Teenagers struggling with mood swings and irritability could benefit from a simple daily vitamin regimen, according to new research from the University of Canterbury in Christchurch, New Zealand.
While occasional moodiness is common during adolescence, experts note that many teens also face heightened risks of depression and anxiety. Recent data suggest that roughly one in five individuals aged 8 to 25 may experience a probable mental disorder, influenced by hormonal changes, academic pressures, or social stress.
Concern over youth mental health has grown in recent decades, with some experts warning that it has reached a “dangerous phase,” as highlighted in a recent commission published by The Lancet. Traditional interventions such as psychotherapy or medication, however, can be expensive, difficult to access, or poorly tolerated by some teens.
In this eight-week study, researchers recruited 132 adolescents aged 12 to 17 with moderate to severe irritability who were not on medication. Participants were randomly assigned to receive either four daily vitamin pills containing vitamins A, B, C, D, E, and K, or placebo pills. Progress was monitored monthly by a clinical psychologist.
Results showed that teenagers taking the vitamin supplements experienced significant improvements in mood, outperforming the placebo group in measures of irritability and emotional reactivity. The most pronounced effects were observed in teens diagnosed with disruptive mood dysregulation disorder, a condition marked by severe irritability and frequent emotional outbursts. About 64% of this group showed improved symptoms, compared with just 12% of those on placebo.
Parents also reported noticeable improvements in behaviour among children taking vitamins, giving higher ratings than those whose children were in the placebo group.
“The trial provides robust evidence that a simple nutritional approach can meaningfully improve symptoms, including emotional reactivity, conduct difficulties, and even suicidal ideation,” said lead study author Dr Julia J Rucklidge.
The findings suggest that daily vitamin supplementation could become a low-cost, accessible strategy to support adolescent mental health and reduce irritability in this vulnerable age group.
