You shouldn't drink coffee immediately upon waking because it can interfere with your natural cortisol spike, leading to a bigger energy crash later, increase anxiety and jitters by elevating stress hormones when they're already high, and potentially cause digestive issues on an empty stomach. Waiting 90 minutes to 2 hours allows your body's natural energy to kick in, and caffeine can then work more effectively and smoothly, preventing that afternoon slump and reducing potential discomfort, while also letting you rehydrate with water first.
There is technically nothing wrong with drinking your coffee first thing in the morning; no research proves any negative effects. These insights are simply in response to a popular theory online right now that says you should wait 90 to 120 minutes after waking up to enjoy your coffee to avoid that afternoon slump.
The 90-minute rule says you should wait at least 90 minutes from the time you wake up in order to consume caffeine, which for most people is coffee. This allows your natural cortisol levels to rise so you don't experience a crash in energy. This was popularized by Dr Andrew Huberman.
But the stimulating effects of caffeinated coffee first thing in the morning can rev up your cortisol production. Some people may welcome this extra jolt to their systems, while others may feel more anxious, jittery or irritable. “Everyone's sensitivity, or internal response, to caffeine is different,” DiMarino says.
Caffeine from coffee is rapidly absorbed into your bloodstream. As mentioned above, caffeine is absorbed even faster if it's consumed without food. This helps explain why consuming coffee on an empty stomach may lead to increased feelings of the “jitters” or other symptoms of anxiety.
Timing it for later in the morning could help extend its effects into the early afternoon, potentially countering any drop in alertness at that time. That said, there is no harm in having caffeine first thing, Dr Grandner said.
Tip: Drink lemon water at a lukewarm temperature on an empty stomach for best results.
Medical experts advise using unsweetened cocoa powder to boost heart health via powerful flavour flavanols. This addition increases nitric oxide production, which relaxes blood vessels and improves overall blood circulation.
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“Waiting until the hour after breakfast probably means that you've completed your digestion and absorption of the nutrients, and then it's safer to have your coffee,” Betts says. It's also a good idea to time your caffeine intake around tasks or exercise.
The 1-week coffee rule refers to a recommended approach to cutting out coffee, where you gradually reduce your coffee intake over a week.
The "2-hour coffee rule" suggests waiting 90 minutes to 2 hours after waking up to drink your first coffee, aligning caffeine intake with your body's natural cortisol (alertness hormone) cycle for better energy, reduced crashes, and improved efficiency, as cortisol peaks shortly after waking. While some recent research questions the necessity, many experts and users find delaying coffee allows for more effective alertness by letting natural wakefulness occur before adding stimulants, potentially building less tolerance and avoiding afternoon slumps.
Heart health
The findings suggest people who drink coffee — caffeinated or decaffeinated — between 4 a.m. to 12 p.m. were 16% less likely to die from any cause compared to people who didn't drink coffee, and 31% less likely to develop heart disease.
This delay allows cortisol to do its job without interference. Then, as your natural alertness tapers off, caffeine kicks in — giving you a genuine boost rather than a redundant jolt. For most people who wake between 6:30 and 7:30 AM, the best coffee window lands between 8:00 and 9:00 AM.
"Caffeine also increases cortisol levels," adds Gatlin. "This can help really wake us up, but it makes sense that, over time, your body might eventually adapt to produce less cortisol on its own if you drink a cup of coffee first thing every morning."
And its ingredients, which can range from sour cream to cinnamon to walnuts, make it the perfect food to combo with coffee.
Signs of bad gut health include digestive issues like bloating, gas, diarrhea, constipation, and heartburn; skin problems such as acne or eczema; mood changes like anxiety or depression; fatigue; sugar cravings; and unintentional weight changes, all stemming from an imbalance in your gut microbiome (dysbiosis). These symptoms can signal that your gut isn't processing food and eliminating waste effectively, impacting overall well-being, notes Healthdirect and GoodRx.
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Drinks rich in nitric oxide-boosting compounds, such as beetroot juice, green tea, and pomegranate juice, help open blood vessels and enhance circulation. These drinks aid in stimulating blood flow, lowering systolic blood pressure, and reducing the risk of arterial stiffness.
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The study indicates that individuals who consume an average of 3-5 cups of coffee daily may experience a significant reduction in the risk of atherosclerosis, characterized by plaque build-up in the arteries, leading to a lower risk of heart attacks.
Up to 400 milligrams (mg) of caffeine a day seems safe for most adults. That's about the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks. Keep in mind that the caffeine content in drinks varies widely.
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The natural acidity can help your body absorb minerals more efficiently especially iron. They are also a great source of vitamin C which supports collagen production which is essential for health skin, joints and connective tissues. Just squeeze a full lemon into a glass of water and enjoy it daily.