Fat digestion and absorption in spice-pretreated rats

Area of Science:

• Nutritional Science
• Gastroenterology
• Metabolic Studies

Background:

• Certain spices stimulate bile secretion and bile acid production, crucial for dietary lipid digestion and absorption.
• Investigating the efficacy of common spices in improving digestion and fat absorption during high-fat intake is warranted.

Purpose of the Study:

• To evaluate the effects of dietary ginger, piperine, capsaicin, and curcumin on bile secretion, pancreatic digestive enzymes, and fat absorption in rats fed a high-fat diet.
• To determine if these spices can mitigate negative effects of high-fat diets on lipid metabolism.

Main Methods:

• Wistar rats were fed a high-fat (30%) diet for 8 weeks with specific concentrations of ginger, piperine, capsaicin, and curcumin.
• Measurements included pancreatic enzyme activities (lipase, amylase, trypsin, chymotrypsin), bile secretion and acid content, and fat absorption efficiency.

Main Results:

• Spices significantly enhanced pancreatic enzyme activities (lipase, amylase, trypsin, chymotrypsin) by 22-81%.
• Dietary spices increased bile secretion and bile acid content, promoting fat absorption.
• Capsaicin and piperine reduced perirenal adipose tissue, prevented triglyceride accumulation in liver and serum, and decreased lipogenic enzyme activity in the liver.

Conclusions:

• Dietary ginger and other spice compounds improve fat digestion and absorption in high-fat diets by enhancing bile salt secretion and pancreatic lipase activity.
• These spices facilitate energy expenditure, thereby preventing the accumulation of absorbed fats and supporting metabolic health.