meat eaters urine is different to veggies!

Well it seems it is! You can actually measure meat intake by examining the urine. Weird, but interesting enough to slip into the 'off topic' I reckon! Notice the first line (my bold) - Meat intake has been positively associated with incidence and mortality of chronic diseases, including diabetes, heart disease, and several different cancers,
Here's the details:

Quote :

http://www.ncbi.nlm.nih.gov/pubmed/21527577?dopt=Abstract

Cancer Epidemiol Biomarkers Prev. 2011 Apr 28. [Epub ahead of print]
Urinary biomarkers of meat consumption.
Cross AJ, Major JM, Sinha R.
Source

1Division of Cancer Epidemiology & Genetics, National Cancer Institute.
Abstract
BACKGROUND:

Meat intake has been positively associated with incidence and mortality of chronic diseases, including diabetes, heart disease, and several different cancers, in observational studies using self-report methods of dietary assessment; however, these dietary assessment methods are subject to measurement error. One method to circumvent such errors is the use of biomarkers of dietary intake, but currently there are no accepted biomarkers for meat intake.
METHODS:

We investigated four analytes (creatinine, taurine, 1-methylhistidine, and 3-methylhistidine) specifically found in meat and excreted in urine. Twenty-four hour urine samples were collected from 17 individuals on controlled diets containing varying levels of meats: vegetarian (0 g/day), low red meat (60 g/day), medium red meat (120g/day), and high red meat (420 g/day), as part of two randomized cross-over feeding studies.
RESULTS:

When compared to the low red meat diet or the vegetarian diet, the urinary levels of all four analytes were significantly higher in urine samples collected after 15 days of a high red meat diet (P<0.0001). Only urinary 1-methylhistidine and 3-methylhistidine were statistically significantly different for every diet type, increasing as the amount of meat in the diet increased (P<0.01 for 1-methylhistidine and P<0.05 for 3-methylhistidine). Furthermore, urinary excretion of 1-methylhistidine and 3-methylhistidine elevated with increasing meat intake in every individual.
CONCLUSIONS:

Urinary 1-methylhistidine and 3-methylhistidine may be good biomarkers of meat intake. Impact:To determine the public health impact of red meat on cancer risk, biomarkers are crucial to estimate true intake; these potential biomarkers should be further investigated in free-living populations.