Traditional ceramics add some industrial raw materials to improve the performance of ceramics. Bone porcelain is a kind of ceramics which adds herbivorous animal bone powder (mainly bovine bone powder) to the ceramic matrix. The main component of bone powder is calcium phosphate. Calcium phosphate is a kind of amino acid, a nutrient that human body must supplement, and it is a real healthy ceramics. Traditional ceramics do not contain calcium phosphate. http://www.shenzhenlexinporcelain.com/bone-china-mug/