There is some evidence to suggest that henna may have certain antimicrobial properties, including activity against fungi. Henna has been traditionally used in some cultures as a treatment for a variety of skin conditions, including fungal infections.
One study found that henna extract was effective at inhibiting the growth of several different species of fungi, including Candida albicans, which is a common cause of fungal infections in humans. Another study found that henna extract had antifungal activity against a variety of dermatophytes, which are fungi that cause infections of the skin, hair, and nails.
However, it is important to note that the use of henna as an antimicrobial agent has not been extensively studied, and more research is needed to fully understand its potential effectiveness and safety. It is not recommended to use henna as a substitute for traditional medical treatments for fungal infections.