What vitamins can I give my daughter she has ADHD and over waight?

ADHD overweight. No vitamin can replace a healthy lifestyle, ever. Also, for adhd, avoid industrial sugar. Use natural sweets from fruits that never cause weight excess. Fruits have good nutrients and very little calorie compared weight per weight to industrial sweets [cookies-candies-cakes. ].
Childhood obesity is. Managed by pediatricians. Pediatric cardiologists & endocrinologists help when high blood pressure, which can worsen with stimulants, metabolic syndrome, diabetes &/or high cholesterol/triglycerides complicate it. Stimulants, especially amphetamines, can cause weight loss the 1st 3 mos. Of treatment. This doesn't replace family commitment to healthy diet, exercise, & < 2 hrs./day of tv/game time.