Abstract
In this study, an investigation based on an effectiveness study trial without special limitations was carried out regarding how 14 days’ continuous soup intake would change the mood of the participants and their salivary cortisol levels between awakening and evening. The participants consisted of 16 healthy workers who agreed to participate in the experiment. The participants led their normal daily lives without consuming soup for the first 14 days (controlled condition), and then consumed their chosen soup once a day, at approximately 3 p.m., for the next 14 days (soup condition). Their salivary cortisol levels were measured when they woke up in the morning (awakening) and at 5 p.m. on the last day of each condition, while their mood was evaluated by questionnaire at 5 p.m. every day. The irritation-anger score of the soup condition was significantly lower than that of the controlled condition, and the difference in the salivary cortisol level between awakening and evening in the soup condition was significantly higher compared with the controlled condition. As a result, this study suggests that continuous soup intake under conditions of free choice in the afternoon at the workplace may be effective in relieving stress of worker’s body and mind.
Highlights
IntroductionSoup is a general term for liquid food made from meat, seafood and vegetable stock, and it has been empirically known that consuming warm savory soup on a regular basis in daily lives calms the mood and elicits a sense of relief (Midoh, 2011)
Soup is a general term for liquid food made from meat, seafood and vegetable stock, and it has been empirically known that consuming warm savory soup on a regular basis in daily lives calms the mood and elicits a sense of relief (Midoh, 2011).As a result of an experimental study that investigated the psychological change caused by chicken extract, it was reported that the tension-anxiety scale of POMS declined due to chicken soup intake for two weeks (Midoh & Noguchi, 2009)
In this study, based on an effectiveness study trial, we investigated the mood which 14 days’ continuous soup intake would cause on the subjects, along with the difference in the amounts of their cortisol secretion between awakening and evening
Summary
Soup is a general term for liquid food made from meat, seafood and vegetable stock, and it has been empirically known that consuming warm savory soup on a regular basis in daily lives calms the mood and elicits a sense of relief (Midoh, 2011). It was reported that a sense of relief rose soon after consuming corn soup, which was sold at a store (Nagai et al, 2012). These above reports indicated that the soup intake caused some psychological changes, but no investigation on the effects of continuous soup intake in daily lives had been carried out with using any biomarkers to measure those psychobiological changes. In this study, based on an effectiveness study trial, we investigated the mood which 14 days’ continuous soup intake would cause on the subjects, along with the difference in the amounts of their cortisol secretion between awakening and evening. The participants were asked to freely select the type of soup depending on their daily mood and preference, so that their situations would be similar to those of their daily lives
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