The smaller the Brussels sprout, the more tender and sweet it is (go for larger ones if you want a more cabbage-like flavor). Look for a vibrant green color and whole, intact sprouts without a lot of spots that are nice and firm. Once you get them home, store in a plastic bag in the refrigerator for up to three days.
Taking vitamin supplements will boost your energy level only if you are deficient in them. In particular, our bodies need B vitamins to release the energy in foods. The family of B vitamins includes B1, B2, B3, B5, B6, B7, B12 and folic acid.
1 The vitamin also works in conjunction with other B vitamins to increase the body's efficiency when producing energy.  B5 (Pantothenic Acid): Vitamin B5 is responsible not only for energy conjunction along with the other B vitamins, but also for strengthening the body's immune system.