PKU Exchange
- Offering a UK food database, exchange calculator, recipes, and articles. Includes a message board.
- http://www.pkuexchange.co.uk

Firstplay Dietary Foods LTD
- Range of low protein food products for adult and child PKU patients on a low phenylalanine diet.
- http://www.promin-pku.com

Genes and Diseases: Phenylketonuria
- Brief genetic information.
- http://www.ncbi.nlm.nih.gov/books/bv.fcgi?call=bv.View..ShowSection&rid=gnd.section.234

Pediatric Oncall
- In-depth look at Phenylketonuria (PKU). Includes symptoms, diagnosing, newborn screening, treatment and follow up.
- http://www.pediatriconcall.com/fordoctor/diseasesandcondition/pku.asp

PKU-Info.org
- Provides general information, plus links to organisations, suppliers and mailing lists. Also includes a forum. [English and German]
- http://www.pku-info.org

Phenylketonuria
- Definition, causes, symptoms and treatments.
- http://www.medhelp.org/lib/pku.htm

Medline Plus: Phenylketonuria
- Definition, causes, symptoms and treatment.
- http://www.nlm.nih.gov/medlineplus/ency/article/001166.htm

National PKU News
- Organisation providing information and news to families and professionals. Includes general information about the condition, dietary advice, research, personal stories and support.
- http://pkunews.org/

Children's PKU Network
- Organisation offering education and direct assistance. Includes details of projects, plus links to food suppliers.
- http://www.pkunetwork.org/