Now scientists have studied the underarm microbiome and identified a unique set of enzymes in the bacterium Staphylococcus hominis that is effective at breaking down sweat molecules into compounds known as thioalcohols, an important component of the characteristic body odor smell.

Does bacteria make things smell bad?

When food goes bad and starts to become pungent, it is most often due to the growth of spoilage microbes such as bacteria, yeasts and mold. Odors can come from two sources: chemicals that are released from the food as the microbes decompose it, or chemicals produced directly by the microbes themselves.

Why do I smell bad even with good hygiene?

Sweat glands called “apocrine sweat glands” are found in the armpits, under the breast, and in the groin. As sweating occurs in these areas, bacteria that like warm, moist areas, break down the sweat to produce body odor. Excessive sweating or an overgrowth of bacteria in such areas can result in bromhidrosis.