Would going a week without taking a vitamin B complex deplete my stores of vitamin B?

I ate potatoes during my cruiser ship every day for the vitamin B6 and I slept better then a newborn baby

When I returned to Canada I found I had difficulty taking afternoon naps and very low energy until taking nutritional yeast.

I know vitamin B6 helps you sleep and I know I get tired if I don't take enough vitamin B

Would going a week without taking a vitamin B complex deplete my stores of vitamin B?
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