Liaoyang Tengyuan Food Additive Factory was established up in2008.Our company, Asia Manufacturing ，located in Liaoning Province.We can supply Zinc gluconate,Ferrous gluconate,Copper gluconate,Lithium gluconate,Cobalt gluconate.Magnesium gluconate,Manganese gluconate and others gluconate TEL:86-419-5807666 FAX:86-419-5117559 E-MAIL:SALES@LYTY369.COM