When taking vitamins and supplements, does it matter if I take them all at once or should I spread it out throughout the day?
Currently I am taking a multivitamin, fish oil, and I recently added vitamin D supplements (D3 to be specific).
My current routine is take each of the three (along with some unrelated medication in pill form) after I eat breakfast each day.
The addition of the Vitamin D supplement has led me to wonder if taking all of these at the same time of the day is the best idea, or if it would be better to take them separately. For example, my multivitamin already has 400 IU of Vitamin D in it, and then I am adding another 1000 IU in the D3 pill.
Is my body capable of ingesting this much of the vitamin (along with everything else in the multivitamin) at the same time, or will some of it be wasted and end up being excreted? Would it be better to take one at morning and one at night?
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You can take all of the listed various vitamins and supplements together. If you're only going to take them once a day, it is more beneficial to take them with your largest meal of the day, and that hopefully being dinner rather than with breakfast. (Source) (Source)
However, it is better to take smaller amounts with each meal than to take a single large dose once a day if at all possible. This way your body will maintain a more constant and stable supply of it's needed vitamins and nutrients.
You need to remember that some vitamins are fat-soluble (dissolve in fat) and some vitamins are water-soluble (dissolve in water). If you have a low-fat meal with your multivitamins, you're going to miss out on all the fat-soluble vitamins and only absorb the water-soluble ones. The reason you're suggested to take your vitamins at your largest meal if you can't take them in multiple phases is because your largest meal is the most likely to be well-rounded for more full absorption of the vitamins.
There are subtleties with different supplements. e.g. I take a lot (45 mg) of zinc daily. Taking so much zinc means I have to take copper at a different tine of day since zinc can inhibit absorption of copper. Also zinc can give a stimulant effect, so it is best not taken at night. Horses for courses.
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