B vitamins are important for maintaining good energy levels because they assist in the healthy metabolism of carbohydrates into energy. They also play a vital role in producing neurotransmitters, which carry messages in the brain and regulate mood. A deficiency in B vitamins can lead to tiredness, irritability, anxiety, and depression. Eggs are high in B vitamins, so they're a good food for maintaining high energy levels. It is important to eat the whole egg to get the full benefit. This is because some B vitamins, such as B2 and B3, are found in the whites, while others, such as B5 and B12, are almost entirely contained within the yolk.

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