Advertisement: Ways to Reduce Cortisol Naturally. 1. Use cortisol reduction supplements: Holy Basil, Golden Root, magnolia, vitamin C, phosphatidylserine, glutamine, and rhodiola rosea. Also vitamin B5 and folic acid can help lower cortisol levels. They can be found in foods like fish, beans, whole grains, and sunflower seeds. 2. Eat at regular intervals throughout the day: Avoid skipping meals, as this will create a cortisol release.