Howei offers a wide range of fat- and water-soluble vitamins for various chromatographic, mass spectrometric, and other analytical applications.
Howei's standards can be used for quality control analysis of various vitamin-related dietary supplements, fortified foods, cosmetics, and pharmaceutical preparations, or for diagnostic testing of vitamin deficiencies. H&W's vitamin reference standards product line includes reference materials in solution form, specifically designed to minimize degradation and extend shelf life.