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Isotonix is the world’s most advanced nutraceutical because it offers the fastest and most efficient delivery system of all nutraceutical supplements. This advanced formula of vitamins and minerals results in less work for the body, maximum absorption and very little nutritive value is lost.


A scientifically proven nutritional delivery system that maximizes nutrient availability and absorption by duplicating the osmotic pressure of the human body.


The act or process of absorbing or assimilating substances (such as nutrients) into cells, tissues and organs through diffusion or osmosis.

Nutrient-dense Isotonix enters the digestive tract in liquefied form and supplies nutrients at just the right rate to your body, eliminating the need for further breakdown in the stomach. 

Whereas tablets & capsules remain in your digestive tract for hours, the isotonix solution is quickly absorbed by the body for usage.

Within eight to 12 minutes, the stomach has emptied completely; the nutrients contained in the Isotonix solution have successfully entered the bloodstream for delivery to the body’s cells as needed.




Isotonix products are formulated with the proper balance of fructose, d-glucose, citric acid, potassium bicarbonate and other key ingredients to assure that they are isotonic when properly prepared. This combination of ingredients is necessary to maintain the flavor, isotonic character, pH and delivery efficiency of these nutritional supplements. Normally, when you ingest a daily vitamin or nutritional supplement tablet, your body must work for up to four hours digesting and absorbing the vitamins and nutrients. During this lengthy breakdown process, a percentage of the nutritive value is lost. But because Isotonix products are powders, none of the fillers, binders, coatings and lubricants that are common to tablet manufacturing are necessary. There are no gelatin capsules or fillers. As a result, the amount of time and work necessary to absorb a supplement is greatly decreased.


Broken down to its roots, iso means ‘the same’ and tonic means ‘pressure or tone.’ When used to describe solutions that are meant for consumption, isotonic means having the same fluid pressure as body fluids. Tears, blood plasma, lymph and other body fluids are all isotonic. When we ingest food, gastric (stomach) juice is secreted onto the food, and muscular contractions of the stomach mix the contents until a reasonably uniform solution is achieved. The solutions of food (chyme) that enter the small intestine for absorption are made isotonic by the action of the stomach in a time-consuming process. The fluid pressure of food or isotonic solutions across semipermeable membranes, such as the walls of the small intestine, is generally referred to as having a particular osmolality or tonicity. Osmolality is measured in units referred to as milliosmoles/kilogram of water (mOsm/kg). It can be said that when solutions on opposite sides of a membrane have the same osmolality, they are iso-osmotic or isotonic. Normal human blood serum (the fluid portion without cells and platelets) has an osmolality of 288 mOsm/kg, as do most other fluids in the body. Therefore, in physiological terms, when a solution’s osmolality is the same, or nearly the same, as that of normal human blood serum, it is referred to as isotonic.


Concentration and absorption are factors that go hand in hand for the proper use of nutritional supplements. Concentration – the amount of nutrient dissolved in a given amount of a solvent such as water or stomach fluid – is usually directly related to the efficiency of nutrient absorption. This is especially true in the process of passive diffusion. Passive diffusion works when the concentration of nutrients in the lumen of the small intestine is higher than the concentration inside the intestinal cells.The nutrients “flow” down from the gradient from high to low concentration. Since Isotonix® products experience little dilution in the gastrointestinal tract, they arrive at the absorption sites in high concentration and ensure efficient absorption.Because of their physiological character, Isotonix® solutions undergo very little dilution in the body before they reach the absorption sites. They are the ideal vehicle for rapid nutrient utilization. Isotonix® are the world’s most advanced nutraceuticals.


The longer a supplement stays in the stomach, the longer the time before absorption can begin, because no appreciable absorption occurs from the stomach. Often the rate-limiting step in the absorption process is the time it takes for the tablet or capsule to disintegrate, and the nutrients to dissolve and equilibrate to the proper (isotonic) state to leave the stomach. When all this has been completed — up to 40 minutes after ingestion — the diluted, acid-attacked nutrients can enter the small intestine for absorption.


Nutrients that are already isotonic do not need to be broken down into an isotonic state. Therefore, gastric emptying occurs more rapidly. Biological sensors in the gastrointestinal tract detect that the ingested solution is isotonic and at a correct pH. This causes the pyloric valve at the lower end of the stomach to remain open, allowing the concentrated solution to be squirted into the small intestine by stomach contractions. Absorption of the nutrients by the intestinal mucosa then starts to occur.


Creating a superior supplement begins with quality ingredients. The raw materials used in Isotonix products undergo a comprehensive evaluation by our manfacturers to ensure that they meet stringent purity and potency requirements.


Verification and approval by a Certificate of Analysis (COA) is required for each raw material. Approved raw materials are subject to laboratory confirmation of physical characteristics and material potency, as well as analysis for microbiological contamination and heavy metals.


Each Isotonix product is then carefully prepared following a written master manufacturing record and every batch is reviewed and approved by our manufacturer's highly trained quality control personnel. Products are also inspected at Market America's warehouse for damage, label accuracy, appearance, taste and identity prior to release.


Each of Market America's production facilites are required to meet GMP (Good Manufacturing Practice) standards. This means they are periodically inspected and approved by either the Food and Drug Administration or the United States Department of Agriculture for their strict adherence to Standard Operating Procedures, employee training, product specifications and supplier/vendor qualification procedures.


All manufacturing equipment that comes in contact with our products must be cleaned according to mandated procedures between production runs and verified to ensure sanitation has been performed prior to use. Product samples are also collected at various stages of production for chemical and microbiological analysis to ensure consistency and purity. Lot code confirmation, weight checks, label and material checks are performed according to exact written procedures.

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