There is a wide range of suggested values for animal RDI's. Most fall in the 5-50 IU per kg of diet the specification relates to amount in feed, because animals are feed specific volumes a day, thus you want your feed to have the right level so animals get enough vitamin E. Therefore we need to transform our RDI into a IU per kg amount.
It is estimated that a person in the Western world has approximately 2kg of food a day, so adult RDI is approximately 10 IU/kg food intake.
Comparing this to specific data we find that this 10 IU/kg food intake is the same as chickens, but less than quails, turkeys (25). Less than fish (30), less than mice (20), rats (30), rabbits (40) and less than a guinea pig (50), but more than a hamster (3).
Non human primates RDI is 50IU/kg. So in a zoo the monkey you are staring at gets 50IU/kg of food, yet you on the outside of the cage is recommended to have 10 IU/kg. This is 5 times less, yet we are very similar genetically, and one would conclude that there might be some similarities between our bodies need for nutrients!
So humans have one of the lowest recommended in takes for vitamin E! If we set the IU to 50 IU/kg like that of monkeys we would have and RDI of approximately 100IU.
Thus we need to suppliment our diet with vitamin E, or radically change our dietry habits.
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