A body odor researcher has identified a growing trend he deems “not a good idea.” The trend involves layering different fragrances with natural body odor, intentionally mixing perfumes or colognes with one’s own scent. While proponents believe this creates a unique personal fragrance, the researcher cautions against the practice. He suggests it could potentially mask underlying health issues detectable through natural body odor. Furthermore, the deliberate mixing may lead to unpredictable chemical reactions with skin and disrupt the skin’s natural microbiome. The scientist stresses that natural body odor provides valuable information about a person's health and should not be intentionally obscured. He believes this trend is potentially harmful and advises against participation.