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What is the safe daily dose intake of Vitamin B Complex?

I purchased a Vitamin B complex supplements from Holland and Barrett but don't know if the daily intake dose is safe.

On the back label the mentioned %NRV for each separate B vitamin is more than 100%..e.g: vitamin B12 is 1,000%..and so on for others.

I don't know if it is OK to take it everyday for one month.

I know that Vitamin B Complex are good in general. I got it to stop feeling always tired and to help in my serotonin levels in a way but I'm a bit skeptical about the dose and I don't want to have side effects.

Please if anyone knows any info I would appreciate your input.


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Thanks for your help!

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