David Alexander Coory is a 77 year old natural health and nutrition researcher, based in Tauranga, New Zealand. He is the researcher and author of the top selling book ‘Stay Healthy by Supplying What’s Lacking in Your Diet’, which has sold around 100,000 copies within New Zealand and is currently in its 11th edition. His latest book, in the process of being published (about May 2024) is ‘Cure ADHD and Allergies with the Feingold Diet. This book is an account of the findings of Brenda Sampson who ran the ‘Wellington Hyperactivity Association’ for 20 years, using the world-renown Feingold diet. This diet was developed by pediatrician and allergy specialist, Dr. Benjamin Feingold and is used throughout the world with great effectiveness. The book contains numerous success stories, shared by parents who have used this diet with miraculous results within their families, both children and adults and shares practical ways to implement the diet.