Re: Vitamin A supplement Question - MK-4 vs. MK-7

[Guest guest]

> -

>

> > If I was taking this and was also taking Jarrows MK-7 (which is like

> > %107 DV, once a day) and getting plenty of sunshine what would the

> > optimum dosage be?

>

> would be much better equipped to answer that question, but I

> suspect there is no one-size-fits-all answer anyway. It depends on

> your needs and on many different aspects of your current physiological

> state. Jarrow's K2 supplement, though, is pretty poor IMO. First,

> it's MK-7 and not MK-4, and so far it appears that MK-4 is what is

> directly physiologically useful. Second, RDA aside, the dosage is

> ludicrously low -- 90 MICROgrams. IIRC there was a study of Japanese

> women in which they received 45 MILLIgrams a day for several years

> with no adverse effects and plenty of benefits. (I don't remember

> whether they were taking MK-7 or MK-4, but MK-7 is largely turned into

> MK-4 in the body anyway.) And a healthy animal-food-centric diet

> founded on fertile soils would definitely offer much more than 90mcg

> per day. Third, it's a ripoff. A whole bottle of Jarrow MK-7 has

> 5.4mg of K2. iHerb charges $13.17 for that 5.4mg bottle. They charge

> $14.94 for a bottle of 60 5mg capsules (yielding a total of 300mg)

> from Carlson. So the Jarrow K2 costs $2.44/mg while the Carlson costs

> $0.05/mg.

>

> -

>

>