May chang smells like lemon sherbet, brighter and sweeter than lemongrass and less grassy. About three quarters of the oil is citral, split between its two forms. In lab tests it produced unusually large clear zones against Candida, with modelling pointing at citral binding fungal enzymes.^[1] Reviews confirm broad activity against food-poisoning bacteria and good cell protection.^[2] Citral is a known skin sensitiser, so this is one to keep well diluted.^[3]