Every time you eat, you're creating the foundation and tissue that make up the actual shape and structure of your body - and every time you exercise, you're simply putting the finishing touches on the physique you've created with what you put into your mouth.
We give a lot of focus to the macronutrients (carbs, protein and healthy fats) we need to survive and thrive, but remember you also need the MICROnutrients from greens and plants to create essential body, brain, and hormone functions, too. Don't pay so much attention to how you treat your physical body that you ignore the rest of your needs.
So many people walk around with nutrient deficiencies masquerading as cravings, that could be resolved by eating real foods and rotating their greens. Just pay attention to how you're feeling. Your body will tell you what it needs.
Taking a multivitamin isn't a magic pill that will give your body everything it needs. Supplements aren't always absorbed as easily as the nutrients in whole foods, but they do help to take care of some of those defeciencies.
Try as we might, we cannot “spot reduce” fat – and I would caution you from supplements, programs, or cleanses that promise to do so; more often than not, those type of short-term strategies can cause far-reaching damage to your body. Slow, steady, and consistent is ALWAYS a better bet for sustainable results that last!