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Asparagus pee...

Discussion in 'The Lounge' started by rdn2blazer, Apr 8, 2007.

  1. rdn2blazer

    rdn2blazer 1 ton status Premium Member

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    ...REALLY STINKS :doah::tongue1: :weld: that is all. :D
     
  2. MTChevy

    MTChevy 3/4 ton status Premium Member

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    haha we actually did that as an experement in high school science
     
  3. mxfireman

    mxfireman 1/2 ton status

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    and you figured out what? The obvious! That pee smells after eating asparagus
     
  4. gibby2268

    gibby2268 1/2 ton status

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    apparantly it doesn't affect everyone that way though....sure does me though!
     
  5. broc944

    broc944 1/2 ton status

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    Yes it does!
     
  6. gibby2268

    gibby2268 1/2 ton status

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    :D

    Allison and McWhirter first showed that the ability to produce methyl mercaptan after eating asparagus is not universal.4 Some people would produce detectable amounts in the urine after eating only three or four spears of asparagus, while others would produce none even after eating as much as one pound (0.45 kg) of asparagus. In their random sample of 115 human subjects, they demonstrated that this ability occurred in about 40% of the population, with an autosomal dominant inheritance pattern.4 In a larger study of 800 volunteers, Mitchell and co-workers verified these findings in both men and women, and from a pedigree analysis of two families, with one spanning three generations, the autosomal dominant mode of inheritance was also confirmed.5 Interestingly, the BMJ later reported a study in which all the subjects could produce methyl mercaptan, but their ability to smell it in the urine differed. Those who were able to smell the odour in their own urine could smell it in the urine of anyone who had eaten asparagus irrespective of whether or not that person could smell it. The authors suggested that the ability to smell these substances in one's or, indeed, another's urine was also genetically determined.6
    Apart from methyl mercaptan, other metabolites may be responsible for the smell of the urine after eating asparagus. Gas chromatography of the urine has shown that the odour could be caused by S-methyl-thioacrylate and S-methyl-3- (methylthio)thiopropionate,7 while a combination of methyl mercaptan, dimethyl sulphide, and small amounts of sulphur-oxidised compounds could also be responsible.8 The source of these metabolites is unknown, but the last paper postulates asparagusic acid, which is specific to asparagus and, when given to humans, causes the same characteristic smell in the urine.8
     
  7. broc944

    broc944 1/2 ton status

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    Thank you Bill Nye.:D :D
     
  8. MTMike

    MTMike 1/2 ton status

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    My poop stinks after I eat food :dunno: :haha:
     
  9. gibby2268

    gibby2268 1/2 ton status

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    :D :D
     

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