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Article

Low plasma tryptophan is associated with olfactory function in healthy elderly community dwellers in Japan

Decreased circulating tryptophan (Trp) levels are frequently observed in elderly patients with neurodegenerative disease including Alzheimer’s disease. Trp may serve as a potential biomarker for monitoring dis...

Yusuke Adachi, Yoshiki Shimodaira, Hidehiro Nakamura, Akira Imaizumi… in BMC Geriatrics (2017)