Re: Omega 3 and Vit E
---In EquineCushings@..., <threecatfarm@...> wrote :
> Wanted to make the point that the method of delivery in question was not optimal.
I certainly agree with this.
> This may be a better site. Or perhaps you have a better one for us lay people.
There is a huge problem with conversion rules for different forms of vitamin E. Most web sites actually are incorrect. Even Wikipedia is incorrect:
“Vitamin E: 1 IU is the biological equivalent of about 0.667 mg d-alpha-tocopherol (2/3 mg exactly), or of 0.45 mg of dl-alpha-tocopherol acetate.”
The conversion of natural d-alpha-tocopherol is correct, i.e. 1 mg is equal to 1.5 IU.
The synthetic form of vitamin E that is commonly used is dl-alpha-tocopheryl acetate
because this form is more stable. 1 mg of dl-alpha-tocopheryl acetate is equal to 1 IU.
Theoretically, the natural form of d-alpha-tocopherol is 1.5 more potent than synthetical dl-alpha-tocopheryl acetate. However, KER claims that studies show even higher potency for the natural form:
Sweden, July 2008
How do I convert International units (IU) to mcg or mg?