I use a scanner to help determine what a person's bodies preferences are which addresses both physical and emotional. Education is always great, but every individual is different so many times people read and it doesn't help them specifically.

Many people do those questionnaires, only to at the end get you to buy their product. I did one to test it out, and it was not accurate for me, so I'm skeptical. Having said that, I work with natural approaches that support the immune system and so much can be done with education, it's whether they will do it. I know so many with major health issues that refuse to change their diet or take the necessary supplements needed. It's changing habits.

If you wish to go to the edge then the GDV - Gas Discharge Visualisation technology takes you to the leading edge. Developed by Dr Constantine Karotkov in St Petersburg - (I have just seen this referred to in Dr Joe Dispenza's recent book "Becoming Supernatural").
I experienced its use first hand as payment for my review of an integrated health clinic in London 2004! - Quite amazing!

I later trained in its use for life coaching of executives. I recall one client who commented that the data, as presented, was "like being hit round the head with a wet fish!" - The data exposed the hidden aspects of physical, emotional and psychological change.

I believe that this technology and others like it form the basis of prevention and an accelerated transition towards a more 'holistic paradigm'. All forms of health-caring are discovering their niche for the 21st Century!