Signs that you may be low in magnesium include anxiety, low resilience to stress, poor disturbed nights, fatigue, restless legs, eye twitches, time of the month, muscular tension and loss of motivation and energy. Magnesium is an essential mineral needed for over 300 processes in the body including energy production, muscle and nerve function as well as the structure of bones and teeth. This powerful mineral is also proven to aid relaxation and contribute to a reduction in stress and fatigue. Magnesium may be depleted in the body by a diet low in wholegrains, vegetables, nuts and seeds and a high intake of sugar and refined foods.