About this item Super Nu-Thera (SNT) is Kirkmanҳ proprietary and most popular multi-vitamin specially formulated for individuals who have certain dietary sensitivities or requirements. It offers high vitamin B-6 and magnesium content. This SNT version comes with pyridoxal 5-phosphate (P-5-P) (a form of vitamin B-6) in easy to swallow caplets. Free of common allergens. Gluten and casein free. Ultra Tested. Super Nu-Thera has been Kirkmanҳ most popular dietary supplement since its inception in 1967. The original Super Nu-Thera was formulated by Kirkman at the urgent request of a researcher, Dr. Bernard Rimland, who wanted a nutritional supplement with high vitamin B-6 and magnesium content that tasted good so children would take the product. The original form of Super Nu-Thera was an orange flavored powdered supplement.