General Dosage
2-6 g daily (providing approximately 160-480 mg GLA)
Maximum dose: Up to 6 g/day used in clinical trials without significant adverse effects
Evening Primrose Oil Dosage Guide
Evidence:Moderate
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Dosage Recommendations
General recommendation: 2-6 g daily (providing approximately 160-480 mg GLA)
Timing: Take with meals to improve absorption of the fat-soluble fatty acids • Take with food for best absorption.
Dosage by Condition
Skin hydration and elasticity
500 mg-3 g daily for 12+ weeksModerate
Atopic dermatitis
4-6 g daily (320-480 mg GLA) for 12 weeksModerate
General skin health
1-3 g dailyModerate
| Condition | Recommended Dose | Evidence |
|---|---|---|
| Skin hydration and elasticity | 500 mg-3 g daily for 12+ weeks | Moderate |
| Atopic dermatitis | 4-6 g daily (320-480 mg GLA) for 12 weeks | Moderate |
| General skin health | 1-3 g daily | Moderate |
Upper limit: Up to 6 g/day used in clinical trials without significant adverse effects
Timing & Absorption
Take with meals to improve absorption of the fat-soluble fatty acids
Best taken with food for optimal absorption.
Find a Evening Primrose Oil with the right dose
We verify actual dosage against clinical research
References
- RCTMuggli R. (2005). Systemic evening primrose oil improves the biophysical skin parameters of healthy adults. International Journal of Cosmetic Science. DOI PubMed
- Meta-analysisBamford JTM, Ray S, Musekiwa A, et al. (2013). Oral evening primrose oil and borage oil for eczema. Cochrane Database of Systematic Reviews. DOI PubMed
- Morse NL, Clough PM. (2006). A meta-analysis of randomized, placebo-controlled clinical trials of Efamol evening primrose oil in atopic eczema. Journal of Dermatological Treatment. DOI PubMed
- RCTKawamura A, Ooyama K, Kojima K, et al. (2011). Dietary supplementation of gamma-linolenic acid improves skin parameters in subjects with dry skin and mild atopic dermatitis. Journal of Oleo Science. DOI PubMed
- Ahmad Adni LL, Norhayati MN, Mohd Rosli RR, Muhammad J (2021). A Systematic Review and Meta-Analysis of the Efficacy of Evening Primrose Oil for Mastalgia Treatment.. International journal of environmental research and public health. DOI PubMed
- Moradi M, Niazi A, Heydarian Miri H, Lopez V (2021). The effect of evening primrose oil on labor induction and cervical ripening: A systematic review and meta-analysis.. Phytotherapy research : PTR. DOI PubMed
- Meta-analysisKhorshidi M, Zarezadeh M, Moradi Moghaddam O, Emami MR, et al. (2020). Effect of evening primrose oil supplementation on lipid profile: A systematic review and meta-analysis of randomized clinical trials.. Phytotherapy research : PTR. DOI PubMed
Show 5 more references
- Budeiri D, Li Wan Po A, Dornan JC (1996). Is evening primrose oil of value in the treatment of premenstrual syndrome?. Controlled clinical trials. DOI PubMed
- Horrobin DF, Stewart C (1990). Evening primrose oil in atopic eczema.. Lancet (London, England). DOI PubMed
- Meta-analysisLarki M, Mohammadi S, Makvandi S (2025). The Effect of Evening Primrose Oil on Menopausal Symptoms Management: A Systematic Review and Meta-Analysis.. Journal of caring sciences. DOI PubMed
- Sharifi M, Nourani N, Sanaie S, Hamedeyazdan S (2024). The effect of Oenothera biennis (Evening primrose) oil on inflammatory diseases: a systematic review of clinical trials.. BMC complementary medicine and therapies. DOI PubMed
- Joy CB, Mumby-Croft R, Joy LA (2000). Polyunsaturated fatty acid (fish or evening primrose oil) for schizophrenia.. The Cochrane database of systematic reviews. DOI PubMed