bronson colloidal trace minerals high potency chemical free microscopic essential mineral particles , 4 fl. oz. bronson bronson’s colloidal trace minerals is a high-quality, multi mineral supplement that consists of ultra-fine microscopic mineral particles suspended in purified water to support easy absorption.* colloidal trace minerals is an effective way of getting trace elements that your body utilizes to support overall good health and well-being.* additionally, our colloidal trace minerals provides protective cobalt blue glass packaging to help our microscopic mineral particles maintain purity and potency by filtering out potential harmful light. our cobalt blue bottle blocks oxygen from degrading the integrity of our mineral particles.