Yet another way your hair can fink on you!

The bottled water, soda pop, or micro brew-beer that you drank in Pittsburgh, Dallas, Denver or 30 other American cities contains a natural chemical imprint related to geographic location. When you consume these beverage you may leave a chemical imprint in your hair that could be used to track your travels over time, a new study suggests.

The findings, believed to be the first concerted effort to describe the use of beverages as a potential tool to investigate the geographic location of people, appears in ACS’ bi-weekly Journal of Agricultural and Food Chemistry: “Links between Purchase Location and Stable Isotope Ratios of Bottled Water, Soda, and Beer in the United States.”

Lesley Chesson and colleagues explain that the body removes hydrogen and oxygen atoms from water (H2O), and beverages containing water, and incorporates them into proteins, including the protein in hair. Hydrogen and oxygen exist in different forms, or isotopes. The proportions of those isotopes vary in a predictable way geographically, with higher values in low-latitude, low-elevation, or coastal regions, for instance, and lower values elsewhere. Since manufacturers usually use local or regional water sources in producing beverages, isotope patterns in hair could serve as a chemical “fingerprint” to pinpoint the geographic region where a person has been.

The scientists analyzed isotope patterns in bottled water, soda pop, and beer from 33 cities and found that patterns in the beverages generally matched those already known for the tap water. They noted that the isotope pattern in beverages tends to vary from city to city in ways that give cities in different regions characteristic “iso-signatures.”

A person who drinks a beer or soda in Denver, Des Moines, or Dallas, for instance, consumes a different isotope signature than a person in Las Cruces, Las Vegas, or Laramie. The finding may help trace the origin of drinks or help criminal investigators identify the geographic travels of crime suspects and other individuals through analysis of hair strands, the study suggests.

Gotcha!

2 thoughts on “Yet another way your hair can fink on you!

  1. honorarynewfie says:

    Neat idea, but not quite as bullet-proof as it may seem.
    Way back when, before it was almost only available on draught, Guinness bottles used to have different coloured tops to distinguish which brewery each bottle had been brewed in. Those in the know would have a preference for a particular coloured top because they preferred the (subtle) difference in one particular brew as opposed to others.
    I, myself, stopped favouring Boddington’s beer when they moved the brewing from one place to another; the water in the new location was, I knew, fairly foul when coming out the tap, and this was reflected in the taste of the beer.
    So while it may be true that the isotopic signature is left in the consumers hair, it only proves the origin of the what they have drunk, not where they have been.

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