Coffee has become an integral part of modern life, and for good reason. It boosts alertness, increases productivity, and, when consumed appropriately, has been shown to offer various health benefits. However, many people are unaware of the optimal time to drink coffee to avoid negative consequences on their bodies. In fact, consuming coffee at the wrong time can disrupt your sleep, affect your blood sugar levels, and even impact your cardiovascular health.
Drinking Coffee First Thing in the Morning: Weighing the Pros and Cons
Many individuals rely on a cup of coffee as soon as they wake up to quickly boost their alertness. However, health experts suggest that this habit may do more harm than good. After a long night’s rest, your body is in a fasting state, and cortisol, the stress hormone, typically peaks within 30-45 minutes of waking up. Drinking coffee at this time further increases cortisol levels, leading to feelings of stress, anxiety, skin breakouts, and hormonal imbalances.

Additionally, coffee stimulates the digestive system and adrenal glands when your stomach is empty, potentially causing a sudden spike and subsequent crash in blood sugar levels. This can leave you feeling fatigued, lethargic, and unable to focus for the rest of the day.
Afternoon Coffee: Considering the Impact on Sleep
According to Dr. Poonam Desai, an emergency medicine specialist in New York, consuming coffee after noon can significantly affect your sleep quality. Caffeine’s half-life in the body is approximately six hours, so if you have a cup of coffee at 2 p.m., a considerable amount of caffeine will still be present in your system at 8 p.m.
Chronic sleep deprivation not only leads to fatigue but also increases the risk of cardiovascular disease, hypertension, and stroke. A 2015 study published in Science Translational Medicine found that drinking coffee within three hours of bedtime can delay your body’s internal clock by up to 40 minutes, making it harder to fall into a deep sleep.
So, When Is the Best Time to Drink Coffee?
The golden time to drink coffee is between 9:30 a.m. and 11:30 a.m. During this period, cortisol levels start to decline, allowing caffeine to maximize its effects without exacerbating stress hormones. Additionally, having coffee after breakfast means it won’t irritate your stomach or negatively impact your blood sugar levels.

Important Considerations for Healthy Coffee Consumption
- Opt for pure coffee: Avoid coffee blends or those containing chemical additives. Pure coffee provides the desired effects without damaging your liver, kidneys, or digestive system.
- Limit sugar and dairy: If you’re watching your weight or concerned about cardiovascular health, minimize the addition of sugar and condensed milk in your coffee. Consider using sugar substitutes or unsweetened plant-based milk alternatives instead.
- Avoid drinking coffee on an empty stomach: As mentioned, caffeine stimulates the stomach, and consuming it before eating can lead to stomach aches and digestive issues.
- Don’t overdo it: While coffee has benefits, it’s still a stimulant. Limit your intake to 1-2 cups per day, aiming for no more than 400mg of caffeine, to avoid impacting your nervous and cardiovascular systems.
Coffee is a wonderful beverage when consumed at the right time and in the right way. Drinking coffee immediately upon waking or in the late afternoon can have unforeseen health consequences. Adjust your coffee-drinking habits to take advantage of its benefits, from improved work performance and mental clarity to comprehensive health protection.