Gastrointestinal tract bismuth

Bismuth compounds are considered to be slightly to moderately absorbed via the respiratory and gastrointestinal tracts, depending on their solubility between 0.027 and 0.20%... 

Absorption-precipitation. Many agents may form a larger complex - precipitates with other particles such as metallic ions (aluminum, bismuth, calcium, iron)-while passing via the gastrointestinal tract. 

The daily oral intake of bismuth together with food, beverages, and by inhalation is estimated as 5-20 )xg [6,8]. Bismuth is mainly absorbed from the gastrointestinal tract. Inhalation is unimportant. Absorption by skin with toxic symptoms has been reported [38-40], though normally this route is negligible. Remarkable amounts of bismuth are taken up at therapies. 

Most Bi compounds are soluble in water only to a small extent. Bismuth absorption is poor in the gastrointestinal tract 0.027-0.20% of administered Bi may be absorbed [4,33]. There exists... 

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