Propolis has been used by humans for health and healing since ancient times and is widely regarded for its anti-bacterial, anti-fungal and anti-inflammatory properties. This resinous substance is gathered and used by honeybees to disinfect, waterproof, and protect the hive. Commonly referred to as ‘bee glue’, bees use this sticky glue-like substance to seal up cracks and crevices and keep out intruders.