A research group at University of Shizuoka (Japan) conducted a study to evaluate the effects of NKCP. They published a research paper titled “Effects of products containing Bacillus subtilis var. natto on healthy subjects with neck and shoulder stiffness, a double-blind, placebo-controlled, randomized crossover study”.

This study was published in the “Biological and Pharmaceutical Bulletin, Vol. 41, No.4 (2018)”.