Doctor Explains the “Coffee Belly” Myth

Source: SM-Clinic / Gastroenterologist Natalya Rusantsova
Author: Qahwa World
Date: July 29, 2026

Doctor Explains the “Coffee Belly” Myth

  • “Coffee belly” is widely discussed on social media.
  • A gastroenterologist explains that coffee itself does not cause fat deposits.
  • Caffeine temporarily raises cortisol—a normal physiological response.
  • Risk arises when coffee is combined with stress, poor sleep, and unhealthy eating.
  • Drinking coffee on an empty stomach can lead to overeating later.
  • Lattes, raf, mocha, and other add-ins contain hundreds of calories.
  • 3-4 cups of coffee daily are safe for most adults.

“Coffee belly” is increasingly discussed on social media. Many believe that regular coffee consumption leads to belly fat accumulation. However, doctors note that coffee itself is not the cause of weight gain.

Gastroenterologist Natalya Rusantsova from SM-Clinic explained that coffee cannot directly cause fat deposition. If it did, the problem would be observed in every coffee lover.

Caffeine and Cortisol: A Normal Response

Caffeine temporarily raises cortisol levels—the stress hormone. For healthy individuals, this is a normal physiological reaction. Hormone levels return to normal shortly after. For most people, this effect poses no danger.

However, risk arises when coffee consumption is combined with chronic stress, lack of sleep, disrupted eating patterns, and low physical activity. In such conditions, cortisol levels can remain elevated for much longer. This contributes to the accumulation of visceral fat around internal organs.

Coffee on an Empty Stomach and Overeating

Many people drink coffee on an empty stomach or replace a full breakfast with it. After a temporary decrease in appetite, a strong feeling of hunger often arises. This leads to overeating and the consumption of high-calorie foods.

Factors Contributing to “Coffee Belly”
Factor Effect
Caffeine + chronic stress Prolonged cortisol elevation, visceral fat accumulation
Coffee on an empty stomach Appetite suppression, followed by strong hunger and overeating
Coffee drinks with additives Lattes, raf, mocha contain hundreds of calories per serving
Lack of sleep Enhanced stress response, metabolic disruption
Low physical activity Slowed metabolism, fat accumulation

Coffee Drinks with Additives: Hidden Calories

Coffee drinks with additives play a separate role. Lattes, raf, mocha, and other drinks with cream, syrups, and sugar can contain several hundred kilocalories in a single serving. In this case, the cause of weight gain is the additional ingredients, not the coffee itself.

Doctor’s Recommendations

The doctor recommends that people experiencing weight gain first pay attention to their lifestyle, sleep patterns, diet, and physical activity. In the absence of contraindications, consuming 3-4 cups of coffee per day is considered safe for most adults.

Frequently Asked Questions

Does “coffee belly” actually exist?Coffee itself does not cause fat deposits. “Coffee belly” is a myth. Weight gain is related to lifestyle, stress, and coffee additives.

How does caffeine affect cortisol?Caffeine temporarily raises cortisol levels. This is a normal reaction for healthy individuals. Hormone levels quickly return to normal.

When can coffee contribute to weight gain?When combined with chronic stress, lack of sleep, disrupted eating patterns, and low physical activity. Also when drinking coffee on an empty stomach.

Why is coffee on an empty stomach harmful?It temporarily suppresses appetite but later causes strong hunger. This leads to overeating and consumption of high-calorie foods.

Which coffee drinks are most caloric?Lattes, raf, mocha, and other drinks with cream, syrups, and sugar. They can contain hundreds of calories per serving.

How much coffee is safe to drink?In the absence of contraindications, 3-4 cups of coffee per day are considered safe for most adults.

The Best Time to Drink Coffee, According to Experts

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For many people, coffee is the first step in starting the day. However, experts suggest that when you drink your coffee may influence how your body responds to it.

After waking up, the body naturally increases production of cortisol, a hormone linked to alertness. This typically peaks within the first 30 to 60 minutes. Some experts suggest that drinking coffee during this period may make caffeine feel less effective, as the body is already in a naturally alert state.

Hydration is another factor to consider. After several hours of sleep without fluids, the body may be slightly dehydrated. Drinking coffee before water may contribute to feelings of fatigue or dryness, particularly in people who are sensitive to caffeine.

Some individuals may also experience stomach discomfort when consuming coffee on an empty stomach, including increased acidity, although responses vary.

A commonly recommended approach is to wait 60 to 90 minutes after waking before having your first cup of coffee. This allows the body’s natural rhythm to settle and may help caffeine provide a more balanced and sustained energy boost.

Other morning habits can also influence energy levels. Diets high in sugar and low in protein may lead to fluctuations in energy, while exercising on an empty stomach may leave some people feeling fatigued. Immediate exposure to emails or screens may also contribute to early mental strain.

A more gradual start to the day may support steadier energy levels. Drinking water first, getting exposure to natural light, and delaying caffeine intake slightly are simple adjustments that [uncertain] may help improve how you feel later in the day.

Nutritionist: Genes Determine How Coffee Affects the Body

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Coffee has become an essential part of the morning routine for millions of people around the world, yet its effects on the body are not the same for everyone. According to nutritionist and specialist in natural health methods Janna Tikhanycheva, the way coffee influences the body depends largely on genetic factors, lifestyle, and consumption levels.

The expert explained that the body’s ability to absorb and process caffeine is linked to a gene known as CYP1A2. Some people carry versions of this gene that slow down caffeine metabolism, making them more sensitive to its effects. As a result, even a single cup can cause anxiety, insomnia, or an increased heart rate. For these individuals, Tikhanycheva recommends consuming coffee in moderation and remembering that caffeine is also present in tea, chocolate, and certain medications.

Coffee beans contain hundreds of compounds some beneficial, such as antioxidants, and others that may negatively impact the body. Moderate coffee consumption has been associated with a lower risk of neurodegenerative diseases and depression, as well as improved insulin sensitivity, which can help reduce the likelihood of developing type 2 diabetes.

However, excessive intake can have the opposite effect. Caffeine blocks adenosine receptors in the brain, disrupting sleep quality, particularly when consumed in the afternoon or evening. It also stimulates the release of cortisol, the stress hormone, which over time can lead to fatigue and weakened adrenal function.

Tikhanycheva cautioned against drinking coffee on an empty stomach, as it can irritate the stomach lining and cause heartburn. She also noted that certain compounds in coffee reduce the absorption of iron, calcium, and magnesium.

“It’s important to remember that caffeine is not found only in coffee but also in black and green tea, cocoa, chocolate, and some medicines,” she emphasized, adding that monitoring total daily caffeine intake is essential.

Doctors have previously warned that coffee may be harmful to children and adolescents, as it can trigger anxiety attacks, suppress appetite, and cause stomach discomfort such as pain or acid reflux. Regular consumption may also increase the frequency of urination.