Featured Research

from universities, journals, and other organizations

Trust through food

Date:
October 22, 2013
Source:
Leiden, Universiteit
Summary:
People’s trust in others increases after eating food that contains the amino acid tryptophan, found in fish, soya, eggs and spinach.

People’s trust in others increases after eating food that contains the amino acid tryptophan, found in fish, soya, eggs and spinach. Leiden psychologist Lorenza Colzato and her colleagues at the Universities of Leiden and Mόnster published their findings in Psychological Science.

Serotonin

Colzato and her fellow researchers were the first to investigate whether tryptophan, that stimulates the production of serotonin, has a positive effect on mutual trust. It was already known that the neurotransmitter serotonin plays a role in mutual co-operation. 'Mutual trust is an important condition for co-operation’, says Colzato. ‘Society functions in the first place on the basis of mutual trust. After that, such institutions as the courts and the police come into play.'

Trust game

To determine the effect of tryptophan, the researchers gave one group of test persons orange juice with added tryptophan, while a second group was given a placebo. Subsequently, the test persons played a trust game, a task that is often used to measure how much one test person trusts the other. A trustor was given 5 euros and was free to decide how much of that money he would give to a trustee in each round of the game. The trustor would then receive extra money, but only if the trustee gave him enough money in return. The money transferred to the trustee by the trustor served as an indicator of mutual trust.

Inexpensive, efficient and healthy

Test persons gave significantly more money to the other person when they had taken tryptophan, compared to persons who had been administered a neutral placebo. Colazto: ‘These results support the idea that “we are what we eat”: the food one eats has a bearing on one’s state of mind. Food canthus act as a cognitive enhancer that modulates the way one thinks and perceives the physical and social world. In particular, the intake of tryptophan may promote interpersonal trust in inexpensive, efficient, and healthy ways.’


Story Source:

The above story is based on materials provided by Leiden, Universiteit. Note: Materials may be edited for content and length.


Journal Reference:

  1. L. S. Colzato, L. Steenbergen, E. W. de Kwaadsteniet, R. Sellaro, R. Liepelt, B. Hommel. Tryptophan Promotes Interpersonal Trust. Psychological Science, 2013; DOI: 10.1177/0956797613500795

Cite This Page:

Leiden, Universiteit. "Trust through food." ScienceDaily. ScienceDaily, 22 October 2013. <www.sciencedaily.com/releases/2013/10/131022101930.htm>.
Leiden, Universiteit. (2013, October 22). Trust through food. ScienceDaily. Retrieved August 22, 2014 from www.sciencedaily.com/releases/2013/10/131022101930.htm
Leiden, Universiteit. "Trust through food." ScienceDaily. www.sciencedaily.com/releases/2013/10/131022101930.htm (accessed August 22, 2014).

Share This




More Plants & Animals News

Friday, August 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Endangered Red Wolves Face Uncertain Future

Endangered Red Wolves Face Uncertain Future

AP (Aug. 22, 2014) — A federal judge temporarily banned coyote hunting to save endangered red wolves, but local hunters say that the wolf preservation program does more harm than good. Meanwhile federal officials are reviewing its wolf program in North Carolina. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Farm Resurgence Grows With Younger Crowd

Farm Resurgence Grows With Younger Crowd

AP (Aug. 22, 2014) — New England farms are seeing a surge in younger farm hands as the 'buy local' food movement grows across the country. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Drug Used To Treat 'Ebola's Cousin' Shows Promise

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Newsy (Aug. 21, 2014) — An experimental drug used to treat Marburg virus in rhesus monkeys could give new insight into a similar treatment for Ebola. Video provided by Newsy
Powered by NewsLook.com
Terrifying City-Dwelling Spiders Are Bigger And More Fertile

Terrifying City-Dwelling Spiders Are Bigger And More Fertile

Newsy (Aug. 21, 2014) — According to a new study, spiders that live in cities are bigger, fatter and multiply faster. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins