Microbes are an integral part of most, if not all multi-cellular organisms. In fact, these organisms are the way they are because of the tiny partners they house within and on them. These microbes constitute the microbiome: an 'invisible organ' weighing approximately 2.5 to three kilograms in an adult human and much more in larger animals.
), acetylcholine, norepinephrine, oxytocin and indole metabolites. Indole derivatives are obtained when gut microbes metabolize the essential amino-acid, tryptophan.is considered a"feel good" hormone and is often associated with positive emotions. However, low levels of this molecule may contribute to anxiety. On the other hand, indoles are linked to satiety, resulting in a tendency to eat less, and are associated with weight loss.
These smelly signals can, at a distance or at a close range, prompt happiness, enthusiasm, anxiety, attraction, fear or . The microbially-concocted odors are a very important tool in the communication arsenal that most organisms—including humans—rely on to send or receive non-verbal messages.is home to a diverse range of microorganisms known to contribute to different odors. Bacteria like Staphylococcus and Corynebacterium lodge in the warm and moist underarm region of the skin where the apocrine glands, a source of chemicals, abound.
Truffles — the highly sought-after edible fungus — recruit select microbes to generate aromatic alcohols that lure small mammals to dig them up, which promotes the dispersal of the truffle’s spores. Credit: ShutterstockIn other mammals, odoriferous compounds like trimethylamine or pentanoic acid entice mates, while in animals endowed with a scent pouch, they lure prey, defend or mark territories.
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