Institute for Functional Medicine: 
An organization of physicians and other health practitioners based in Gig Harbor, Washington, dedicated to teaching the principles and practice of functional medicine.

Autism Research Institute
This is a non-profit organization which provides scientifically based information to parents and professionals regarding the biomedical treatment of autism.

Talk About Curing Autism (TACA)
TACA is a US non-profit organization dedicated to educating, empowering and supporting families affected by autism. For families who have just received the autism diagnosis, TACA aims to speed up the cycle time from the autism diagnosis to effective treatments. TACA helps to strengthen the autism community by connecting families and the professionals who can help them, allowing them to share stories and information to help improve the quality of life for people with autism. Their book, Autism Journey Guide Vol. 1 - Early Childhood is particularly helpful, but has to be shipped to a US address if you want to purchase a copy. They do provide advice to Canadian families, even though they have no Canadian chapters.

 Environmental Working Group
This is an American environmental organization that specializes in research and advocacy in the areas of toxic chemicals, farming practices, and corporate responsibility. They provide consumer guides that can help reduce exposure to toxic chemicals in the food supply, in cleaning products, and personal care products.

Dr. Mercola’s Health Website
Although this website has an abundance of health products available for sale, use of this website and its searchable database is free. The database contains health information that is very helpful, much of which is backed up by citations from the peer-reviewed medical literature.

Julia Ross, M.A.:
Based on her own extensive clinical experience as a nutritionally oriented psychologist, Julia Ross’s website and books provide much information on the use of nutrition and amino acids to help balance neurotransmitters and reverse mood disorders.

 The Price Pottenger Nutrition Foundation
This Foundation serves as a guardian for the archives of Dr. Weston Price, as well as those of other great researchers in the field of nutrition and health. It publishes Dr. Price’s book, Nutrition and Physical Degeneration, which is a classic on the relationship between dietary practices and health. The Foundation provides access to modern scientific validation of traditional wisdom on diet, agriculture, life-style and health.

The Weston A. Price Foundation

This is another organization dedicated to publicizing the research of dentist and nutritional thinker Dr. Weston A. Price. It provides dietary advice stemming from his research and supporting the scientific validation of traditional diets.