Limited evidenceBrain & cognition

ADHD Support Formulas

Combinations of omega-3s, zinc and calming herbs sold as nutritional support for attention. The individual nutrients produce small effects at best, and the blends themselves have not been trialled.

Evidence last reviewed: August 2026

What the science says

Omega-3 effects on core ADHD symptoms are small Moderate evidence
A meta-analysis of randomized controlled trials found omega-3 supplementation produced only small improvements in ADHD core symptoms, far below what stimulant medication achieves. Effects were most visible on parent-rated inattention.
Zinc may help mainly where intake is low Limited evidence
A dose-response systematic review and meta-analysis of randomized trials in children with ADHD found modest symptom improvement with zinc, largely in studies from regions with widespread zinc deficiency. It is not established as a benefit for well-nourished children.
Herbal components are largely untested Limited evidence
Calming herbs commonly added to these blends have no randomized evidence in ADHD, and no trial has tested a commercial multi-ingredient ADHD formula as sold.

Dosage & safety

Studied doseTrial doses: omega-3 providing roughly 500–1,000 mg/day combined EPA+DHA; zinc 15–30 mg/day elemental for children in the studies, which is at or above the upper intake for younger ages.

SafetyLong-term zinc above the upper limit causes copper deficiency and anaemia; dose by age. Fish oil may cause reflux and adds a small bleeding risk. These products are not a substitute for the assessment and treatment of ADHD — discuss with the prescribing clinician before adding anything.

Scientific references

Omega-3 Polyunsaturated Fatty Acids for Core Symptoms of Attention-Deficit/Hyperactivity Disorder: A Meta-Analysis of Randomized Controlled Trials
Liu TH, Wu JY, Huang PY — J Clin Psychiatry, 2023
The effect of zinc supplementation in children with attention deficit hyperactivity disorder: A systematic review and dose-response meta‑analysis of randomized clinical trials
Talebi S, Miraghajani M, Ghavami A — Crit Rev Food Sci Nutr, 2022

Where to buy

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