article_snippet: A compound found in eggs makes people much more generous, new research suggests.
article_snippet: Scientists say that tryptophan, an amino acid found in some foods, can change our behaviour.
article_snippet: In experiments Scientists found that consuming a small portion of tryptophan - the equivalent of that found in three eggs - doubled the sum volunteers gave to charity.
article_snippet: Eggs and other foods such as fish and milk are rich in tryptophan, an amino acid that is converted in the body into the feel-good chemical serotonin.