Protocol · Mental Health
Depression (Major Depressive Disorder) Protocol
Omega-3 Fatty Acids (EPA) and St. John's Wort 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 Depression (Major Depressive Disorder).
We are re-verifying the studies cited on protocol pages; only confirmed citations are shown.
The stack
6 supplements · 6 graded · 3 graded A · 5 confirmed studies
| 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) | Amount listed: 1–2 g EPA daily (EPA-dominant formula, EPA:DHA ratio >2:1) | EPA reduces neuroinflammation, modulates HPA axis, and enhances serotonin receptor sensitivity and neurotransmission
| Grade A for Depression Symptoms14 studies · 204 people | ||
| St. John's Wort | Amount listed: 300 mg 3× daily (standardized to 0.3% hypericin) | Inhibits reuptake of serotonin, dopamine, and norepinephrine; modulates GABA receptors
| Grade A for Depression Symptoms3 studies · 3,064 people | ||
Confirmed studies for St. John's Wort (titles as PubMed lists them) | |||||
| Supporting stackListed as additions to the core | |||||
| SAMe (S-Adenosyl-L-Methionine) | Amount listed: 400–1,600 mg daily (start low, titrate up) | Methyl donor supporting neurotransmitter synthesis and phospholipid methylation in neuronal membranes
| Grade B for Depression Symptoms6 studies · 1,558 people | ||
| Vitamin D | Amount listed: 2,000–5,000 IU daily (target 40–60 ng/mL) | Vitamin D receptors in brain regulate serotonin synthesis; deficiency strongly linked to depression
| Grade B for Combined Anxiety & Depression1 study · 7,534 people | ||
Confirmed studies for Vitamin D (titles as PubMed lists them) | |||||
| Saffron Extract | Amount listed: 30 mg daily (standardized extract) | Crocin and safranal modulate serotonin and dopamine reuptake inhibition with anxiolytic effects
| Grade B for Anxiety Symptoms6 studies · 656 people | ||
Confirmed studies for Saffron Extract (titles as PubMed lists them) | |||||
| Curcumin | Amount listed: 500–1,000 mg daily (enhanced bioavailability form) | Anti-inflammatory effects reduce neuroinflammation; enhances BDNF and modulates monoamine neurotransmitters
| Grade A for Anxiety Symptoms284 people | ||
Confirmed studies for Curcumin (titles as PubMed lists them) | |||||
Shop the evidence-backed picks
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
The 6 supplements in this protocol graded A or B. Each opens third-party tested products, matched to the dose above where we can.
- Grade A
- Grade A
- Grade B
- Grade B
- Grade B
- Grade A
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How this protocol works
In plain language
Depression involves complex changes in brain chemistry, inflammation, and neuroplasticity. While severe depression requires professional treatment, several supplements have strong evidence for improving symptoms, either alone for mild-moderate depression or alongside conventional treatment.
- Omega-3 Fatty Acids (EPA) have robust evidence for depression. The brain is highly enriched in omega-3s, and deficiency is linked to depression. EPA specifically reduces neuroinflammation (increasingly recognized as a factor in depression) and enhances serotonin signaling. Studies show significant benefit, especially with EPA-dominant formulas. The effect is strongest in people already on antidepressants (augmentation).
- St. John's Wort is one of the most studied natural antidepressants. It works similarly to prescription antidepressants by preventing the reuptake of serotonin, dopamine, and norepinephrine. Cochrane reviews show it's as effective as SSRIs for mild-moderate depression with fewer side effects. CRITICAL: Do not combine with prescription antidepressants or many other medications—it has major drug interactions.
- SAMe is a natural compound involved in neurotransmitter synthesis. It's been used in Europe for decades as a prescription antidepressant. SAMe supports the production of serotonin, dopamine, and norepinephrine. It works relatively quickly, often within 1-2 weeks. Also beneficial if taking medications that deplete SAMe.
- Vitamin D deficiency is very common in people with depression, and there's evidence the relationship is causal. Vitamin D receptors in the brain regulate genes involved in serotonin synthesis. Supplementation can improve mood, especially in those who are deficient.
- Saffron has surprisingly strong evidence—multiple studies show it's as effective as fluoxetine (Prozac) for mild-moderate depression. It works on serotonin and dopamine systems. It's expensive but effective.
- Curcumin addresses the inflammatory component of depression. Chronic inflammation is increasingly recognized as a driver of depression in many people. Curcumin also increases BDNF (brain-derived neurotrophic factor), which supports neuroplasticity.
Expected timeline: SAMe may show effects within 1-2 weeks. Saffron and curcumin effects typically appear within 4-6 weeks. Omega-3s require 8+ weeks for full benefit. St. John's Wort takes 4-6 weeks.