Used for upper respiratory infections in traditional practice.
TrustedSupp Tier System™ · Tier 3Take as a defined course
Check before you startThis one has documented interactions with medication classes where the consequences are serious. If you take any prescription medicine, run it past a pharmacist before starting.
Evidence strength
48/100Limited
WEAKLIMITEDMODERATESTRONGVERY STRONG
What the evidence supports: reducing upper respiratory symptom severity.
This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.
How long to take it
Short courses at symptom onset.
Who it's actually for
Adults with early respiratory symptoms and no autoimmune condition.
Safe upper limit
Unverified
No formal limit; short courses of standardised extract
Can cause allergic reactions and, rarely, liver effects. Avoid in pregnancy.