Good evidence base gathered. Now let me read the visualization spec before rendering the ranking.
The evidence is clear enough to build the ranking now — anchored mainly on a 2025 scoping review of 209 clinical trials across 64 supplements, plus newer meta-analyses. Rendering the ranking:
Here's the ranking, scored by strength of clinical evidence for mood benefits — all 30 are available in vegan form (algal oil instead of fish oil, lichen-derived D3, synthetic B12/creatine/SAMe, plant extracts). The biggest evidence gap-filler: a 2025 review of 209 clinical trials found only St John's wort, saffron, probiotics, vitamin D and omega-3s have consistently positive evidence, with most other popular supplements unproven or mixed. (Neuroscience News, Shanghai Archives of Psychiatry, Nutraceuticals World)
30 vegan supplements ranked by mood-boosting evidence (score /100)
1
Saffron extract (30 mg/day)
95
Strong
2
St John's wort
90
Strong (⚠️ drug interactions)
3
Algal omega-3 (EPA-dominant, ≥60% EPA)
85
Strong
4
Multi-strain probiotics
82
Strong
5
Vitamin D3 (lichen-derived)
80
Strong if deficient
6
SAMe
72
Moderate
7
Vitamin B12
70
Deficiency-linked (critical for vegans)
8
L-methylfolate (folate)
68
Moderate
9
Creatine monohydrate (5 g/day)
65
Moderate/emerging
10
Zinc
63
Moderate if deficient
11
Rhodiola rosea
62
Emerging
12
Lavender oil
60
Emerging
13
Magnesium
55
Mixed
14
Lemon balm
54
Emerging
15
L-tryptophan
53
Emerging
16
Ashwagandha
50
Promising (mainly stress/anxiety)
17
Curcumin (turmeric)
48
Mixed
18
Iron
46
Deficiency-linked
19
NAC
45
Limited
20
Chamomile
44
Limited
21
L-theanine
43
Limited (calming)
22
5-HTP
42
Limited (⚠️ serotonin syndrome risk)
23
Vitamin B6
38
Indirect (serotonin/GABA cofactor)
24
L-tyrosine
35
Limited (acute stress only)
25
Taurine
32
Very limited
26
Iodine
30
Indirect (thyroid)
27
Melatonin
28
Indirect (via sleep)
28
Spirulina
26
Very limited
29
Panax ginseng
24
Very limited
30
Valerian
22
Indirect (via sleep)
Key points
Top tier: Saffron performed comparably to standard antidepressants in trials at 30 mg/day, and St John's wort has the largest evidence base — but it interacts dangerously with antidepressants, contraceptives, blood thinners and HIV drugs. (Shanghai Archives of Psychiatry, SupplementScore)
Vegan-specific priority: For plant-based diets specifically, B12, algal DHA/EPA, vitamin D, iron, zinc and iodine are the nutrients whose absence most directly flattens mood — supplementing them matters more than any exotic botanical. (Veg.ac)
Deficiency rule: Vitamin D, B12, zinc and iron mostly help when levels are low — a blood test beats guessing, since supplementing already-adequate levels does little. (Blue Peak Wellness, ScienceInsights)
Omega-3 form matters: EPA-dominant formulas (≥60% EPA, ~1–2 g/day) show real antidepressant effects as an adjunct; DHA-dominant ones don't. Algal oil raises blood omega-3 as well as fish oil in head-to-head trials. (Supplement Stack)
Creatine is an emerging signal, with vegans (who get zero dietary creatine) among the likeliest beneficiaries — but the trials are small and split. (Helvy)
⚠️ None of these replaces professional treatment for clinical depression, and stacking serotonergic supplements (St John's wort, SAMe, saffron, 5-HTP) with an SSRI risks serotonin syndrome — check with a pharmacist or doctor first.
Oct 24, 7:23am
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