Anita mentioned the XS energy drink... it works. I went from a size 16 back to an 8 with the help of the XS drink. It not only provides a healthy way to get energy but also a helps you to reach and teach your body to find its natural metabolism again. As far as vitamins go and what they do;
Vitamin B6 is helpful in amino acid metabolism.
Vitamin B12 is the “energy” vitamin, people feel more energetic taking it. It is involved with normal cellular metabolism and participates with folic acid, choline, methionine in the transfer of methyl groups for the synthesis of nucleic acids.
Also the company came out with an energy & vitamin XS beverage called XS Gold. It includes the Acai berry. Follow up Anita if you want more information - her products come with a buy it - try it - don't like it? get a refund guarantee. Trust me you'll like the flavors she offers and the results... No sugar, No Carbs, No energy drop offs. Best wishes for you weight loss goals!