很大一部分以前人的早死是由毒重金属(铅、铜等)、微生物代谢产物、缺乏食物和必需品、卫生条件差等等引起的。就铅(20世纪70年代还很流行)、铜 、汞可以使寿命保持在 50 岁以下。目前还没有研究表明药物在延长人类寿命方面的作用。 现在,一些研究小组正在寻找某些可以延长寿命的药物。
A large portion of deaths (before this drugs treatment culture) was caused by toxic heavy metals (lead, copper, etc), microbe's metabolic by-products, lack of foods and essentials, poor hygenes, etc. Just lead (which was still very prevalent in 1970s), copper and mucury can keep lifespans below 50. No study has been done to show drugs' roles in extending human lifes. Now, some research groups are looking for specific kinds of drugs for extending lifespans.