Ashwagandha is a well-known medicinal herb. It is classified as an “adaptogen,” meaning that it can help your body manage stress. Additional benefits of this herb include reducing cortisol, increasing brain function, lowering blood sugar levels and helping to fight symptoms of anxiety and depression. Research on this herb has shown that it promotes antioxidant activity known to protect nerve cells from harmful free radicals. Many studies also point to benefits in improved thyroid function, fighting adrenal fatigue, increasing stamina and endurance and providing an immunity boost.