: If you take nitrates for heart disease, hidden sildenafil can cause a life-threatening drop in blood pressure.
: Contains icariin, which may mimic the effects of ED drugs in animals, but human data is scarce.
The biggest danger is not the herbs themselves, but what isn't on the label.
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: Some small studies suggest it may help with stamina and blood flow.
: Many online products are manufactured in unregulated facilities and may contain heavy metals, pesticides, or even bacteria.
: An amino acid that helps relax blood vessels, though high doses can be risky for those with heart issues.
