Respected Lauren, hi I evaluated your query thoroughly. *Melatonin has nothing to do with unusual urinary odour. *It`s related to imbalance in urinary pH following hydration disorder. - drink plenty of liquids preferably boiled water, coconut water, green tea, rice water, butter milk , lemon juice etc. - maintain hygiene of private parts to avoid bacterial invasion. - avoid smoking / alcohol / abuse substances of any form if using. - get a Urine examination report done if problem persists. Hope this clears your query. Thanks for using Health Care Magic & giving me an opportunity to assist you. Feel free to ask any health related query in future. Wishing you fast and speedy recovery from the same. Regards dear take care.