A traditional heart tonic studied in mild heart failure — it interacts with several heart medications.
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
35/100Limited
WEAKLIMITEDMODERATESTRONGVERY STRONG
What the evidence supports: exercise tolerance and symptoms in mild heart failure in older trials.
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
Only with cardiology oversight if you have heart disease.
Who it's actually for
People with heart conditions should only use it with their cardiologist's agreement.
Safe upper limit
Unverified
No formal upper limit; 160–900 mg standardised extract daily in trials
Generally well tolerated. It can add to the effects of blood pressure medication, nitrates, and digoxin — which matters because the people most likely to use it are often on those drugs.