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

The vitamin: MegaRed Omega 3 Krill Oil ($14)

Why people take omega-3s: Can help reduce the risk of heart disease, high blood pressure, and cholesterol.

What reviewers are saying: Unlike some heavy omega-3 oils, this doesn't have a fishy odor to it. It has over 900 reviews on Amazon and 4.6 stars. "These have no fishy taste are so much smaller than other typical capsules, making them so much easier to swallow."