“Apocrine sweat tends to comprise extra lipids and proteins, whereas eccrine sweat is generally composed of water and electrolytes,” he mentioned. “When micro organism break down these substances, the ensuing odours can differ. Bacterial motion on the lipids and proteins in apocrine sweat results in the attribute physique odour.”
If you happen to’re questioning what lipids are, they’re an ingredient in sebum, the identical pimple-causing stuff you’ve been combating in your adolescent and grownup life. “Sebum primarily includes lipids, triglycerides, wax esters, squalene and mobile particles. When uncovered to air and micro organism, these elements can bear oxidation and breakdown, leading to a barely oily and typically musty odor,” mentioned Assoc Prof Lim.
HOW DOES THE “OLD PERSON SMELL” COME ABOUT?
A couple of issues may give rise to this distinctive odour; one in every of which is 2-nonenal. A study on topics between the ages of 26 and 75, famous that this colourless, insoluble, unsaturated aldehyde was detected solely in these aged 40 years and older. By the way, 2-nonenal is similar compound present in aged beer and buckwheat, and has been described to odor greasy and grassy like fats and cucumber.
The smell-inducing 2-nonenal is a by-product of omega-7 monounsaturated fatty acid after oxidation, mentioned dermatologist Dr Eileen Tan from Eileen Tan Pores and skin Clinic & Associates, Mount Elizabeth Novena Hospital. “Age-related physique odour doubtless has nothing to do with private hygiene,” mentioned Dr Tan.