A composition comprising: (a) one or more immune boosting agents； (b) a botanical extract with antimicrobial activity； and (c) a base composition comprising one or more gelling agents and water is provided. Preferably the one or more immune boosting agents are selected from selenium, zinc, vitamin D3, vitamin A, vitamin E and vitamin C. The composition may preferably comprise each of selenium, zinc, vitamin D3, vitamin A and vitamin C. The composition may preferably comprise each of selenium, zinc, vitamin D3, vitamin E and vitamin A. The botanical extract with antimicrobial activity may comprise an effective amount of gingerol or shogaol, preferably derived from ginger. The botanical extract with antimicrobial activity may comprise an effective amount of a flavonoid or a flavanol, preferably derived from elderberry, cranberry, blueberry or grape. The gelling agent is preferably one or both of a gellan gum and/or xanthan gum. The composition may further comprise a carbohydrate, preferably maltodextrin or starch. The composition is preferably for use in reducing or minimising microbial infections, in particular microbial infections which arise following physical exercise. Preferably the composition is for use by athletes involved in physically demanding training or competitions. The microbial infection is preferably one of leptospirosis, gastroenteritis, schistosomiasis, hepatitis, herpes gladiatorum, tinea gladiatorum, measles or upper respiratory tract infection (UTI).
