Most male fin and blue whales sing at around 17 to 18 hertz, which is too deep for humans to hear, but the 'lonely' whale communicates at 52 hertz. When more recordings were released in the nineties, Dr Watkins studied the 52 hertz whale more closely.
The average person needs to absorb just a small amount of iron each day to stay healthy (around 1 mg for adult males and 1.5 mg for menstruating females). To achieve this, however, we need to consume several times that amount. This is because our bodies absorb only a fraction of the iron contained in the foods we eat.
Learn to Take Iron to Prevent Anemia. Visit your doctor and discuss exactly how much iron you should be taking. Men need about 8 mg per day and women should have at least 18 mg. Pregnant women need close to 30 mg per day and only 8 mg per day while nursing. Examine your diet and be sure that you're eating a few excellent sources of iron.