Dr. Willard's - Willard Water Dark XXX Concentrate - 16 oz. (0.473 liter) Dr. Willard'sWillard Water Dark XXX Concentrate is recommended for those who are particularly concerned about their daily trace mineral intake levels.Like the Willard Water Clear, the Dr. Willard'sWillard Water Dark XXX Concentrate also has 19 trace minerals such as iron, manganese, copper, iodine, zinc, calcium, potassium, and selenium and many others that are essential to maintaining optimum health.However, the concentration of these minerals found in the Dr. Willard'sWillard Water Dark XXX Concentrate is much higher than what is found in the Willard Water Clear.The trace minerals found in Dr. Willard'sWillard Water Dark XXX Concentrate play a vital role in many of the body's functions such as aiding in the formation of bones and teeth, regulating the release and use of body energy, acting as a natural antioxidant, and assisting in nerve impulse transmission and muscle contraction. The Dr. Willard'sWillard Water Dark XXX Concentrate also has a strong dose of Dr. Willard's CAW catalyst which aides in nutrient assimilation, removing toxins from the body, and serves as an antioxidant and a free radical scavenger. However, the dose of Dr. Willard's CAW catalyst found in the Dark XXX is significantly lower than what is found in the Willard Water Clear.For this reason, it is recommended that customers use twice as much Dr. Willard'sWillard Water Dark XXX Concentrate when diluting the product. What is Dr. Willard's Water? During a complex and patented chemical process the CAW micelle, an electrical charged colloidal particle that is the core ingredient of Dr. Willard's Water, is created. This CAW micelle causes the formation of "a catalyst that alters the structure of water, making water behave in a manner that heretofore has not been reported in the literature" as stated by Dr. Willard.