The labelling on our Propolis Spray says "consult a healthcare practitioner for use beyond one month" just to be extra safe! Like most powerful natural supplements, we are required to have this on the label. If you have a health issue that persists beyond 1 month, we highly recommend consulting a healthcare practitioner.
That being said, we have many customers (including all of our team members) who have been taking Propolis Spray regularly and well beyond the 30-day marker. For most people, there is no harm from taking bee propolis for extended periods of time.