DMSO is a colourless liquid, which is rapidly absorbed when administered dermally or orally 10, 11. DMSO is used as a cryoprotectant because it decreases osmotic stress and cellular dehydration, and thereby enables stem cells to be stored for several years 12. DMSO is mostly excreted through the kidneys, but a small part is excreted through the lungs and liver 10. Part of the DMSO is transformed to the volatile metabolite dimethyl sulfide, which gives a characteristic garlic- or oyster-like smell when excreted through the lungs 10. DMSO may induce histamine release, which can be the reason for adverse reactions such as flushing, dyspnoea, abdominal cramps, and cardiovascular reactions 11.