OmManiPadmeOmelet said:Quoted message said:COMMENT:
As noted, you're seeing a metabolite of B2, which is yellow. Yes, this
is a good index of how fast all the you take vitamins hit your blood
stream, and how fast the excess of those that are water-soluble get
dumped overboard by the kidneys, when they hit the blood in large
amounts.
That's how fast ALL nutrients in a meal are assimilated, sorted,
metabolized, stored and otherwise dealt with, also. Pretty fast. 6-8
hours, and it's over with.
SBH
And this is WHY B vitamins need to be taken daily......
--
Om.
Well, they don't. And neither does vitamin C. Just because your body
dumps excess over stored amounts fast, doesn't mean it dumps the amount
IN your stores just as fast. That's a common mistake that's been around
a very long time.
Never make the mistake of thinking something your body needs to
survive, has ONE excretion half-life. In general, that's NEVER going to
be right.
For vitamin C, if you exceed your renal threshhold, the half-life of
the extra is measured in hours. But once you get down to the top of
your storage level the excretion and use half-life goes up to days, and
then (as you eat into your stores) at least 3 weeks.
B vitamins act similarly. The times are different but the principles
are the same. If you got no B vitamins at all beyond one megadose
tablet every couple of weeks, you'd do just fine. Amounts absorbed at
one time (10 to 20 mg) compared with amounts used in a day (a 1 mg or
so), compared with body stores of B vitamins (many 10's of mg for most
of them), gives you the general time scale idea.
SBH