Cognitive Improvement and Safety Assessment of a Dietary Supplement Containing Propolis Extract in Elderly Japanese: A Placebo-Controlled, Randomized, Parallel-Group, Double-Blind...

by Takashi Asama, Toshihito Hiraoka, Akio Ohkuma, Nobuaki Okumura, Ayanori Yamaki, Katsuya Urakami
Published 2021-01-01