Gluten binds cytotoxic compounds generated in heated frying oil

Area of Science:

• Food Science
• Toxicology
• Animal Nutrition

Background:

• Dietary fats, especially when heated, can undergo oxidation and form potentially harmful compounds.
• The role of food additives, like gluten, in modifying the toxicity of heated oils is not fully understood.

Purpose of the Study:

• To investigate the impact of gluten on the toxicity of thermally oxidized frying oil in a rodent model.
• To determine if gluten influences the presence of cytotoxic compounds in heated and filtered oils.

Main Methods:

• Male Wistar rats were fed diets containing fresh oil, heated oil with gluten, or heated and filtered oil for 11 weeks.
• Serum biochemistry (glucose, triacylglycerol, phospholipids, cholesterol) and liver/kidney health were assessed.
• Analysis of low-molecular-weight compounds in filtered oils was performed.

Main Results:

• Rats fed diets with heated oil and gluten showed elevated liver enzymes (AST, ALT) and liver damage (bleeding).
• Rats fed heated and filtered oil without gluten exhibited no liver or kidney damage.
• Gluten significantly reduced low-molecular-weight compounds in heated oil, except ethanol.

Conclusions:

• Gluten appears to interact with thermally oxidized oil components, retaining cytotoxic compounds even after filtration.
• The presence of gluten in heated frying oil contributes to its hepatotoxicity.
• Filtration of heated oil without gluten mitigates its harmful effects on liver and kidney health.