#4 Iron
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There’s no doubt that low levels of iron can deplete one’s energy supply and cause fatigue, exhaustion and feelings of general weakness. Iron supplements are sometimes prescribed by doctors, especially for women who may have more difficulty maintaining sufficient levels. For many people, a balanced diet which includes things like whole grains, meat and fish, iron deficiency is usually not a problem, but for those who struggle to maintain proper levels, iron supplements are readily available and quite inexpensive.
