April 18, 2021

How Long Does It Take to Digest Food

Breaking down digestion speed

illustration of stomach with food inside

Why is it after eating certain foods, you can feel full for hours, but after others, you’re looking for a snack within minutes?


Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy

It’s all about your body’s digestion of food and several other factors that affect how long the process can take. To get a better sense of those factors and how long it takes for you to digest food, we spoke with gastroenterologist Christine Lee, MD.

What is digestion?

Digestion is the process of breaking food down into the nutrients your body can use. It starts at your mouth and finishes at the end of the terminal ileum (small intestine),” explains Dr, Lee.

“Seeing and smelling food is what kick-starts the process. In response, your body starts making extra saliva, which contains enzymes that initiate digestion,” she adds. “Once you get the food chewed and swallowed, the real work begins in the stomach.”

In your stomach, the food mixes with those digestive juices, creating a watery concoction that passes into the small bowel. “The small bowel’s walls absorb needed nutrients and water,” says Dr. Lee. “The colon (large bowel) then takes what your body didn’t use and prepares to get rid of it through a bowel movement.”

How long does food take to digest?

Dr. Lee says the entire digestive process can take several hours. Food generally stays in your stomach between 40 and 120-plus minutes. Then add another 40 to 120 minutes for time spent in the small bowel.

“The denser the food, meaning the more protein or fat it has, the longer it takes to digest,” notes Dr. Lee.


“Simple carbohydrates, such as plain rice, pasta or simple sugars, average between 30 and 60 minutes in the stomach,” she adds. “But if you put a thick layer of peanut butter on toast, or layer avocado and eggs, it can take upwards of between two to four hours to leave your stomach. Throw in a piece of bacon and it’s even longer.”

How long does it take water to digest?

Liquids leave the stomach faster because there is less to break down:

  • Plain water: 10 to 20 minutes.
  • Simple liquids (clear juices, tea, sodas): 20 to 40 minutes.
  • Complex liquids (smoothies, protein shakes, bone broths): 40 to 60 minutes.

Factors that affect how long digestion takes

Dr. Lee cautions, though, that these times are estimates. How long it takes to digest food varies depending on:

  • Your body type.
  • Your metabolism.
  • Medications you take.
  • Types of food you eat.
  • Level of physical activity overall exercise fitness.
  • Living a sedentary versus physically active lifestyle.
  • Past surgeries you’ve endured.
  • Stress level.

“Genetics and age matter, too. Some people are born with faster metabolisms,” says Dr. Lee. “And as we get older, our metabolism and motility slow down. People also start developing medical conditions, such as high blood pressurediabetes and atherosclerosis. Medications for these conditions can delay digestion.”

Medications and supplements that may affect how long digestion takes include:

  • Arthritis medications.
  • Anticholinergics.
  • Antidepressants.
  • Antispasmodic medications.
  • Diabetes medications.
  • Oral contraceptives.
  • Parkinson’s disease medications.

Is it possible to tell when your stomach is empty?

Just because you feel hungry doesn’t mean your stomach is on “E,” says Dr. Lee.


“Our hunger cues can be hormonally regulated, so if you have a high level of hunger hormones floating around, you may feel hungry — even if your stomach is full,” she says.

“Some medications, like prednisone, increase your appetite by increasing the appetite-stimulating hormones. That means you may feel hungrier more often when taking these medications, even if you had enough to eat.”

Your perception of these sensations is also highly individual. “The classic example is a heart attack,” Dr. Lee adds. “Many people have bonafide heart attacks but didn’t notice any chest pain. Likewise, some people experience chest pains without having had a heart attack. Similarly, some patients feel hunger, but their stomach is not empty.”

Related Articles

Magnifying glass looking microbes in intestines
July 30, 2023
Gut Check: Fun Facts About Your Digestive System

Your gut never really stops working — and that’s not even the most incredible thing about it

woman holding lower abdomen in discomfort
June 15, 2023
How Uterine Fibroids Affect Your Digestive System

Depending on size and location, they can affect your rectum, stomach, bladder and kidneys

Physician examines oversized colon with giant magnifying glass, with report in foreground
March 1, 2024
Colon Cancer Screenings: When To Start

If you’re at average risk, it’s recommended that you get your first colonoscopy at age 45

Closeup of people holding up shot glasses
February 15, 2024
What Does Alcohol Do to Your Body? 9 Ways Alcohol Affects Your Health

Alcohol affects your whole body, from your liver and immune system to your brain and mental health

Two bariatric surgery options: grastric bypass and gastric sleeve
February 14, 2024
How To Know Which Type of Bariatric Surgery Is Right for You

Gastric bypass and sleeve gastrectomy are different procedures that offer similar benefits, including significant weight loss

person practicing mindfulness at night time on a yoga mat
February 5, 2024
Living Well With Crohn’s Disease: 8 Self-Care Tips

Studies show a strong self-care regimen can improve symptoms and overall health

Person clutching stomach, with over-sized digestive track in background
January 30, 2024
A Nutritional Plan for Anyone Living With Crohn’s Disease or Ulcerative Colitis

If you have IBD, there are roughly nine food types that might contribute to inflammation flare-ups

group of people doing an aerobics class
January 26, 2024
How Exercise Can Lead to a Healthy Gut

You don’t need a strenuous or expensive fitness routine to keep your digestive tract in shape

Trending Topics

White bowls full of pumpkin seeds, dark chocolate and various kinds of nuts
25 Magnesium-Rich Foods You Should Be Eating

A healthy diet can easily meet your body’s important demands for magnesium

Woman feeling for heart rate in neck on run outside, smartwatch and earbuds
Heart Rate Zones Explained

A super high heart rate means you’re burning more than fat

Spoonful of farro salad with tomato
What To Eat If You’ve Been Diagnosed With Prediabetes

Type 2 diabetes isn’t inevitable with these dietary changes