com, Vitamin C-China Vitamin C Manufacturers & Suppliers - Made in China, Does 'Made in China' matter to <br />supplement consumers. Vitamin D3 in the cholecalciferol form, 4000 IU <br />(Jarrow Formulas Vitamin D3 2500 IU, Carlson Labs <br />Vitamin D 2000 IU ). There are numerous drawbacks of body <br />building supplements and individuals need to be careful when using them.