Why Does Coffee Energize While Tea Relaxes?

Coffee and tea are two popular beverages that affect the body differently. Coffee provides an energy boost, while tea, on the contrary, promotes relaxation. Why does this happen? In this article, we explain why coffee stimulates and tea soothes.

Caffeine in Coffee and Tea: What’s the Difference?

Caffeine is the main active ingredient responsible for the stimulating effect of these drinks. However, its impact on the body varies depending on the source:

• In coffee, caffeine is in a free form, quickly absorbed into the bloodstream, and reaches the brain within 10–15 minutes. This triggers adrenaline production, increases heart rate, and raises blood pressure—resulting in a surge of energy.
• In tea, caffeine is bound to tannins (tannic compounds), which slows down its release. Instead of a sudden energy spike, a person experiences a gradual and longer-lasting effect.

Why Does Coffee Energize?

Coffee boosts energy thanks to caffeine—a natural stimulant that affects the central nervous system. Let’s break down how it works.

Blocking Adenosine

The brain contains a neurotransmitter called adenosine, which accumulates throughout the day and causes feelings of tiredness. Caffeine has a similar structure to adenosine and “occupies” its receptors, preventing it from inducing drowsiness. As a result, the brain remains active for longer, and fatigue subsides.

Stimulating Adrenaline Production

Caffeine activates the sympathetic nervous system, leading to an adrenaline surge—the hormone responsible for alertness and energy. As a result:

• Heart rate increases.
• Blood pressure rises.
• Blood circulation to the brain and muscles improves.
• The body enters a state of “readiness for action.”

Increasing Dopamine Levels

Caffeine boosts dopamine levels—the “happiness and motivation” hormone. This makes a person feel more energetic, improves mood, and enhances concentration.

Accelerating Metabolism

Caffeine temporarily increases metabolic rate by 3–11%, further contributing to an energy boost and wakefulness.

How Fast Does Coffee Work?

The effect begins within 10–15 minutes after consumption and peaks within 30–60 minutes. The stimulating effect lasts between 3 to 6 hours, depending on individual metabolism.

Why Does Tea Relax?

Tea, especially black and green varieties, affects the body differently than coffee: it does not cause a sharp burst of energy but rather promotes relaxation and stress relief. This is due to its composition and the slow release of caffeine.

L-Theanine – The Key Relaxing Component

Tea contains L-theanine—an amino acid that:

• Reduces stress and anxiety, promoting relaxation.
• Increases serotonin and dopamine levels, enhancing mood.
• Moderates caffeine’s stimulating effect, preventing jitters and energy crashes.

L-theanine influences the brain by boosting alpha waves, which are associated with a state of calm wakefulness and meditation.

Caffeine in Tea is Released Slowly

Although tea also contains caffeine, its effect is not as sharp as that of coffee. This is because tannins slow down caffeine absorption. As a result:

• There is no sudden energy surge like with coffee.
• The effect is smooth and prolonged—rather than intense stimulation, it promotes a state of relaxed focus.

The Calming Ritual

The process of brewing and slowly drinking tea itself is relaxing. The warm beverage, its aroma, and the traditions of tea ceremonies help reduce stress and induce a peaceful state.

Different Types of Tea Have Different Effects

• Black tea – mildly energizes but contains high levels of tannins, making the effect gentle.
• Green tea – refreshes but, thanks to L-theanine, does not cause nervousness.
• Herbal teas (chamomile, mint, lemon balm, lavender) – contain no caffeine and provide a strong calming effect.

Conclusion

Coffee and tea affect the body differently due to their compositions. Coffee is a quick energy booster, while tea is a gentle, relaxing drink. The choice depends on the situation: if you need an energy surge, coffee is the best option; if you want to relax, tea is the better choice.

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