Which condition do you intend to treat by taking multivitamins?
Have you looked at randomized controlled studies and found that they support your idea that taking MVs has a positive effect on that condition?
Have you got your bloodwork done? Did the doctor then suggest that based on your situation MVs are the right approach? I never have heard of such a thing happening.
So yeah, TW and MVs are similar. Both appeal to people who think "Hey, why do the work and figure things out and act appropriately? I can just swallow this magic pill!".