The Impact of Purple-Flesh Potato (Solanum tuberosum L.) cv. “Shadow Queen” on Minor Health Complaints in Healthy Adults: A Randomized,Double-Blind,Placebo-Controlled Study |
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| Authors: | Mari Maeda-Yamamoto Osamu Honmou Masanori Sasaki Akane Haseda Hiroyo Kagami-Katsuyama Toshihiko Shoji Ai Namioka Takahiro Namioka Hirotoshi Magota Shinichi Oka Yuko Kataoka-Sasaki Ryou Ukai Mitsuhiro Takemura Jun Nishihira |
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| Affiliation: | 1.Food Research Institute, National Agriculture and Food Research Organization (NARO), Tsukuba 305-8642, Japan;2.Department of Neural Regenerative Medicine, Institute for Frontier Medical Sciences, School of Medicine, Sapporo Medical University, Sapporo 060-8556, Japan; (O.H.); (M.S.); (A.N.); (T.N.); (H.M.); (S.O.); (Y.K.-S.); (R.U.); (M.T.);3.Department of Medical Management and Informatics, Hokkaido Information University, Ebetsu 069-0832, Japan; (A.H.); (H.K.-K.); (J.N.) |
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| Abstract: | ![]()
The purple-flesh potato (Solanum tuberosum L.) cultivar “Shadow Queen” (SQ) naturally contains anthocyanins. This randomized, double-blind, placebo-controlled study determines whether ingesting purple potatoes increases the number of mesenchymal stem cells (MSC) and improves stress response, a minor health complaint in healthy adults (registration number: UMIN000038876). A total of 15 healthy subjects (ages: 50–70 years) with minor health complaints were randomly assigned to one of two groups. For 8 weeks, the placebo group received placebo potatoes cv. “Haruka” and the test group received test potato cv. SQ containing 45 mg anthocyanin. The MSC count and several stress responses were analyzed at weeks 0 and 8 of the intake periods. The ingestion of a SQ potato did not affect the MSC count but markedly improved psychological stress response, irritability, and depression as minor health complaints compared with “Haruka”. No adverse effects were noted. Hence, an 8-week intake of SQ could improve stress responses. |
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| Keywords: | purple-fresh potato cv. “ Shadow Queen” , anthocyanins, improvement of minor health complaints, reducing the effect of the stress response, the brief job stress questionnaire |
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