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Hso2.5

Hemp Seed Oil Research

Mostly mechanism / observational

8 peer-reviewed studies

What the evidence says

Mostly mechanism / observational

Most Hemp Seed Oil studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.

Most evidence is from high-quality randomised trials published 2005–2026 with a typical study size of 15 participants.

Based on 8 studies · 5 RCTs · 15 total participants

Confidence

Moderate confidence

By outcome

Skin healthPossible reduction in skin dryness/itch in atopic dermatitis (one small crossover); not confirmed in larger trials · Weeks to a few months
Too few graded studies2 studies

Active research area

4 studies in the last 5 years

200520152026

1RCT2005

Callaway J, Schwab U, Harvima I, Halonen P, Mykkänen O, Hyvönen P · J Dermatolog Treat (2005)

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2RCT2008

Kaul N, Kreml R, Austria JA, Richard MN, Edel AL, Dibrov E · J Am Coll Nutr (2008)

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3RCT2023

Farì G, Megna M, Scacco S, Ranieri M, Raele MV, Chiaia Noya E · Medicina (Kaunas) (2023)

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4RCT2006

Schwab US, Callaway JC, Erkkilä AT, Gynther J, Uusitupa MI, Järvinen T · Eur J Nutr (2006)

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5Review2026

In plain English: This review integrates these compounds within a shared hyperarousal framework to highlight convergent upstream mechanisms that extend beyond their individual effects.

Kovitkanit P, Kamoltham T. · Clocks & sleep (2026)

However, the current evidence base is predominantly preclinical, and definitive conclusions regarding therapeutic efficacy or optimal dosing in humans remain limited.
Future research should prioritize integrative clinical studies that link these specific biological modulations to standardized sleep outcomes to determine their real-world applicability.
Nevertheless, the pathways discussed align with biological domains consistently implicated in established insomnia phenotypes.

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6Systematic Review2012

In plain English: There is no convincing evidence of the benefit of dietary supplements in eczema, and they cannot be recommended for the public or for clinical practice at present.

Bath-Hextall FJ, Jenkinson C, Humphreys R, Williams HC · Cochrane Database Syst Rev (2012)

Cochrane review of 11 RCTs (596 participants) of dietary supplements for atopic eczema, including a hempseed oil vs placebo trial
No convincing evidence that dietary supplements as a class benefit eczema
Provides an honest counterweight to the single positive hempseed-oil crossover

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7RCTn=15 · very small study2024

Young TP, Erickson JS, Hattan SL, Guzy S, Hershkowitz F, Steward MD. · Cannabis and cannabinoid research (2024)

Conclusion: Given that both groups demonstrated improvement, both formulations may be contributing to these findings.
Limitations include the small number of participants, the lack of a true placebo, and limited time on study products.
Additional studies are warranted to explore both CBD-rich hemp products and hempseed oil as treatment options for PACS.

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8Review2021

In plain English: Hempseed oil is a source of healthy polyunsaturated fatty acids, while hempseed itself is a valuable source of essential amino acids, minerals, vitamins, and fibers.

Cerino P, Buonerba C, Cannazza G, D'Auria J, Ottoni E, Fulgione A, Di Stasio A, Pierri B, Gallo A · Cannabis Cannabinoid Res (2021)

Narrative review of hemp as food/nutritional supplement across composition and regulation
Confirms hemp SEED oil's value as a polyunsaturated-fat source and distinguishes it from cannabinoid-rich (CBD) hemp products
Notes most evidence for seed/seed-oil health claims remains preliminary

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View in Research Library

Hemp Seed Oil Research

Mostly mechanism / observational

Efficacy of dietary hempseed oil in patients with atopic dermatitis.

A comparison of fish oil, flaxseed oil and hempseed oil supplementation on selected parameters of cardiovascular health in healthy volunteers.

Hemp Seed Oil in Association with β-Caryophyllene, Myrcene and Ginger Extract as a Nutraceutical Integration in Knee Osteoarthritis: A Double-Blind Prospective Case-Control Study.

Effects of hempseed and flaxseed oils on the profile of serum lipids, serum total and lipoprotein lipid concentrations and haemostatic factors.

Mechanistic Pathways Linking Cannabidiol, Hemp Seed Oil and Black Sesame Oil in Hyperarousal Insomnia: A Narrative Review

Dietary supplements for established atopic eczema.

A Single-Blind, Randomized, Placebo Controlled Study to Evaluate the Benefits and Safety of Endourage Targeted Wellness Formula C Sublingual +Drops in People with Post-Acute Coronavirus Disease 2019 Syndrome

A Review of Hemp as Food and Nutritional Supplement.