Synephrine constricts blood vessels in the nasal passages, reducing swelling and congestion. This action helps to relieve nasal stuffiness and improve breathing.
Synephrine acts as a nasal decongestant by stimulating alpha-adrenergic receptors in the nasal passages. This stimulation causes vasoconstriction, which reduces blood flow to the nasal tissues, thereby decreasing swelling and congestion. This effect helps to open up the nasal passages, easing breathing and relieving the sensation of stuffiness.
Ingredients That Provide This Benefit
Evidence Levels for Ingredients
Synephrine
Evidence: 3/5