Isotonic vitamins and supplements are absorbed at a much higher rate than pill supplements because they are delivered undiluted to the small intestine where absorption occurs. Pill supplements typically have only a 10-20% absorption rate, meaning 80-90% is not absorbed and passes through the body. In contrast, isotonic liquid supplements have a 95-98% absorption rate because they bypass digestion and go directly into the bloodstream, allowing for greater nutrient delivery to cells.