HypoallergenicGluten-FreeDietary Supplement Ultra Tested cGMP A multivitamin with a bioavailable form of B6 to support body functions. Kirkman’s Nu-Thera® products offer condensed potencies of nutrients as compared with Kirkman’s popular Super Nu-Thera® products, which allows the capsules to be a smaller size. This formulation, which includes pyridoxal 5-phosphate (P5P) as part of the vitamin B6 source, is intended for those individuals whose physician has determined that the usual form of vitamin B6 is not being utilized completely.