Erowids Ephedra Vault - Erowid takes its goal "documenting the complex relationship between humans and psychoactives", seriously.
Botanical.com on ephedra - Botanical has a large database with (healing) plants and herbs, international news, articles and columns.
Lycaeum on ephedra - Lyceaum has really complete information on a large number of chemical and natural drugs.
TAC Ethnobotanicals on ephedra - TAC offers an overview of rare seeds, herbs and roots.
Mothernature.com on ephedra - Mothernature gathers information about natural health products: a fully complete list.
Guarana.com - Everything about ephedra's energizing equivalent guarana.
Bouncing Bear Botanicals - Order Ma Huang online in the United States.
Azarius smartshop and headshop - Order ephedra-free products online in Europe.
World Nutrition (Ephedra) Diet Pills & Nutritional Supplements.
Geranamine / DMAA - Comprehensive information on geranamine (DMAA).