Isotonix is a brand of dietary supplements, primarily known for its unique isotonic delivery system. The brand's products are formulated as powdered supplements that, when mixed with water, create a solution with a similar osmotic pressure to the body's fluids (blood, plasma, and tears). This isotonic state allows the supplements to pass efficiently into the small intestine and be rapidly absorbed into the bloodstream, bypassing the digestive process that can degrade nutrients. The brand claims this delivery method results in superior bioavailability and nutrient absorption compared to traditional pill or capsule supplements.