It’s not unusual to feel nauseous when the weather gets really hot. It happens when our body is trying to regulate our core temperature. But you can cut that queasy feeling by sniffing some lemon essential oil or a fresh cut lemon. Stanford University researchers say that when our body struggles to keep our core temperature lower than the temperature outside, it can over-stimulate the nerves in the area of the brain linked to nausea. But taking 6 slow, deep whiffs of lemon essential oil can calm those nerves… and make our stomach feel calmer in as little as a minute.