studies on long-term enema use

Does anyone know of and legitimate double-blind studies on the long term regular use of enemas. I have been doing them for about 50 years and I believe I look younger than my peers. My health has also been pretty good. I feel a sense of well -being after my enemas...usualy a couple at a time about twice a week using plain water. Also, it seems that Propaul is a regular contributer to this site. Perhaps others in addition to myself are curious about his background and qualifications professionally?

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