Research suggests that pine bark extract (Pycnogenol) shows meaningful promise as a complementary approach for ADHD symptom support, with several randomized controlled trials reporting reductions in hyperactivity, inattention, and impulsivity in children, alongside improvements in oxidative stress markers and catecholamine levels. A 2024 network meta-analysis ranked Pycnogenol among the more effective antioxidant-based interventions for ADHD, and multiple systematic reviews and narrative reviews identify it as one of the better-supported herbal options in this space, often alongside Bacopa monnieri. That said, the overall body of rigorous evidence remains modest in scale — the RCTs are relatively small and short in duration, and several earlier reviews characterized the evidence as mixed or preliminary, calling for larger and longer trials before firm conclusions can be drawn. Studies indicate the research direction is generally positive, but the evidence base is not yet strong enough to position Pycnogenol as a clinically established ADHD treatment, and it is most accurately described as a supplement with encouraging but still-developing support.
Citations from PubMed and preprint sources. Match score (0-100) reflects automated search ranking, not clinical appraisal.
| Title | Type | Year | Direction | Match |
|---|---|---|---|---|
| Treatment of ADHD with French maritime pine bark extract, Pycnogenol. | RCT | 2006 | Supports | 97 |
| Urinary catecholamines in children with attention deficit hyperactivity disor... | RCT | 2007 | Supports | 93 |
| Complementary effects of pine bark extract supplementation on inattention, im... | RCT | 2021 | Supports | 92 |
| The effect of polyphenolic extract from pine bark, Pycnogenol on the level of... | RCT | 2006 | Supports | 90 |
| Safety and efficacy of antioxidant therapy in children and adolescents with a... | Meta-analysis | 2024 | Supports | 88 |
| Enhancing pediatric attention-deficit hyperactivity disorder treatment: explo... | Other | 2024 | Supports | 85 |
| Herbal medicines in the treatment of children and adolescents with attention-... | Review | 2023 | Supports | 85 |
| Neurodevelopmental disorders and gut-brain interactions: exploring the therap... | Review | 2025 | Supports | 80 |
| Herbal medicines in children with attention deficit hyperactivity disorder (A... | Systematic review | 2017 | Supports | 80 |
| Nutrient supplementation approaches in the treatment of ADHD. | Review | 2009 | Mixed | 78 |
| Nutritional and dietary influences on attention deficit hyperactivity disorder. | Review | 2008 | Mixed | 78 |
| Phytotherapy for Attention Deficit Hyperactivity Disorder (ADHD): A Systemati... | Systematic review | 2022 | Supports | 75 |
| Psychiatric Disorders and Polyphenols: Can They Be Helpful in Therapy? | Review | 2015 | Supports | 75 |
| [Alternative agents used in ADHD]. | Review | 2009 | Mixed | 75 |
| Rationale for Dietary Antioxidant Treatment of ADHD. | Review | 2018 | Supports | 72 |
| Pine bark (Pinus spp.) extract for treating chronic disorders. | Meta-analysis | 2020 | Supports | 70 |
| Pycnogenol(®) for the treatment of chronic disorders. | Meta-analysis | 2012 | Supports | 65 |
| Pycnogenol® (extract of French maritime pine bark) for the treatment of chron... | Systematic review | 2012 | Supports | 65 |
| Clinically Significant Drug-Drug Interactions with Agents for Attention-Defic... | Review | 2019 | Neutral | 60 |