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Palmitoylethanolamide supplementation for human health: A state-of-the-art systematic review of Randomized Controlled Trials in patient populations

Bortoletto R, Comacchio C, Garzitto M, Piscitelli F, Balestrieri M, Colizzi M. Brain, Behavior, & Immunity - Health, 2025; 43:100927.

ReviewHumans

Design
Review
Subjects
48 studies, of which 47 were randomised controlled trials
Dose used in the study
The included trials used about 150 to 700 mg, once or twice a day
Duration
From 3 days to 53 weeks
What was measured
What the randomised trial evidence shows for palmitoylethanolamide across patient populations: neuropsychiatric, neurological, bodily pain and function, gut and internal organ, and blood marker outcomes, following PRISMA 2020 methodology.

What the authors reported

Most included trials rated good quality on the Joanna Briggs Institute tool, two rated fair. Palmitoylethanolamide was well tolerated across the trials, with no relevant adverse events.

Limits of this study

A systematic review without a pooled analysis. The authors note that the trials differ in method and in formulation, which makes them hard to compare. The entry was checked against the article page and the Crossref record. Funding and conflicts were not visible on the page checked.

Source

doi:10.1016/j.bbih.2024.100927

Entry checked against the article page at the publisher (ScienceDirect), with the citation from Crossref on 2026-09-21. The dose shown is the dose the researchers used. It is not a recommendation. How to read this page.