Echinacea angustifolia

Best for

Catch fewer colds and infections

Not enough research · 300 mg/day · 1 study , n=155

1 papers · 2 claims · 3 outcomes scored · 2 positive

Outcomes

What echinacea angustifolia actually does, by outcome

Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.

Outcome Effect size Evidence Dose Weeks Rank

Catch fewer colds and infections Not enough research

Your immune barriers intercept more viruses before they take hold.

1 RCT n=155 300 mg — #10/17

16049208

trivial

1 RCT n=155

300 mg

—

#10 /17

Ease cold and flu severity Not enough research

When you do get sick, the whole experience hits lighter.

1 RCT n=155 300 mg — #4/17

16049208

trivial

1 RCT n=155

300 mg

—

#4 /17

Outcome	Effect	Evidence	Dose	Weeks	Rank
Catch fewer colds and infections Not enough research	trivial	1 RCT n=155	300 mg	—	#10/17
Ease cold and flu severity Not enough research	trivial	1 RCT n=155	300 mg	—	#4/17

Risk profile

Adverse events and known drug interactions

Safety events

Gastrointestinal side effects

Sources

1. An evaluation of Echinacea angustifolia in experimental rhinovirus infections. (2005) ↑

Generated August 14, 2026

Echinacea angustifolia

What echinacea angustifolia actually does, by outcome

Adverse events and known drug interactions

More evidence for Echinacea angustifolia

Echinacea

Echinacea purpurea

European Elder / Elderberry (Sambucus nigra)

Quercetin

Vitamin C

Vitamin D (unspecified)

Echinacea angustifolia

More evidence for Echinacea angustifolia

NewEchinacea

NewEchinacea purpurea

NewEuropean Elder / Elderberry (Sambucus nigra)

NewQuercetin

NewVitamin C

NewVitamin D (unspecified)

Echinacea

Echinacea purpurea

European Elder / Elderberry (Sambucus nigra)

Quercetin

Vitamin C

Vitamin D (unspecified)