Echinacea angustifolia root extract packs more alkylamides than its E. Purpurea cousin. People reach for this standardized concentrate at the first hint of a cold or upper respiratory issue. Short courses lasting one to two weeks are the norm. Many cycle it to keep the response sharp.
The body absorbs this extract faster than whole-herb powders. Capsules and liquid tinctures both work. Start right when symptoms appear.