Researchers tested mica from Bangladeshi river sand and found it safe for skin—zero irritation in rabbit tests, heavy metals within safe limits, and no cancer risk. The mica gave products a silky texture and luminous finish, plus some types showed mild antibacterial activity against common bacteria like staph and salmonella.

Scientists analyzed the mica's chemical makeup, tested it for heavy metals and purity, evaluated how it felt on skin (sensory testing with trained panelists), checked for irritation using rabbit skin, and tested its ability to fight bacteria and fungi.

Funding not disclosed in abstract