Vitamin B12 is the most essential vitamin when you are talking about what effects it can have on weight loss. These vitamins are generally found in non-vegetarian food items, therefore most vegetarians are found t be deficient in vitamin B12. The food that contains this vitamin is shellfish, meat, eggs, and dairy products. If you find it difficult to get this vitamin easily in your diet, you can also choose to add a vitamin B12 supplement such as Super MIC B12. These are great, helps burn fat faster, increases energy, and boosts metabolism. Losing weight can be easy, if you take proper care and make certain habits that could be helpful for you such as exercising daily, eliminating processed food, drinking plenty of water, adding protein into the diet, having a good amount of sleep, eating only healthy fats, etc.