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Botanical

Echinacea

Also known as: Echinacea purpurea, Echinacea angustifolia, Purple coneflower

B
Evidence

Immune-stimulating herb that may reduce cold incidence and duration. Most evidence for E. purpurea preparations.

Primary uses

  • Cold prevention
  • Immune stimulation
  • Upper respiratory infections

How it works

  • Activates macrophages and NK cells
  • Increases phagocytosis
  • Modulates cytokine production
  • May have direct antiviral effects

Dosage

Typical range
300-500mg extract 3x daily, or as directed on product
Timing
At first symptom, continue for 7-10 days
With food
Either way
Duration
Short-term use (2-8 weeks), cycle on/off for prevention
Special populations
Adults, children with pediatric formulations

Forms

  • E. purpurea aerial parts extract
  • E. purpurea root extract
  • Fresh-pressed juice
  • Dried herb/capsules

Safety

Common side effects

  • Rare: GI upset, rash
  • Allergic reactions (daisy family allergy)

Contraindications

  • Autoimmune diseases
  • Ragweed/chrysanthemum allergy
  • Immunosuppressant use

Known interactions

Evidence notes

Mixed but generally positive evidence for colds

Grade B: Some human trials support key claims; further confirmation needed.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.