They compared the skin secretions of various species and found that human skin emits much more volatile compounds than the skin of other mammals, including that of primates.
Our sweat contains, besides water and salt, and protein, amino acids, urea, ammonia and lactic acid. And they give a distinct smell. In addition, at the age of puberty, our sweat glands are colonized by bacteria that contribute to each odor. This is why adults have a stronger smell than babies. Also, experts say that men sweat more than women only in terms of quantity of water, not volatile compounds.