Allergic to pollen, as well as pregnant women are best not to eat, to eat also need to consult a professional doctor's advice before taking. Pine pollen is purely natural. It has been proved by scientific research and practice that long-term use of pine pollen has no side effects. But be sure to choose some well-known brands, like Haijiya pine pollen, quality is more guaranteed. Don't be cheap to buy those poor quality pine pollen oh.