Woody and fresh, Eucalyptus essential oils help relieve mental exhaustion and promote concentration. It’s one of the oldest natural remedies used by natives in Australia to soothe physical and emotional discomfort. Diffusing it while you’re working will keep you focussed, while also ensuring you stay relaxed. Aromatherapists suggest Eucalyptus to support a healthy respiratory system and soothe sore muscles after exercise. Like Peppermint, it’s also a good bug repellent.