很大一部分以前人的早死是由毒重金屬（鉛、銅等）、微生物代謝產物、缺乏食物和必需品、衛生條件差等等引起的。就鉛（20世紀70年代還很流行）、銅 、汞可以使壽命保持在 50 歲以下。目前還沒有研究表明藥物在延長人類壽命方麵的作用。 現在，一些研究小組正在尋找某些可以延長壽命的藥物。
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.
