A natural supplement of olive leaf extract contains substantial medicinal benefits. Among them are boosting the energy among patients and aiding in the treatment of herpes and other viral conditions, flu and colds, fungal infections, chronic fatigue and allergies. Olive leaf works rapidly in helping to boost the immune system. It is very effective against many strains of virus, bacteria, and fungi. It also has antioxidant properties. Additionally, olive leaf extract has a vasodilator effect on smooth muscle layers of the vascular system, promoting flexible arterial walls and healthy blood flow.