Though most famous for devising a theory known as "Gut and Psychology Syndrome" (GAPS) and delivering lectures and publishing works on the topic, this Russian-born physician and nutritionist also explored the relationship between nutrition and heart disease.
After earning master's degrees in nutrition and neurology, she spent five years working as a neurosurgeon. She later opened a nutritional consulting clinic.
Her nutrition-themed books include Gut and Psychology Syndrome: Natural Treatment for Autism, ADHD, Dyslexia, Dyspraxia, Depression and Schizophrenia and Put Your Heart In Your Mouth! - What Really Is Heart Disease And What We Can Do To Prevent And Even Reverse It.
A native of Russia, Campbell-McBride (better known as "Dr. Natasha") later settled in the United Kingdom and traveled all over the world discussing her GAPS theory.
She and Scottish-born health expert Gillian McKeith both published books on the topic of nutrition.
