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

Wednesday, 21 April 2010

Monosodium Glutamate (MSG) can provoke asthma

This post includes a summary of a paper published in the Journal of Allergy and Clinical Immunology Volume 80, Issue 4, October 1987, Pages 530-537

Study title and authors:
Monosodium -glutamate-induced asthma
Excitotoxins: The Taste That Kills
David H. Allen M.B., Ph.D., John Delohery M.B. and Gary Baker M.B., B.Sc.
From the Department of Thoracic Medicine, Royal North Shore Hospital, Sydney, Australia

This paper can be accessed at:

This study investigated the asthma-provoking potential of the widely used flavor enhancer, monosodium L-glutamate (MSG). The study was a single-blind, placebo-controlled trial and included 32 subjects with asthma, a number of whom suffered severe asthma after Chinese restaurant meals or similarly spiced meals. The subjects received an additive-free diet for five days before receiving increasing doses of MSG from 0.5 gm to 5.0 gm.

The study found:
(a) Seven subjects developed asthma and symptoms of the Chinese restaurant syndrome one to two hours after ingestion of MSG.
(b) Six subjects did not develop symptoms of Chinese restaurant syndrome, and their asthma developed 6 to 12 hours after ingestion of MSG.

Allen concluded: "These challenge studies confirm that MSG can provoke asthma. The reaction to MSG is dose dependent and may be delayed up to 12 hours, making recognition difficult for both patient and physician".