Refined Palmolein Oil

About

What it is and where it shows up.

Refined palmolein oil is the liquid fraction obtained by fractionating crude palm oil (Elaeis guineensis) and subsequently subjecting it to refining, bleaching, and deodorization (RBD process); it is widely used as a cooking, frying, and food-manufacturing oil due to its oxidative stability, high smoke point, and relatively balanced fatty acid profile.

Safety summary

The regulatory and scientific consensus.

During high-temperature refining, process contaminants including glycidyl fatty acid esters (GE) and 3-monochloropropanediol (3-MCPD) esters are generated; EFSA has classified GE as genotoxic and carcinogenic and 3-MCPD as a non-genotoxic carcinogen, with the olein fraction accumulating higher concentrations of these substances than palm oil itself. Infants fed formula containing refined palmolein may slightly exceed EFSA's tolerable daily intake for 3-MCPD (0.8 µg/kg body weight/day), making this population of particular concern. High habitual intake of palmolein's saturated fatty acid component (palmitic acid) may adversely affect LDL cholesterol and lipoprotein profiles, though evidence from RCTs remains contested.

Regulatory landscape

What food-safety regulators have decided.

Jurisdiction	Status	Note
EFSA (European Food Safety Authority) (European Union)	Restricted	Approved for use as an edible oil but subject to process contaminant limits under EC/1881/2006 as amended: GE ≤1 mg/kg in vegetable oils (Commission Regulation EU 2018/290); 3-MCPD ester limit 2.5 ppm for palm oil and derivatives. EFSA TDI for 3-MCPD revised to 0.8 µg/kg bw/day (January 2018). GE deemed a public health concern for all younger age groups at average exposure. EU does not permit foods with contaminants at levels unacceptable from a public health viewpoint (Regulation 315/93/EEC).source
FSSAI (Food Safety and Standards Authority of India) (India)	Approved	Regulated under FSS (Food Products Standards and Food Additives) Regulations 2011 (as amended, 14th Amendment 2017). Palm oil (and by extension palmolein) must conform to standards under Regulation 2.2.1(16); residual hexane ≤5 ppm; flash point ≥250°C (Pensky-Marten closed method). Total Polar Compounds in used frying oil must not exceed 25%. Nutritional claims for palmolein permitted under FSS (Advertising and Claims) First Amendment Regulations 2020, effective July 1, 2021. Argemone oil test must be negative.source
FDA (Food and Drug Administration) (United States)	Approved	Palm oil and its fractions, including palmolein, are considered GRAS through common use in food prior to 1958 under 21 CFR 170.30(c). No specific maximum intake limit established for palmolein as a fraction. Non-hydrogenated palm oil fractions are unaffected by FDA's 2015 final determination removing partially hydrogenated oils from GRAS status.source

Who should approach with care

Whose guidance would steer them away.

Infants — Refined palmolein added to infant formula is a primary delivery route for GE and 3-MCPD esters; EFSA (2016, 2018) found that formula-fed infants may slightly exceed the 3-MCPD TDI and face the greatest relative GE exposure — up to ten times what would be considered of low public health concern.

Children — EFSA identified potential health concerns from average GE and 3-MCPD exposure in all younger age groups due to lower body weight relative to intake, meaning even typical dietary exposure can approach or exceed tolerable levels.

Heart Disease — Palm olein's substantial palmitic acid (saturated fat) content may adversely alter lipoprotein profiles compared with unsaturated oils, warranting caution for individuals with pre-existing cardiovascular disease or dyslipidaemia (PMC6628844).

Pregnancy — Given the genotoxic and carcinogenic classification of GE contaminants by EFSA, and the enrichment of GE in the refined olein fraction, precautionary reduction of exposure during pregnancy is advisable pending further toxicological data.

Research citations

The sources behind this verdict.

1PubMed. A summary of 2-, 3-MCPD esters and glycidyl ester occurrence during frying and baking processes, 2021. pmc.ncbi.nlm.nih.gov
2PubMed. Palm Oil on the Edge, 2019. pmc.ncbi.nlm.nih.gov
3PubMed. Intake of Palm Olein and Lipid Status in Healthy Adults: A Meta-Analysis, 2019. pmc.ncbi.nlm.nih.gov
4EFSA. Revised safe intake for 3-MCPD in vegetable oils and food, 2018. efsa.europa.eu
5FSSAI. Food Safety and Standards (Food Products Standards and Food Additives) Fourteenth Amendment Regulations, 2017 – Standards for Oils and Fats, 2017. fssai.gov.in
6EFSA. Process contaminants in vegetable oils and foods, 2016. efsa.europa.eu

Independently researched6 citations