American has had lifelong allergies

Every day she has to take allergy medication, she has bad congestion

She got in an Uber and “the Uber driver was a pharmaceutical researcher in his career, and he's like retired, and he just Uber drives for fun, and he was on the team that created Motrin”

He told her that olive leaf extract supplements work super well for helping allergies

She tried it, it worked

“I do have no congestion whatsoever. I'm still kind of sneezy, but I'm not like stuffed up, and that was honestly the worst part. So if you're an allergy, allergy sufferer, give it a try”

This is definitely worth a try and it’s true and backed by science

Olive leaf extract contains key compounds like oleuropein and hydroxytyrosol, which have anti-inflammatory, antioxidant, and mast cell-stabilizing effects

Mast cells release histamine during allergic reactions, and recent studies including 2025 research show Olive leaf extract can reduce histamine release