COMT inhibitors are compounds that inhibit the enzyme catechol-O-methyltransferase, which breaks down catecholamines (dopamine, norepinephrine, epinephrine). Inhibiting COMT slows catecholamine degradation, increasing their availability and duration of action, particularly important for individuals with high-activity COMT polymorphisms.
COMT adds a methyl group to catecholamines, inactivating them. COMT inhibitors block this methylation reaction, slowing the breakdown of dopamine, norepinephrine, and epinephrine. Natural COMT inhibitors include EGCG (green tea), epicatechins (chocolate), luteolin, fisetin, rutin, and quercetin. Pharmaceutical COMT inhibitors like entacapone prevent peripheral L-DOPA breakdown in Parkinson's treatment. By slowing catecholamine degradation, these compounds extend dopamine signaling, improve executive function, and enhance stress resilience.
For patients with GG (high-activity) COMT polymorphism who rapidly degrade dopamine, COMT inhibitors provide therapeutic support for anhedonia, executive dysfunction, and poor stress recovery. Natural COMT inhibitors (green tea EGCG, cocoa epicatechins, flavonoids) can be safely combined with dopamine precursors (L-tyrosine, Mucuna pruriens L-DOPA) for synergistic effect. This protocol addresses 'worrier' phenotype symptoms by prolonging dopamine availability without excessive stimulation.
- Inhibit COMT enzyme that breaks down catecholamines
- Slow degradation of dopamine, norepinephrine, and epinephrine
- Natural inhibitors: EGCG/green tea, epicatechins/chocolate, luteolin, fisetin, rutin, quercetin
- Pharmaceutical: entacapone (used with L-DOPA in Parkinson's disease)
- Particularly beneficial for GG (high-activity) COMT polymorphism
- Extend dopamine signaling and improve executive function
- Can be combined with dopamine precursors for synergistic effect
- Help address anhedonia, executive dysfunction, and stress recovery
- COMT — COMT inhibitors block this enzyme to slow catecholamine breakdown
- dopamine — COMT inhibitors increase dopamine availability by slowing degradation
- Norepinephrine — COMT breaks down norepinephrine; inhibitors extend its action
- Epinephrine — COMT metabolizes epinephrine; inhibitors prolong its effects
- EGCG — green tea EGCG is potent natural COMT inhibitor
- Epicatechins — chocolate epicatechins inhibit COMT enzyme activity
- luteolin — flavonoid COMT inhibitor found in herbs and vegetables
- fisetin — flavonoid with COMT-inhibiting properties
- rutin — flavonoid glycoside that inhibits COMT
- Quercetin — potent flavonoid COMT inhibitor with wide distribution in plants
- L-DOPA — L-DOPA competes for COMT; inhibitors prevent its peripheral breakdown
- Parkinson's Disease — COMT inhibitors like entacapone maximize central L-DOPA in Parkinson's treatment
- L-tyrosine — can be combined with COMT inhibitors to increase dopamine synthesis and reduce breakdown
- Mucuna pruriens — natural L-DOPA source synergistic with COMT inhibitors
- anhedonia — COMT inhibitors help address anhedonia by prolonging dopamine signaling
- executive function — COMT inhibition improves prefrontal dopamine for executive function
- stress recovery — COMT inhibitors improve stress resilience in GG genotype individuals
- Prefrontal cortex — PFC dopamine levels are particularly sensitive to COMT activity and inhibition
- catecholamines — COMT inhibitors slow breakdown of all catecholamines
- Green tea — source of EGCG, a potent natural COMT inhibitor