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

The vitamin: Garden of Life Probiotics Supplement for Women ($28)

Why people take probiotics: Helps support a healthy gut, digestive track, and immune system.

What reviewers are saying: Probiotics come in both pill and liquid form; here's why one reviewer likes this pill. "I finally found probiotics in pill form that actually work. I prefer this over drinking a liquid and my stomach has consistently felt better."