Unpleasant body odors could be a sign of a disease. But even when the cause of the disease is known - an example is trimethylaminuria or TMAU - there are no one-size-fits-all solutions. Elimination of choline and other essential nutrients from diet can be harmful and unhelpful. Everyone has their own unique needs, with individual combinations of foods, activities and optimal environmental conditions. ...
The Internet provides plenty of opinions.
Medical sites talk about diseases like chronic kidney failure, hepatic cirrhosis or H. pylori infection. Fitness sites recommend drinking more water, reevaluating protein sources, nutrition programs (like Paleo diet) and eating more carbohydrates.
How exactly certain diets lead to particular odors? And what's the Science behind it? Ammonia may be formed during the alkaline hydrolysis and deamidation of proteins - by our own metabolism and the metabolism of microbes that call us home. If our kidneys can't handle the load of nitrogen, it's excreted as ammonia in sweat. Excretion increases 10 times as temperature goes from 70 to 100 Fahrenheit.
Aurametrix correlates users' actions and reactions based on information on diet and symptoms the system has. Preliminary correlations in the Aurametrix knowledge base show how exactly excess protein leads to ammonia-like odor.
But wait a minute - what about excess fat?
An example provided by one of our users is very interesting. The user logged a few foods he thought were contributing to odor. These were different odors according to the user - ranging from "Ammonia-like" to "Fishy", sharp, cloying and stale. Aurametrix, however, recognized that all these odors described by the user may be related to nitrogen-containing compounds. When these three data points were analyzed along with four foods that the user did not associate with any odors, Aurametrix displayed only one result:
Hexadecanoic acid - commonly known as Palmitic acid - is one of the most common saturated fatty acids in the Western diet. Palm oil and coconut oil contain especially high levels of this acid. What effect does this acid have on metabolism? It down-regulates glycose metabolism and protein metabolism, affecting calcium or mRNA binding proteins. So there may very well be a connection!
May 30, 2011: Tryptophan in food: Will it make you happy, sleepy or smelly? And the answer is ... either or all of the above. And this is not a complete list of all that can happen. In some rare conditions, for example, tryptophan could also make your pee purple.