What substance produced by the liver aids in the digestion of fats?

Bile, produced by the liver, is essential for the digestion of fats. It contains bile salts, which help emulsify fats in the small intestine, breaking them down into smaller droplets. This emulsification increases the surface area of the fats, making them more accessible to digestive enzymes.

While lipase is another enzyme that helps in fat digestion, it is produced by the pancreas, not the liver. Pancreatic amylase primarily assists in the digestion of carbohydrates, and trypsin, also produced by the pancreas, is involved in the digestion of proteins. Therefore, bile is the specific substance from the liver that directly aids in the digestion of fats, making it the correct answer.