Protocol · Mental Health
Major Depressive Disorder Protocol
Omega-3 Fatty Acids (EPA-dominant) and S-Adenosyl-L-Methionine (SAMe) are the core of this stack, with 4 supporting supplements. Each row gives the amount the protocol lists and the grade our evidence database holds for that supplement in Major Depressive Disorder.
We are re-verifying the studies cited on protocol pages; only confirmed citations are shown.
The stack
6 supplements · 2 graded
| Grade | Supplement | Amount listed | Why it’s in the stack | Evidence on file | Shop |
|---|---|---|---|---|---|
| Primary stackThe core of this protocol | |||||
| Omega-3 Fatty Acids (EPA-dominant) | Amount listed: 2–4 g daily (minimum 60% EPA) | EPA reduces neuroinflammation and modulates serotonin/dopamine signaling | Not graded yet | ||
| S-Adenosyl-L-Methionine (SAMe) | Amount listed: 800–1,600 mg daily | Methyl donor that supports neurotransmitter synthesis and methylation pathways | Not graded yet | ||
| Supporting stackListed as additions to the core | |||||
| Vitamin D3 | Amount listed: 2,000–4,000 IU daily (target 40–60 ng/mL) | VDR in brain areas involved in mood; deficiency strongly associated with depression
| Grade C for Depression Symptoms5 studies · 40 people | ||
| Methylfolate (5-MTHF) | Amount listed: 15 mg daily | Active form of folate; essential for BH4 and monoamine neurotransmitter synthesis | Not graded yet | ||
| Zinc | Amount listed: 25–30 mg daily | Modulates NMDA receptors and BDNF; low levels correlate with treatment resistance | Not graded yet | ||
| Saffron (Crocus sativus) | Amount listed: 30 mg daily (standardized extract) | Crocin and safranal modulate serotonin reuptake and have antioxidant effects
| Grade C for Blood glucose6 studies · 20 people | ||
Shop the evidence-backed picks
Support alongside medical care. These supplements are not a treatment for Major Depressive Disorder. If you are being treated for it, talk to your clinician before adding one: supplements can interact with medicines.
The collection holds the supplements we grade A or B for its theme, in third-party tested products where the catalog has them. It opens in our Fullscript store. You can look through it without signing in; Fullscript asks for a free account to order.
Or shop one supplement
Each opens third-party tested products, matched to the dose above where we can.
- Grade C
- Grade C
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How this protocol works
In plain language
Depression involves imbalances in neurotransmitters (serotonin, dopamine, norepinephrine), neuroinflammation, and reduced brain plasticity. This protocol addresses multiple underlying factors that contribute to depressive symptoms.
- EPA-dominant omega-3s have the strongest evidence for depression of any supplement. Meta-analyses show they're effective as monotherapy or augmentation. EPA specifically reduces brain inflammation and supports neurotransmitter function. Higher EPA ratios work better than DHA-dominant formulas.
- SAMe is a natural compound that the body uses to make neurotransmitters. Multiple studies show it works faster than conventional antidepressants (1-2 weeks vs 4-6 weeks) and can boost the effects of SSRIs.
- Vitamin D deficiency is remarkably common in depression. Vitamin D receptors are present throughout mood-regulating brain regions.
- Methylfolate (L-methylfolate) is the active form of folate that crosses the blood-brain barrier. It's essential for making serotonin, dopamine, and norepinephrine. About 30% of depressed patients have folate-related metabolic issues.
- Zinc deficiency is associated with treatment-resistant depression. It modulates brain plasticity through BDNF.
- Saffron has shown antidepressant effects comparable to fluoxetine in several studies.
Important: These supplements complement but don't replace professional treatment. Severe depression requires medical care.
Expected timeline: SAMe may work within 1-2 weeks; omega-3s and others take 4-8 weeks for full effect.