8 Top-Rated Vitamins That Will Give You a Boost — All From Amazon

The vitamin: Nature Made Vitamin B12 ($8)

Why people take vitamin B12: Helps support cellular energy in the body.

What reviewers are saying: If you're feeling dragged down or tired, give yourself a boost with this energy building vitamin. This couple loved taking them together. "My husband and I take [it] every day and feel like we have so much more energy."