Gastrointestinal absorption time for peanut butter
Peanut butter behaves as a relatively fatty solid meal, so gastric emptying is slower than for lighter meals. [1,2] Across foods in general, the time from eating to movement through the stomach and small intestine is about 6 hours on average. [1]
Gastric emptying time for a fatty meal
The stomach gradually empties chyme into the small intestine. [3] Fat-containing meals are associated with prolonged gastric retention compared with lower-fat meals. [2]
Small-intestine absorption timeframe
Most nutrient absorption occurs in the small intestine after chyme enters from the stomach. [3] Small-intestine transit time shows substantial interindividual variation. [4]
Practical time estimate from ingestion to substantial absorption
Substantial digestion and absorption from a peanut-butter meal typically occurs over several hours after ingestion, consistent with average gastric plus small-intestinal processing time of ~6 hours. [1,3]
Factors that change the timing
Meal composition influences gastric emptying. [2] Interindividual variation affects small-bowel transit time. [4]
Lower and upper bounds
Movement through the stomach and small intestine commonly averages about 6 hours, with timing varying by individual and meal characteristics. [1,4]