afraidofsurgery said:
One last thing - I am skeptical about many common brands of multi-vitamins' ability to dissolve and be absorbed since they're coated, so I usually go w/ capsules or tabs from a health food store, Trader Joe's, or other brands where I can see they're not coated. Might be paranoid but if I'm spending the money, I at least want the vitamins to reach my bloodstream.
This is from Scientific American:
http://www.sciam.com/askexpert_question.cfm?articleID=000DE2DA-7556-1C71-9EB7809EC588F2D7&catID=3
For absorption to occur, a pill must dissolve and disintegrate. So when shopping for supplements, look for the USP symbol. This symbol indicates that the U.S. Pharmacopeia, an independent testing organization, has tested the supplement to make sure it will dissolve in your stomach. The absorption of nutrients in pill form is not well studied, but if they dissolve in the stomach, they are probably well absorbed.
More about dissolving vitamin pills:
http://www.supplementquality.com/news/multi_vitamins_minerals.html#acidtest
Does your multi-vitamin dissolve properly?
Some manufacturers claim that many brands of vitamin tablets are so hard that they go through the body undissolved, and quote nurses who find vitamin pills in the bedpans of their patients. While this can happen, here's a simple "acid test" you can apply to find out if your multi?or any other pill!?dissolves properly:
1. Place approximately one cup of white vinegar in a small bowl and warm it to 98 degrees or so by placing it inside a larger bowl of water that you "top up" several times with warm water from the tap. (The goal is to keep the vinegar reasonably close to 98 degrees for half an hour.)
2. Drop your multi-vitamin (or other pill) into the vinegar, and jostle it about every five minutes or so by gently shaking or swirling the cup. While you can also stir the mix with a wooden stick or toothpick, be careful not to touch the tablet itself.
3. The tablet should dissolve within 30 minutes. (This is the USP standard for all pharmaceutical tablets.) If it doesn't dissolve within a full hour, it's not doing you much good. Get another brand!
Cris