Publications and Resources. Read the groundbreaking 1977 publication â Phylogenetic structure of the prokaryotic domain: The primary kingdoms ,â by Carl R. Woese and George E. Fox, in which Archaea, the third domain of life, is identified.
Youâre quite right that cod liver oil is a good source of vitamin D. According to the National Institutes of Health, it gives you 1,360 IU per tablespoon (I now recommend 2,000 IU daily). However, at least some kinds of cod liver oil provide as much as 13,500 IU of vitamin A, and thatâs way too much. The Upper Limit of vitamin A set by the Food and Nutrition Board of the National Academy of Sciences is 10,000 IU per day.
High-vitamin cod liver oil (discussed further in the product recommendations section) contains between 70 and 360 mg of DHA. Liver from land animals does not appear to contain significant quantities of DHA, but it probably does when the animals are fed grass, which is higher in omega-3 fatty acids than grain.y Chris Masterjohn. Liver and cod liver oil are nutrient-packed super-food supplements that can help boost energy, libido, muscle growth, brain power, and general health. They are abundant sources of nutrients difficult to obtain elsewhere, such as vitamin A, arachidonic acid, DHA, and the B vitamins.