It has nothing to do with your organs trying to eliminate something but with B vitamin complex natural coloring. Your body only absorbs what it needs and the rest is excreted.
Yea, I know. It bioaccumulates. I was telling you that's the mechanism of action for vitamin retention, not whatever you thought about your body saving some for later.
I got told me quite the opposite, from people with actual medical degrees. That multivitamin supplements aren't all that useful since the body tends to not absorb much of it and excretes it. It's better to get the vitamins from your food.
If vitamins get fully absorbed why is my piss bright green when I take a multivitamin?
Yeah that makes sense, but since the body is a complex system, it _would_ be possible that something like the following is going on. This is fictional, but _could_ be true, if we didn't know otherwise.
Your body prioritizes certain organs and bodily functions over others, depending on the resources that it gets. Who knows, perhaps when the body recognizes that it's not getting enough of a certain vitamin, it will change how it distributes the vitamin throughout the body. Now, because of evolutionary reasons, a function evolved that when the body recognizes the brain is getting too little of a certain vitamin, it takes a larger portion of what _is_ coming in, to make sure that the brain functions properly so it can solve the issue of poor diet, making a cut elsewhere in the body.
Of course, this is utter bullcrap, but it _could_ have been true.
Though, I'm completely with you, this is something I always assumed as well.
In general terms, I agree. Since B vitamins are mostly water-soluble[1], generally it has been assumed that excess would be excreted, and research that suggests that some of them are not so harmless is news.
Why is a multivitamin complex necessary after large doses of B vitamins? I thought that B vitamins are just water-soluble and your body removes the excess.
Ah yeah, I was thinking more about the plant extracts. But your body is probably decent at filtering out the vitamins and minerals it doesn’t need (the water soluble ones, at least, be careful with fat soluble ones like vitamin D).
That sounds like a great way to develop several kinds of vitamin deficiencies (look up Wernicke’s encephalopathy—vitamin B1 deficiency and vitamin B9 and B12 deficiency). Do you supplement any kinds of vitamins with your detox?
>you usually have noticeably different colored urine. That's no coincidence.
Personally the only substance I've noticed cause substantial colour changes is high doses of riboflavin (the infamous neon yellow...).
Several of the vitamin B's are often found in energy drinks and various pre-workout mixes in very high doses as well (e.g. it's not uncommon for pre-workout mixes to trigger niacin-flushes as well as riboflavin-neon color). The motivation seems to be that the potential benefits might be good enough and the risks low enough that it's better to dose high and maximize what is available to the body, even if most ends up being excreted.
Not many other supplements tends to be dosed at such high multiples of RDA's as some of the B-vitamins often does.
Me, I split my "One A Day" type vitamin/mineral pill into two and take one half with breakfast and lunch. I avoid dinner for minerals to give any excess the best chance of getting excreted during the day when I'm pushing a lot more water though my kidneys.
As for your problem ... are you sure that's not just some dye in the pill? I don't know of anything that would be "bright green" that you'd likely be taking.
> I read that in the case of C vitamin, for instance, the body simply doesn't recognise it as C vitamin when it doesn't come directly from fruit. Just ignores it and passes it onto urine.
If it's getting absorbed but excreted, it sounds like you're taking more than enough. Usually absorption is limited by cofactors. Allusions to fruit being better than isolated Vitamin C should be backed up by evidence.
It does get absorbed by the body if it's by itself. The key is that, whether it's in your food or a supplement, your body will not take in more than it needs. So unless you're deficient in a particular vitamin, any extra won't get absorbed, and you'll just pee it out. So supplements are good for people with specific vitamin deficiencies, to make up for that lack, but for anyone without a deficiency, they just give you expensive urine.
In the context of this theory, if what your body is lacking is one of the vitamins you are consuming, and this way of consuming it allows for the body to use it as it needs, the answer would be yes.
Does anyone know if this enzyme is present in B vitamins or produced by the gut biome due to excessive intake of B vitamins (B-2 and B-12 specifically)? In my experience, an excess of B vitamins causes the urine to turn yellow (independent of hydration level) and was curious if this enzyme plays into that at all.
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