Tianjin zhongrui pharmaceutical co.

We manufacture apis-vitamin b3 with the strengh of niacin, niacinamide, inositol hexanicotinate, terazosin hcl, etc. for more detaileds about the product, please visit our web linked in the signature. we are iso9001, gmp, coa, fsc, msds certified, free samples are available for testing. if you need any of them, let me know, ill be more than happy to help you in any way i can.