What Happens to Your Body Minute by Minute After Drinking a Cup of Coffee?

Drinking a cup of coffee in the morning is an essential part of the daily routine for many people, but have you ever wondered what exactly happens inside your body after the first sip, minute by minute?

After 10 Minutes

Dr. Duane Mellor from the British Dietetic Association states that caffeine begins to appear in the blood about 10 minutes after drinking coffee, reflecting the speed at which caffeine is absorbed into the bloodstream through the digestive system. Some caffeine can be absorbed in the mouth and stomach, but most of it is absorbed in the small intestine. According to the British “Daily Mail” website, one feels an increase in energy because caffeine prevents the body from reacting to adenosine, a chemical that causes feelings of tiredness.

After 20 Minutes

Dr. Mellor explains that caffeine blocking adenosine receptors not only enhances alertness but also leads to a rise in blood pressure 20 minutes after drinking coffee, due to the constriction of blood vessels and increased heart rate. He warns that drinking more than four cups of coffee daily may lead to long-term increases in blood pressure.

After 45 Minutes

The effects of caffeine peak 45 minutes after drinking coffee, enhancing concentration and memory, but excessive coffee consumption can lead to feelings of tension and anxiety. The National Health Service (NHS) guidelines state that 400 mg of caffeine per day is safe for adults, equivalent to four regular cups, and pregnant women and teenagers are advised to reduce their intake.

After 60 Minutes

Dr. Mellor notes that caffeine causes a diuretic effect, as it inhibits the production of the anti-diuretic hormone (ADH), increasing the amount of urine without causing dehydration if consumed in moderate amounts. A 2014 study showed that moderate coffee consumption does not cause dehydration but can help hydrate the body.

After 90 Minutes

The time it takes to metabolize caffeine varies from person to person, but for most people, the stimulating effect of caffeine starts to fade after one to two hours of consumption, and about 50% of the caffeine remains in the body six hours after consumption. It is advisable to avoid drinking coffee at least eight hours before bedtime to avoid its effects on sleep.

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