The raison d'etre of this website is to provide you with hard scientific information which may help you make informed decisions in your quest for health (so far I have blogged concise summaries of over 1,500 scientific studies and have had three books published).

My research is mainly focused on the effects of cholesterol, saturated fat and statin drugs on health. If you know anyone who is worried about their cholesterol levels and heart disease, or has been told to take statin drugs you could send them a link to this website, and to my statin or cholesterol or heart disease books.

David Evans

Independent Health Researcher

Saturday, 26 February 2011

Dietary tryptophan may help in the treatment of ADHD

This paper was published in Acta Psychiatrica Scandinavica Volume 99, Issue 4, pages 300–304, April 1999

Study title and authors:
Circulatory levels of catecholamines, serotonin and lipids in attention deficit hyperactivity disorder
B. Spivak1, Y. Vered, R. Yoran-Hegesh, E. Averbuch, R. Mester, E. Graf, A. Weizman
Research Unit, Ness Ziona Mental Health Center, Nes Ziona, Israel

This study can be accessed at:

Spivak notes that ADHD is frequently complicated by aggressive impulsive behaviour, which is suggested to be related to low serum cholesterol levels.

The study, of boys with ADHD, found that lower levels of blood serotonin, were associated  with higer degrees of hyperactivity, impulsiveness, lack of concentration, and aggressiveness in boys.

Serotonin is manufactured in the body using the amino acid tryptophan. Excellent dietary sources of tryptophan include: turkey, chicken, beef,  fish, milk, eggs and cheese.