Consumption of an Oil Palm Fruit Extract Promotes Large Bowel Health in Rats

Area of Science:

• Nutritional Science
• Gastroenterology
• Microbiome Research

Background:

• Oil palm fruit is primarily used for edible oils, with limited knowledge on the health benefits of its other components.
• Agro-industrial byproducts like oil palm processing waste represent potential sources of bioactive compounds.

Purpose of the Study:

• To investigate the gastrointestinal benefits of a polyphenol-rich oil palm preparation (OPP) in rats fed a Western-type diet (WD).
• To compare the effects of OPP with high amylose maize starch (HAMS) and green tea extract (GT) on gut health parameters.

Main Methods:

• Rats on a WD were administered OPP (50 mg gallic acid equivalents/day) via food (OPP-F) or drinking water (OPP-D) for 4 weeks.
• Comparisons were made with HAMS (30% in diet) and GT (50 mg GAE/day in drinking water).
• Parameters assessed included caecal digesta mass, short-chain fatty acids (SCFAs), goblet cell counts, and gut microbiota composition.

Main Results:

• OPP treatments significantly increased caecal digesta mass and concentrations of total SCFAs, acetate, and propionate (OPP-D).
• OPP-F increased caecal butyrate concentration, and both OPP treatments enhanced goblet cell numbers in the colon.
• OPP supplementation modulated the abundance of beneficial bacteria, including *Faecalibacterium prausnitzii*, *Akkermansia muciniphila*, and *Ruminococcus gnavus*.

Conclusions:

• Dietary oil palm preparation (OPP) demonstrates potential gastrointestinal benefits, particularly for the large bowel.
• OPP positively influences gut microbiota composition and mucus production, comparable to but less potent than HAMS.
• Further research into OPP as a functional food ingredient is warranted.