Coffee is one of the world’s most widely consumed drinks, but health experts are warning that one common morning habit could be quietly affecting your digestive system.
A naturopathic and functional medicine doctor has raised concerns about the way many people start their day with caffeine before hydrating their bodies after a night’s sleep.
The morning coffee habit under scrutiny
According to Dr. Pedi, a U.S.-based naturopathic and functional medicine doctor, drinking coffee or tea first thing in the morning may contribute to dehydration-related constipation in some people.
He explained:
“If you poop only after eating coffee and tea in the mornings, it could be a sign you’re chronically constipated and can be making things worse.”
He says the issue comes down to hydration levels after sleep, when the body naturally loses fluids overnight.
How coffee may affect digestion
Dr. Pedi argues that starting the day with caffeine can worsen dehydration, which may in turn affect bowel movements.
He added:
“Starting your day with coffee or tea can be making you more dehydrated as you’ve gone overnight without any water.”
According to his explanation, this dehydration may cause the colon to draw water from stool to compensate, potentially making it harder and more difficult to pass.
He also warned that black tea could have a similar effect due to tannins, which may further slow digestion in some individuals.
What he recommends instead
Rather than immediately reaching for coffee, the doctor suggests a simple change in morning routine.
He advises:
“Start your day with a big glass of water before any coffee or tea.”
He also emphasizes increasing fiber intake through whole foods such as fruits, vegetables, and legumes, aiming for around 25–30 grams per day.
In addition, he encourages light physical activity after meals to support digestion and overall gut movement.
How much coffee is too much?
While coffee is not inherently harmful for most people, experts warn that excessive caffeine intake can lead to side effects such as anxiety, restlessness, sleep disruption, and digestive issues.
The Mayo Clinic recommends limiting caffeine intake to about 400 milligrams per day, which is roughly equivalent to four cups of brewed coffee.
Final thoughts
Coffee remains a daily ritual for billions of people worldwide, and for many, it provides both comfort and energy. However, experts suggest that small changes—like drinking water before caffeine—may help support better digestion and long-term gut health.
As with most dietary habits, moderation and timing may be just as important as the drink itself.
