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.
Women on oral contraceptives lose less blood during menstruation and therefore lose less iron. According to the National Institutes of Health, females aged 9 to 13 need 8 mg iron per day, ages 14 to 18 need 15 mg/day, ages 19 to 50 need 18 mg/day and females older than 51 years need 8 mg/day.