Coffee culture

How to Solve Coffee-Induced Hand Tremors, Facial Flushing, and Heart Palpitations? What's the Ideal Coffee Intake at Once?

Published: 2026-01-27 Author: FrontStreet Coffee
Last Updated: 2026/01/27, Professional coffee knowledge exchange. For more coffee bean information, please follow Coffee Workshop (WeChat official account: cafe_style). Introduction: In many people's daily lives, it has become impossible to go a day without coffee. You may have heard that drinking too much coffee can make you intoxicated. Some sensitive individuals might experience facial warmth and flushing after just one cup of coffee. A morning cup of coffee always awakens vitality and energy.

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For more coffee bean information, please follow Coffee Workshop (WeChat public account: cafe_style)

Introduction

In many people's daily lives, it has become impossible to go a day without coffee.

You may have heard that drinking too much coffee can make people "drunk." Some sensitive individuals might experience facial flushing and redness after just one cup of coffee.

Person enjoying morning coffee

A cup of coffee every morning always awakens a vibrant and energetic day.

Coffee can make people feel refreshed and can enhance attention, comprehension, and memory in a short period.

This is one of the reasons why many people can't get enough of it.

When caffeine is ingested, it is rapidly absorbed by the gastrointestinal tract into the bloodstream and transported throughout the body, binding to receptors responsible for neural excitement. Therefore, caffeine has the effect of stimulating the central nervous system.

Coffee affecting central nervous system

Feeling Heart Palpitations from Coffee?

Reviewing research materials shows that caffeine acts on the human body as a stimulant through the CNS (central nervous system), enhancing alertness and energy.

This proves that "individual" tolerance varies.

As the duration of coffee consumption extends, the human body develops tolerance to caffeine.

Caffeine promotes accelerated blood circulation, so some first-time coffee drinkers or sensitive individuals may experience facial flushing and warmth after consumption.

The Scientific Explanation

Here is the detailed scientific analysis:

Caffeine has the ability to increase the production of adrenaline and glucagon, hormones that can cause the release of glycogen from the liver and obtain energy from fat deposits.

This, in turn, raises blood sugar and insulin levels while reducing cellular sensitivity to insulin.

If we observe carefully, we can infer that the reduced sensitivity to insulin induced by caffeine is due to the increase of free fatty acids in blood circulation.

Scientific diagram showing caffeine effects

Translation from the Editor

If you drink large amounts of coffee in a short period, there is indeed the possibility of "caffeine poisoning," mainly manifested as heart palpitations, rapid heart rate, convulsions, etc.

Moderation, moderation, moderation.

Everyone's metabolism of caffeine varies slowly.

Some people, after drinking coffee, have caffeine staying in their bodies longer than ordinary people.

Drinking just a little bit might achieve the same effect as others drinking many cups of coffee.

Coffee measuring and consumption

Analyzing the Issue

If we analyze carefully, the issue of "coffee causing heart palpitations" is not difficult to understand. In reality, this problem targets two different groups of people.

1. People like the editor who work in the coffee industry can drink several cups of coffee daily without any physical issues. However, when doing large-scale coffee cupping or attending coffee exhibitions where they have to drink large amounts of coffee throughout the day, they may also experience heart palpitations, dizziness, and a state similar to being drunk.

2. Sensitive individuals who experience heart palpitations from just one cup, or even from just a few sips that can affect them for half a day.

Given the significant differences between these two groups, the same explanation cannot be applied to both~

Healthy adults should not consume more than 210-400mg of caffeine daily.

According to this amount, drinking one or two cups daily is completely fine~

Moderate coffee consumption

If you belong to the group with strong reactions, you should control your coffee intake!

It remains that eternal saying: "Dear friends, while coffee is good, don't be greedy!"

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