Sue's Blog

NOT all in your head!


For failsafers with fragrance sensitivity, multiple chemical sensitivity, chronic fatigue and/or fibromyalgia, there is very good news.

An observational study from McMaster University in Canada has shown that neuroplasticity-based brain retraining can produce significant improvement in these symptoms.

“Neuroplasticity-based treatment for fibromyalgia, chronic fatigue and multiple chemical sensitivity: feasibility and outcomes” Guenter D et al. (2019)

Researchers studied 102 people who attended a DNRS neuroplasticity-based brain retraining course in 2016. Their symptoms included

  • anxiety-chronic fatigue syndrome (ME/CFS)
  • chronic pain
  • depression
  • fibromyalgia
  • food allergies/sensitivities
  • irritable bowel syndrome (IBS)
  • Lyme disease
  • migraines/headaches
  • multiple chemical sensitivity (MCS)
  • neurological disorders
  • post-traumatic stress disorder (PTSD)

Participants completed assessments at baseline with follow-up at 3, 6 and 12 months.

Quality of life and function improved dramatically over 12 months.


  • Fibromyalgia and chronic fatigue were the most common conditions
  • A significant improvement was seen in the first three months following DNRS
  • After 12 months on average all categories improved
  • Statistically, there is less than 1 in 1000 likelihood these changes happened by chance

"All in your head”?

DNRS is the course I did in 2017 for severe fragrance sensitivity and MCS. After one week, my symptoms had improved dramatically. Five years later, the MCS - including fragrance sensitivity - remains completely gone.

“So it really is all in your head,” said one friend.


When people say that, they mean the condition is imagined.

This is a very real condition due to cross-wiring in the brain’s limbic system - and it can be remedied by brain retraining!!!

Neuroplasticity-based courses may be useful for failsafers on severely restricted diets.  Two long-time failsafers report that a brain retraining course reduced their food intolerance.

One is a closed order nun:

“…As I was down to only 12 food items I thought I had nothing to lose. Since completing the 3 day programme I have been able to eat everything again, and have had no problems with smells either“ - from story [1208]

The other says:

“I can now eat everything except when feeling stressed”

See more

Brain retraining for fragrance sensitivity and MCS – three failsafers report

DNRS Dynamic Neural Retraining System

The Lightning Process 


McMaster University research

Dr Dale Guenter, DNRS research results at NAPCRG conference 2019 (video) – YouTube 18.43min