What produces the acid ph indicating that fat digestion has occurred?

the fatty acids of triglyceride cause the acidic condition.Thus this situation will indicate the fat digested has occurred.

Explanation:

Under the action of enteric lipase and pancreatic lipase, fats already emulsified, decompose into fatty acids and glycerol, and thus can be absorbed. The digestion of fats occurs almost entirely in the small intestine, however, the preparatory action occurs in the anterior walls of the gastrointestinal tract. In the stomach, only emulsified fats (milk and egg yolk fat) receive the action of gastric lipase, which breaks down fats into fatty acids and glycerol.

The indication that the fat was ingested, occurs through the acidity of the stomach. That's because triglyceride fatty acids, resulting from the breakdown of fat, cause the acidic condition.

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