Granero S Propolis Bio 500 mg is a natural supplement in capsule form containing propolis, a substance produced by bees. Propolis has antibacterial, antiviral, and anti-inflammatory properties, making it useful for strengthening the immune system and fighting respiratory infections such as colds, flu, and sinusitis. It can also help relieve cough and nasal congestion symptoms. This product is used as a supplement in the treatment of respiratory conditions and to promote a healthy immune system