Morning coffee causing diabetes and fatty liver? AIIMS doctor warns of 7 coffee mistakes that could harm your health
An AIIMS-trained doctor warns that common coffee habits can harm your gut and liver. Drinking coffee on an empty stomach, excessive sugar, and overconsumption of caffeine can lead to various health issues. Late-night consumption and using artifici...
By ET Online | Updated:
If your day doesn’t start without a cup of coffee, you might want to slow down and read this first. AIIMS-trained doctor Dr Saurabh Sethi took to Instagram to warn that some common coffee habits could be silently harming your gut and liver. While coffee itself can be a powerful health booster, the way you drink it can turn it into a daily dose of damage.
Dr Sethi explained that drinking coffee on an empty stomach is one of the worst habits. It raises stomach acid levels and can cause reflux, nausea, or even gastritis when done regularly. Adding sugar, creamers, or flavoured syrups doesn’t help either — one sweetened latte can pack up to 50 grams of sugar, fueling issues like fatty liver and diabetes.
Many people also overdo caffeine. Consuming more than four cups a day — or over 400 mg of caffeine — can spike cortisol levels, irritate the gut, and trigger palpitations or anxiety. And if you’re sipping coffee late at night, you’re sabotaging your sleep without realising it. Caffeine stays in the system for hours, delaying deep sleep that’s crucial for liver repair and detoxification.
Another common mistake, according to Dr Sethi, is masking fatigue with coffee instead of fixing poor sleep. It might feel like a quick fix, but over time, it worsens burnout, brain fog, and gut stress. Even “zero calorie” sweeteners aren’t safe substitutes. Artificial options like sucralose and aspartame can mess with gut microbes and digestion.
Dr Sethi explained that drinking coffee on an empty stomach is one of the worst habits. It raises stomach acid levels and can cause reflux, nausea, or even gastritis when done regularly. Adding sugar, creamers, or flavoured syrups doesn’t help either — one sweetened latte can pack up to 50 grams of sugar, fueling issues like fatty liver and diabetes.
Many people also overdo caffeine. Consuming more than four cups a day — or over 400 mg of caffeine — can spike cortisol levels, irritate the gut, and trigger palpitations or anxiety. And if you’re sipping coffee late at night, you’re sabotaging your sleep without realising it. Caffeine stays in the system for hours, delaying deep sleep that’s crucial for liver repair and detoxification.
Another common mistake, according to Dr Sethi, is masking fatigue with coffee instead of fixing poor sleep. It might feel like a quick fix, but over time, it worsens burnout, brain fog, and gut stress. Even “zero calorie” sweeteners aren’t safe substitutes. Artificial options like sucralose and aspartame can mess with gut microbes and digestion.
Finally, Dr Sethi busted a popular myth — that light roast coffee is gentler. In reality, dark roast coffee is less acidic and may actually be easier on those prone to reflux or GERD. As Dr Sethi summed it up, coffee can be medicine or misery — it all depends on how you drink it.
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Is black coffee good?
Instead, Dr Saurabh Sethi advises drinking black coffee and shares the science-backed benefits. Dr Saurabh Sethi also encouraged switching to plain black coffee, highlighting its many science-backed benefits. He explained that black coffee can protect the liver by lowering the risk of fatty liver, fibrosis, and cirrhosis, and has even been linked to reduced chances of liver cancer. Regular coffee drinkers also show a lower risk of Alzheimer’s and Parkinson’s diseases, thanks to its brain-protective compounds.Black coffee supports blood sugar control by improving insulin sensitivity, reducing the risk of type 2 diabetes. It’s also rich in antioxidants and polyphenols that help fight inflammation and oxidative stress. Moderate coffee consumption, about two to four cups a day, has been tied to better heart health, lower stroke risk, and improved mood, focus, and energy levels. Studies have even linked it to longer life expectancy — proof that when consumed right, coffee truly can be a daily health ally.
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