Do omega-3s reduce aggression?

Meta-analyses of randomised trials show a small but consistent reduction in aggression scores with omega-3 supplementation, in both children and adults.

Is L-theanine useful in the moment?

It can take the edge off acute arousal within an hour and does not cause sedation, but it does not address the underlying trigger.

When should I see a clinician?

If anger leads to violence, property damage, or follows a distinct change in personality or mood cycling, seek assessment promptly.

Mood

Limited

Anger Management

Better emotional regulation and control over anger responses.

TL;DR

Anger regulation depends on prefrontal control over limbic reactivity. Magnesium, omega-3 and L-theanine have modest supporting data; behavioural therapy remains the strongest intervention.

Why It Matters

Frequent, poorly controlled anger predicts cardiovascular events, relationship breakdown and workplace harm. It commonly travels with depression, sleep debt, alcohol use and low blood sugar rather than existing in isolation, so screening for those drivers matters more than reaching for a supplement. Persistent explosive anger warrants clinical assessment for intermittent explosive disorder or bipolar spectrum illness.

How to Measure

Use validated self-report scales such as the State-Trait Anger Expression Inventory (STAXI-2) or the Buss-Perry Aggression Questionnaire, repeated monthly. A simple trigger diary logging time of day, sleep the night before, caffeine, alcohol and hunger will usually reveal the pattern faster than any lab test.

Biomarkers

STAXI-2 score

Resting heart rate variability

Serum magnesium/RBC magnesium

Fasting glucose

25-OH vitamin D

Optimization Protocol

Fix sleep first: under 6 hours reliably increases emotional reactivity. Stabilise blood sugar with protein-forward meals. Cut alcohol, which is the single most common modifiable amplifier. Add magnesium glycinate 200-400 mg elemental in the evening, EPA-dominant omega-3 1-2 g/day, and L-theanine 200 mg for acute pre-trigger calming. Pair with CBT-based anger management, which outperforms any supplement.