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Condition

Psoriasis

Psoriasis is a chronic autoimmune condition in which the immune system pushes skin cells to build up too fast, causing red, scaly, inflamed patches. Omega-3 fatty acids and vitamin D have the strongest support among supplements, each with moderate evidence, though reviews of probiotics found mixed results on CRP, a blood marker of inflammation. Most other options rest on limited evidence, small studies, or mouse work, so conclusions stay tentative.

Sources: PMID 39798817; PMID 41156763

Supplements studied
7
Graded outcomes
5
Trials
4
People studied
1,037

Evidence by supplement

  • Strong
  • Moderate
  • Limited
  • Very limited

7 supplements

Probiotics: outcomes studied for Psoriasis
GradeOutcomeEffectSizeStudiesPeopleStudies list
C-Reactive Protein (CRP)

Mixed effect

2 studies400 people
Psoriasis SymptomsImproves (the measure goes down)1 study400 people
Interleukin 6Improves (the measure goes down)400 people
Quality of LifeImproves (the measure goes up)400 people
Tetradecyl Thioacetic Acid: outcomes studied for Psoriasis
GradeOutcomeEffectSizeStudiesPeopleStudies list
Cell Adhesion Factors

Small Decrease

Improves (the measure goes down)Small effect43 people
Total cholesterolImproves (the measure goes down)1 study43 people
TNF-AlphaImproves (the measure goes down)43 people
TriglyceridesImproves (the measure goes down)43 people

Aloe Vera

  • Psoriasis Symptoms
  • Pain
Aloe Vera: outcomes studied for Psoriasis
GradeOutcomeEffectSizeStudiesPeopleStudies list
Psoriasis Symptoms

No effect

NoneNo effect1 study120 people

Studies that measured psoriasis symptoms

Pain

No effect on psoriasis pain

NoneNo effect456 people

Bakuchi

  • Antipsoriatic Activity: improves
Bakuchi: outcomes studied for Psoriasis
GradeOutcomeEffectSizeStudiesPeopleStudies list
Antipsoriatic Activity

Mouse tail model: 75.87% antipsoriatic activity vs 87.94% for tazarot gel; preclinical only

Improves (the measure goes up)Moderate effect

Zinc

  • Psoriasis Symptoms: improves
Zinc: outcomes studied for Psoriasis
GradeOutcomeEffectSizeStudiesPeopleStudies list
Psoriasis SymptomsImproves (the measure goes down)1 study60 people

Studies that measured psoriasis symptoms

Phlebodium aureum

  • Psoriasis Symptoms: improves
Phlebodium aureum: outcomes studied for Psoriasis
GradeOutcomeEffectSizeStudiesPeopleStudies list
Psoriasis SymptomsImproves (the measure goes down)1 study63 people

Studies that measured psoriasis symptoms

Inositol

  • Psoriasis Symptoms: improves
Inositol: outcomes studied for Psoriasis
GradeOutcomeEffectSizeStudiesPeopleStudies list
Psoriasis SymptomsImproves (the measure goes down)1 study15 people

What the published studies found

1 automated reading

Automated reading of the published studies (Decosa evidence engine), for outcomes Dr. Grey has not graded yet. It is not a Dr. Grey grade and does not change one. How it is read

  • Bromelain: psoriasis

    The search of the published studies found none on Bromelain and psoriasis that could be read, so there is no finding to report either way.

    Automated reading of the published studies (Decosa evidence engine), run 30 Sep 2026. It reads abstracts, can miss studies, and a repeat run can differ.

Key findings

  • C-Reactive Protein (CRP)Probiotics
  • Cell Adhesion FactorsTetradecyl Thioacetic AcidImproves (the measure goes down)
  • Psoriasis SymptomsAloe Vera

The Psoriasis Supportive Care protocol

2 primary supplements · 7 supporting supplements

See the full protocol

Shop the evidence-backed picks

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Or shop one supplement

The supplement graded A or B for Psoriasis. Each opens third-party tested products for that supplement.

  • Grade B

We earn from purchases made in our Fullscript store, and links to Fullscript, iHerb or Thorne carry our referral, so we may earn a commission at no extra cost to you. Grades come from the research and never change based on what we earn. Full disclosure

Studies cited

100 studies from PubMed

  1. The effects of probiotic supplementation on cardiometabolic health in patients with prediabetes: a systematic review, meta-analysis, and GRADE assessment.Front Nutr, 2025 · PMID 40959695
  2. Lactococcus lactis strain Plasma activates plasmacytoid dendritic cells and mitigates common cold-like symptoms in healthy adults: a meta-analysis of individual participant data.Front Immunol, 2025 · PMID 41280892
  3. Applications of bakuchiol in dermatology: Systematic review of the literatureJ Eur Acad Dermatol Venereol, 2022 · PMID 36176207
  4. Multidirectional activity of bakuchiol against cellular mechanisms of facial ageing - Experimental evidence for a holistic treatment approachInt J Cosmet Sci, 2022 · PMID 35611396
  5. Probiotics and Immune Health: Current Knowledge and Future PerspectivesFront Immunol, 2022 · PMID 35367345
  6. Probiotics for Irritable Bowel Syndrome: A Systematic Review and Meta-AnalysisNutrients, 2022 · PMID 35185242
  7. Probiotics for Prevention and Treatment of Diarrhea: A Systematic Review and Meta-AnalysisJ Clin Gastroenterol, 2021 · PMID 34065205
  8. Probiotics for the Prevention and Treatment of Depression: A Systematic Review and Meta-AnalysisClin Nutr, 2021 · PMID 33572797
  9. Effects of Probiotics on Metabolic Syndrome: A Systematic Review of Randomized Clinical TrialsNutrients, 2021 · PMID 34205166
  10. Probiotics and Weight Loss: A Systematic Review and Meta-AnalysisObes Rev, 2021 · PMID 33578617
  11. The Gut Microbiome, Probiotics, and Their Impact on Skin Health: A ReviewInt J Mol Sci, 2021 · PMID 34296427
  12. Psoralea corylifolia L: Ethnobotanical, biological, and chemical aspects: A reviewJ Ethnopharmacol, 2020 · PMID 32266824
  13. Corylin, a flavonoid derived from Psoralea Fructus, induces osteoblastic differentiation via estrogen and Wnt/β-catenin signaling pathwaysFASEB J, 2020 · PMID 31965654
  14. Health Benefits of Probiotics: A ReviewISRN Nutr, 2020 · PMID 32110829
  15. Probiotics: Comprehensive Review of Growth Promotion Mechanisms and Action in Food ProductsFront Microbiol, 2020 · PMID 33189627
  16. Probiotics: Classification, Mode of Action and Role in Human NutritionPostepy Hig Med Dosw, 2020 · PMID 32754318
  17. Prospective, randomized, double-blind assessment of topical bakuchiol and retinol for facial photoageingBr J Dermatol, 2019 · PMID 29947134
  18. Safety of Probiotics: A Comprehensive ReviewClin Infect Dis, 2019 · PMID 31256138
  19. Probiotics, Prebiotics and Inflammation: A Review of the ScienceBenef Microbes, 2019 · PMID 31787341
  20. Probiotics and Healthy Ageing: A Systematic Review and Meta-AnalysisMaturitas, 2019 · PMID 30796467
  21. Myo-Inositol in Patients with PCOS: A Systematic Review and Meta-AnalysisReprod Biomed Online, 2018 · PMID 30157465
  22. Myo-Inositol and D-Chiro-Inositol in PCOS Treatment: A Meta-AnalysisEur Rev Med Pharmacol Sci, 2018 · PMID 29386119
  23. Inositol and Insulin Resistance: Mechanisms and Clinical EvidenceBiochimie, 2018 · PMID 30107589
  24. Inositol and Depression: A Systematic ReviewEur Neuropsychopharmacol, 2018 · PMID 30315869
  25. Inositol and PCOS: A Comprehensive Review of Clinical EvidenceGynecol Endocrinol, 2017 · PMID 28983169
  26. Inositol in Anxiety Disorders: A Systematic ReviewJ Affect Disord, 2017 · PMID 28467512
  27. Myo-Inositol in Gestational Diabetes: A Meta-AnalysisDiabetes Res Clin Pract, 2017 · PMID 29215127
  28. Inositol and Fertility: A Comprehensive ReviewEur Rev Med Pharmacol Sci, 2017 · PMID 28631564
  29. Safety and Efficacy of Inositol in Clinical Practice: A ReviewGynecol Endocrinol, 2017 · PMID 29071296
  30. World Gastroenterology Organisation Global Guidelines: Probiotics and PrebioticsJ Clin Gastroenterol, 2017 · PMID 30954979
  31. Probiotics for Human Use: Current Advances and Future PerspectivesNat Rev Gastroenterol Hepatol, 2017 · PMID 28639578
  32. Inositol Effects on Metabolic Syndrome: A Systematic ReviewExpert Rev Clin Pharmacol, 2016 · PMID 27729235
  33. Bakuchiol: a retinol-like functional compound revealed by gene expression profiling and clinically proven to have anti-aging effectsInt J Cosmet Sci, 2014 · PMID 24471735
  34. Osteoblasts proliferation and differentiation stimulating activities of the main components of Fructus Psoraleae corylifoliaePhytomedicine, 2014 · PMID 24220018
  35. Neobavaisoflavone stimulates osteogenesis via p38-mediated up-regulation of transcription factors and osteoid genes expression in MC3T3-E1 cellsPhytomedicine, 2012 · PMID 22397994
  36. Psoralen stimulates osteoblast differentiation through activation of BMP signalingBiochem Biophys Res Commun, 2011 · PMID 21392746
  37. Phytoestrogens from Psoralea corylifolia reveal estrogen receptor-subtype selectivityPlanta Med, 2010 · PMID 19577453
  38. Psoralen photochemotherapy (PUVA) is only moderately effective in widespread vitiligo: a 10-year retrospective studyClin Exp Dermatol, 2002 · PMID 11952699
  39. Treatment of vitiligo with UV-B radiation vs topical psoralen plus UV-AArch Dermatol, 1997 · PMID 9420536
  40. Evaluation of the therapeutic effects of Aloe vera gel on minor recurrent aphthous stomatitisDent Res J · PMID 23162576
  41. Acemannan, a Polysaccharide Extracted from Aloe vera, Is Effective in the Treatment of Oral Aphthous UlcerationJ Altern Complement Med · PMID 23240939
  42. Effects of Aloe Vera in the Treatment of Oral Ulcers: A Systematic Review and Meta-Analysis of Randomised Controlled Trials.Oral Health Prev Dent · PMID 36504087
  43. Efficacy of Aloe Vera Supplementation on Prediabetes and Early Non-Treated Diabetic Patients: A Systematic Review and Meta-Analysis of Randomized Controlled TrialsNutrients · PMID 27347994
  44. Effect of Aloe vera on glycaemic control in prediabetes and type 2 diabetes: a systematic review and meta-analysisJ Clin Pharm Ther · PMID 27009750
  45. Effects of Aloe vera in adults with mucocutaneous problems: A systematic review and meta-analysis.J Adv Nurs · PMID 33336470
  46. Natural and miscellaneous agents for the prevention of acute radiation dermatitis: a systematic review and meta-analysis.Support Care Cancer · PMID 36859690
  47. Is Effective and Safe in Short-term Treatment of Irritable Bowel Syndrome: A Systematic Review and Meta-analysis.J Neurogastroenterol Motil · PMID 30153721
  48. The combined therapy with myo-inositol and D-chiro-inositol reduces the risk of metabolic disease in PCOS overweight patients compared to myo-inositol supplementation aloneEur Rev Med Pharmacol Sci · PMID 22774396
  49. Effects of inositol on ovarian function and metabolic factors in women with PCOS: a randomized double blind placebo-controlled trialEur Rev Med Pharmacol Sci · PMID 15206484
  50. Differential insulin response to myo-inositol administration in obese polycystic ovary syndrome patientsGynecol Endocrinol · PMID 22612517
  51. Inositol administration reduces oxidative stress in erythrocytes of patients with polycystic ovary syndromeEur J Endocrinol · PMID 22223702
  52. Effects of d-chiro-inositol in lean women with the polycystic ovary syndromeEndocr Pract · PMID 15251831
  53. Insulin sensitiser agents alone and in co-treatment with r-FSH for ovulation induction in PCOS womenGynecol Endocrinol · PMID 20222840
  54. Efficacy of myo-inositol in the treatment of cutaneous disorders in young women with polycystic ovary syndromeGynecol Endocrinol · PMID 19551544
  55. Metabolic and hormonal effects of myo-inositol in women with polycystic ovary syndrome: a double-blind trialEur Rev Med Pharmacol Sci · PMID 19499845
  56. Myo-inositol administration positively affects hyperinsulinemia and hormonal parameters in overweight patients with polycystic ovary syndromeGynecol Endocrinol · PMID 18335328
  57. Pharmacological and Non-Pharmacological Interventions for Polycystic Ovary Syndrome (PCOS) in Indian Women: A Systematic Review and Meta-Analysis.Pharmaceuticals · PMID 40430499
  58. Inositol is an effective and safe treatment in polycystic ovary syndrome: a systematic review and meta-analysis of randomized controlled trials.Reprod Biol Endocrinol · PMID 36703143
  59. Effects of myo-inositol supplementation on oocyte's quality in PCOS patients: a double blind trialEur Rev Med Pharmacol Sci · PMID 21744744
  60. Myo-inositol rather than D-chiro-inositol is able to improve oocyte quality in intracytoplasmic sperm injection cycles. A prospective, controlled, randomized trialEur Rev Med Pharmacol Sci · PMID 21608442
  61. Myo-inositol may prevent gestational diabetes in PCOS womenGynecol Endocrinol · PMID 22122627
  62. Inositol for subfertile women with polycystic ovary syndrome.Cochrane Database Syst Rev · PMID 30570133
  63. Myo-inositol treatment increases serum plasmalogens and decreases small dense LDL, particularly in hyperlipidemic subjects with metabolic syndromeJ Nutr Sci Vitaminol · PMID 18635905
  64. One-year effects of myo-inositol supplementation in postmenopausal women with metabolic syndromeClimacteric · PMID 22192068
  65. A phase I study of myo-inositol for lung cancer chemopreventionCancer Epidemiol Biomarkers Prev · PMID 16896044
  66. Treatment of hirsutism with myo-inositol: a prospective clinical studyReprod Biomed Online · PMID 18854115
  67. Inositol for depressive disorders.Cochrane Database Syst Rev · PMID 15106232
  68. Double-blind, controlled trial of inositol treatment of depressionAm J Psychiatry · PMID 7726322
  69. Treatment-resistant bipolar depression: a STEP-BD equipoise randomized effectiveness trial of antidepressant augmentation with lamotrigine, inositol, or risperidoneAm J Psychiatry · PMID 16449473
  70. Inositol addition does not improve depression in SSRI treatment failuresJ Neural Transm · PMID 10907738
  71. Effect of inositol on bulimia nervosa and binge eatingInt J Eat Disord · PMID 11262515
  72. Inositol Nutritional Supplementation for the Prevention of Gestational Diabetes Mellitus: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.Nutrients · PMID 35889788
  73. The effect of myoinositol supplementation on insulin resistance in patients with gestational diabetesDiabet Med · PMID 21414183
  74. Dietary supplementation with myo-inositol in women during pregnancy for treating gestational diabetes.Cochrane Database Syst Rev · PMID 27602537
  75. A phase 2 randomized trial of ELND005, scyllo-inositol, in mild to moderate Alzheimer diseaseNeurology · PMID 21917766
  76. Inositol treatment of Alzheimer's disease: a double blind, cross-over placebo controlled trialProg Neuropsychopharmacol Biol Psychiatry · PMID 8843494
  77. Lack of effect of inositol treatment in chronic schizophreniaBiol Psychiatry · PMID 8329500
  78. CSF inositol in schizophrenia and high-dose inositol treatment of schizophreniaEur Neuropsychopharmacol · PMID 7894259
  79. Double-blind, controlled, crossover trial of inositol versus fluvoxamine for the treatment of panic disorderJ Clin Psychopharmacol · PMID 11386498
  80. Double-blind, placebo-controlled, crossover trial of inositol treatment for panic disorderAm J Psychiatry · PMID 7793450
  81. Acute inositol does not attenuate m-CPP-induced anxiety, mydriasis and endocrine effects in panic disorderJ Psychiatr Res · PMID 9352475
  82. Myo-inositol in the treatment of premenstrual dysphoric disorderHum Psychopharmacol · PMID 22031267
  83. Myo-inositol has no beneficial effect on premenstrual dysphoric disorderWorld J Biol Psychiatry · PMID 12478879
  84. Inositol as an add-on treatment for bipolar depressionBipolar Disord · PMID 11254020
  85. Inositol treatment of autismJ Neural Transm · PMID 9203092
  86. Inositol treatment of obsessive-compulsive disorderAm J Psychiatry · PMID 8780431
  87. Inositol treatment of post-traumatic stress disorderAnxiety · PMID 9160600
  88. Lack of effect of 6 g inositol treatment of post-ECT cognitive function in humansJ Psychiatr Res · PMID 8642546
  89. The effect of inositol supplements on the psoriasis of patients taking lithium: a randomized, placebo-controlled trialBr J Dermatol · PMID 15149510
  90. Pretreatment with myo-inositol in non polycystic ovary syndrome patients undergoing multiple follicular stimulation for IVF: a pilot studyReprod Biol Endocrinol · PMID 22823904
  91. The effects of inositol supplementation on lipid profiles among patients with metabolic diseases: a systematic review and meta-analysis of randomized controlled trials.Lipids Health Dis · PMID 29793496
  92. The efficacy and safety of inositol supplementation in preterm infants to prevent retinopathy of prematurity: a systematic review and meta-analysis.BMC Ophthalmol · PMID 31238915
  93. Oral polypodium leucotomos extract photoprotective activity in 57 patients with idiopathic photodermatosesG Ital Dermatol Venereol · PMID 21505393
  94. Double-blind, randomized, placebo-controlled pilot study with anapsos in senile dementia: effects on cognition, brain bioelectrical activity and cerebral hemodynamicsMethods Find Exp Clin Pharmacol · PMID 11196347
  95. Treatment of vitiligo vulgaris with narrow-band UVB and oral Polypodium leucotomos extract: a randomized double-blind placebo-controlled studyJ Eur Acad Dermatol Venereol · PMID 17659004
  96. Photoprotective activity of oral polypodium leucotomos extract in 25 patients with idiopathic photodermatosesPhotodermatol Photoimmunol Photomed · PMID 17254039
  97. Oral Polypodium leucotomos extract decreases ultraviolet-induced damage of human skinJ Am Acad Dermatol · PMID 15583582
  98. A new agent (hydrophilic fraction of polypodium leucotomos) for management of psoriasisInt J Dermatol · PMID 4609374
  99. Oral administration of a hydrophilic extract of Polypodium leucotomos for the prevention of polymorphic light eruptionJ Am Acad Dermatol · PMID 21696853
  100. Probiotics for people with cystic fibrosis.Cochrane Database Syst Rev · PMID 31962375