Deficiency and toxicity: There is little information on these areas, especially for toxicity. Deficiency problems are under investigation. Results of studies on animals suggest that silicon may be essential in humans. Decreased growth and deficient bone and tooth structure were found in rats with silicon-deficient diets. Silicon deficiency may increase atherosclerosis and heart disease; however, or it may not be a cause and effect relationship, but rather a result or association of these diseases. It would seem that the essential strength and stability this mineral provides to the tissues should give them protection from disease. Other research reveals that silicon levels affect physical endurance, with low tissue levels correlating with lowered stamina.

Requirements: There is no RDA for silicon since it is not considered essential. The average diet provides about 1-1.5 grams of this mineral, but eating a diet high in processed foods and avoiding the basic vegetable and grain foods may diminish our intake of silicon. To get extra silicon, eat more whole grains and fresh vegetables or use herbs, such as horsetail, or alfalfa or comfrey tablets.