道家强肾秘功
凡遇大小便时，舌舐上腭，把牙齿咬紧，两手握拳。两脚趾抓地，闭气提肛，目视顶门，然后小便。便完后缓缓放松即可。此法能固精强肾，健骨固齿，确有神效。若能在年轻之时或牙齿完好之前起炼，即年过八九十岁，牙齿也不蛀虫脱落，继续可吃炒豆硬物。
From X
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