Food enters the mouth and passes to the anus through the hollow organs of the GI tract. The liver, pancreas, and gallbladder are the solid organs of the digestive system. The digestive system helps the body digest food. Bacteria in the GI tract, also called gut flora or microbiome, help with digestion.
https://www.niddk.nih.gov/health-information/digestive-diseases/digestive-system-how-it-works
Your body uses mechanical and chemical means to digest food and it varies depending on the individual according to Michael Picco, M.D With Mayo Clinic gastroenterologist. The digestion process takes between 24 and 72 hours, six to eight hours to pass through your stomach and small intestine. Then the food enters your large intestine (colon) for further digestion and absorption of water. Elimination of undigested food residue usually begins after 24 hours. Complete elimination from the body may take several days..
http://www.cleanse-yourself-lose-weight.com/digestion-time.html
Here are the time sequences for different food groups: 1  Water & Juices: 20-30 minutes. 2  Fruits, Smoothies, Soups: 30-45 minutes. 3  Vegetables: 30-45 minutes. 4  Beans, Grains, Starches: 2-3 hours. 5  Meat, Fish, Poultry: 3 or more hours. 6  Drink warm or hot liquids with your meal.
http://www.cleanse-yourself-lose-weight.com/digestion-time.html
Small intestine. The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine and push the mixture forward to help with further digestion. The walls of the small intestine absorb the digested nutrients into the bloodstream.
https://www.niddk.nih.gov/health-information/digestive-diseases/digestive-system-how-it-works
Animal proteins: Egg yolk - 30 min. digestion time Whole egg - 45 min. Fish - cod, scrod, flounder, sole seafood - 30 min. digestion time Fish - salmon, salmon trout, herring, (more fatty fish) - 45 min. to 60 digestion time Chicken - 11/2 to 2 hours digestion time (without skin) Turkey - 2 to 2 1/4 hours digestion time (without skin) Beef, lamb - 3 to 4 hours digestion time Pork - 41/2 to 5 hours.
http://www.cleanse-yourself-lose-weight.com/digestion-time.html
How long it takes to digest food In general, food takes 24 to 72 hours to move through your digestive tract. The exact time depends on the amounts and types of foods you’ve eaten. The rate is also based on factors like your gender, metabolism, and whether you have any digestive issues that could slow down or speed up the process.
https://www.healthline.com/health/how-long-does-it-take-to-digest-food
Points to Remember. 1  Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. 2  Digestion works by moving food through the gastrointestinal (GI) tract. 3  Digestion begins in the mouth with chewing and ends in the small intestine.
https://www.niddk.nih.gov/health-information/digestive-diseases/digestive-system-how-it-works
When we put food into our stomachs at these late hours there are not enough digestive enzymes to properly digest it. This undigested food sits in your stomach and will often disturb your sleep. Take a brisk walk after eating.
http://www.cleanse-yourself-lose-weight.com/digestion-time.html
A Mayo Clinic study found that the average time food spends in the large intestine varies by gender: 33 hours for men and 47 hours for women. Your digestion rate is also based on what you’ve eaten. Meat and fish can take as long as two days to fully digest. The proteins and fats they contain are complex molecules that take longer for your body to pull apart. By contrast, fruits and vegetables, which are high in fiber, move through your system in less than a day.
https://www.healthline.com/health/how-long-does-it-take-to-digest-food
The digestion process takes between  24 and 72 hours, six to eight hours to pass through your stomach and small intestine. Then the food enters your large intestine (colon) for further digestion and absorption of water. Elimination of undigested food residue usually begins after 24 hours.
http://www.cleanse-yourself-lose-weight.com/digestion-time.html
hours long does it take food to start digesting
The digestion process takes between 24 and 72 hours, six to eight hours to pass through your stomach and small intestine.