Looking at the difference that can be made to teens' mood and behaviour if they take a quality multivitamin, including a personal recommendation as to what I believe is the best teen multivitamin. This is particularly important for troubled teens or youth at risk who may have emotional problems such as depression or anxiety and those with behavioural issues like anger, aggression, problems concentrating, hyperactivity and impulsivity. This video explains why and shares the research to back it up.