This combination of vitamins perfectly compliment one another to provide a natual sources of energy and have been shown to reduce tiredness and fatigue. This essential engry bundle includes: Essential Vitamin B12B Vitamins are a group of water soluble vitamins found naturally in unprocessed foods such as meats, whole grains and some fruits and vegetables. They play an essential role in a number of key functions within the body. B Vitamins have been shown to help boost energy production, cognitive function, immune support and the reduction of tiredness and fatigue, amongst many other bodily functions. Essential Vitamin B6Vitamin B6 is a valuable member of the B Vitamin family and is largely known for the role it plays in metabolism, energy production and the maintenance of the nervous system.