Mari

taking your supplements wouldn't hurt and might help, even with the originating problem being sleep-deprivation.

sleep deprivation places additional stress on the body in general. accordingly, your b requirement is probably higher than usual. magnesium alone will not work if there is a deficit in a complementary nutrient.

taking supplements (yours provide the b's and other complementary nutrients) should help you during the day and should improve your sleep quality, when you do sleep.

http://www.boxingscene.com/supplements/9649.php
this article focuses on single vits, but remember, the b vist work together and require other vits/minerals as well. so the multivit is a good integrative solution.

preferably, take the supplements during the daytime - say with lunch meal, not shortly before going to bed.

i wish you the ability to sleep more.

~ waves ~