Molybdenum (the element of the chromium groups, atomic no. 42, a chemical symbol Mo) - a trace element involved in the metabolic conversion of carbohydrates and fats and increases the absorption of iron. It is used to treat anaemia. Well affects the mood.. It is a component of many dietary supplements and in foods such as lettuce, cabbage and other leafy green vegetables, whole grains (corn, sunflower, etc.).