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Analyzing the speed of digestion

Why do some foods make us feel full for hours, while others leave us wanting more within minutes?

We’ll talk about how our bodies digest food and the various factors that affect how long it takes.

What is digestion?

Digestion is the process of breaking down food into nutrients that our bodies can use. It starts in the mouth and ends in the terminal ileum (small intestine).

The process begins with the sight and smell of food. In response, the body begins to secrete extra saliva, which contains enzymes that start digestion. Once we chew and swallow our food, the main process begins in the stomach.

In the stomach, food is mixed with digestive juices, creating a watery slurry that passes into the small intestine. The walls of the small intestine absorb the necessary nutrients and water. The colon (large intestine) then continues to absorb water and electrolytes, but its main function is to eliminate substances that are not absorbed and are useless to our body (feces).

How long does it take to digest food?

The entire digestive process can take several hours. Food generally remains in the stomach for 40 to over 120 minutes. Then, add 40 to 120 minutes for the time it is consumed in the small intestine.

The denser the food, that is, the higher its protein or fat content, the longer the digestion time.

Simple carbohydrates, such as rice, pasta, or simple sugars, stay in your stomach for an average of 30 to 60 minutes. However, if you spread a thick layer of peanut butter on toast or pair it with avocado and eggs, it can take two to four hours for it to move through your stomach.

How long does it take to digest water?

Liquids move through the stomach faster because they contain fewer components to break down:

• Water: 10 to 20 minutes.
• Simple liquids (clear juices, tea, soft drinks): 20 to 40 minutes.
• Complex liquids (smoothies, protein drinks, meat broth): 40 to 60 minutes.

Factors that affect digestion time

These times are estimates.

The time it takes to digest food varies depending on:

• Your body type.
• Your metabolism.
• The medications you take.
• The types of foods you eat.
• Your level of physical activity and overall fitness.
• Sedentary lifestyle versus a more active lifestyle.
• Any previous surgeries.
• Stress levels.
• Genes and age also play a role. Some people are naturally faster metabolizers. And as we age, our metabolism and mobility decline. We also start to develop health problems, such as high blood pressure, diabetes, and atherosclerosis. Medications for these conditions may slow digestion.
• Medications and supplements that may affect the length of digestion include:
• Arthritis medication.
• Anticholinergics.
• Antidepressants.
• Anticonvulsants.
• Diabetes medication.
• Contraceptives.
• Parkinson’s disease medication.

Can you tell when your stomach is empty?

Just because you feel hungry doesn’t mean your stomach is empty.

Hunger is regulated by hormones, so if you have high levels of hunger hormones circulating in your body, you may feel hungry — even if your stomach is full.

Some medications, such as cortisone, increase your appetite by increasing hormones that stimulate appetite. This means that while you are taking these medications, you may feel hungry more often, even if you have eaten enough.

The perception of these sensations is also very personal. Some people feel hungry even though their stomach is not empty.