Preference for dietary fat: From detection to disease

Area of Science:

• Physiology
• Nutrition Science
• Sensory Science

Background:

• Taste physiology research increasingly recognizes distinct sensory cues for dietary components.
• Long-chain fatty acids (LCFAs) are proposed to have a unique oro-sensory detection mechanism.
• The classification of 'fat taste' as a basic or alimentary taste is under investigation.

Purpose of the Study:

• To review recent advances in fat taste physiology.
• To explore the role of lipid sensors in dietary fat preference.
• To identify potential anti-obesity strategies targeting fat taste mechanisms.

Main Methods:

• Review of current literature on taste physiology and lipid sensing.
• Analysis of studies investigating the link between dietary fat intake and taste sensitivity.
• Discussion of molecular mechanisms involving CD36 and GPR120 in fat perception.

Main Results:

• Dietary fat content significantly modulates fat taste perception and sensitivity.
• Activation of tongue lipid sensors (e.g., CD36, GPR120) by LCFAs triggers taste signaling pathways.
• Reduced oro-sensory detection of LCFAs is associated with increased fat consumption and obesity.

Conclusions:

• Fat taste functions as a distinct taste modality, crucial for regulating dietary fat intake.
• Lipid sensor pathways represent promising targets for developing anti-obesity interventions.
• Understanding fat taste physiology is key to addressing diet-related health issues.