的果胶等物质，与唾液发生化学反应，能增强口腔的抗菌能力。</P></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK></XOYU_CMS_CODE:NEWS:IN_LINK>