http://mens-en-gezondheid.infonu.nl/alternatief/11157-afweersysteem-verhogen-met-echinacea-purpurea.html

Afweersysteem verhogen met Echinacea purpurea

http://www.annetanne.be/kruidenklets/2007/04/06/
echinacea-purpurea-en-immuniteitsproblemen

Echinacea purpurea en immuniteitsproblemen

http://www.umm.edu/altmed/articles/echinacea-000239.htm

People use echinacea to shorten the duration of the common cold and flu and reduce symptoms, such as sore throat (pharyngitis), cough, and fever. Many herbalists also recommend echinacea to help boost the immune system and help the body fight infections.

http://nccam.nih.gov/health/echinacea/ataglance.htm

Echinacea is believed to stimulate the immune system to help fight infections.

http://www.umm.edu/altmed/articles/echinacea-000239.htm

Many herbalists also recommend echinacea to help boost the immune system and help the body fight infections.

http://www.cfsinfo.be/Documentatie/Orthomoleculair/
Voedingsupplementen/
Voedingssuppl%20ementen/echinacea_monograph.pdf

Echninacea monografie