What makes 52 Hertz so compelling a study subject is that large baleen whales (like blue and fin) communicate at a frequency range that ends at less than half the 52 Hz range (typically 15 to 25 Hz) which explains why the whaleâs calls go unanswered â no other whale (it seems) can hear it.
Also, many people are eating primarily vegetarian diets, and iron is less available for absorption from vegetable sources. The RDA for iron in a vegetarian man or post-menopausal woman is 14 milligrams per day, compared with 8 milligrams with a mixed diet. Thus, in attempts to make healthy diet changes, many people are ending up with too little iron. The risks of iron deficiency are many. Inadequate iron is one of the major causes of anemia. It can also be seriously harmful to the immune system and lead to both cardiovascular and neurological complications.
According to the Food and Nutrition Information Center of the USDA, the Recommended Dietary Allowance (RDA) for iron is 8 mg per day for males ages 19 and older, 18 mg per day for women between the ages of 19 to 50, and 8 mg per day for women ages 51 and older.