Free Informative Speech on Caffeine and Its Effects

From coffee, to tea, to soda or chocolate, in the United States, adults consume an average 135 mg of caffeine every single day. While being a common part of our everyday life, caffeine is also not a substance many people know much about, making it a perfect subject for an informative speech.


On this page, you will find a free downloadable example of an informative speech on caffeine, as well as a professionally written example outline. You’ll get:

  • Examples of attention-grabbing openers, potential talking points, and helpful tips for ending lines.
  • Inspirational YouTube videos to help you practice your delivery.
  • A bibliography of resources.
Informative Speech on Caffeine

Speech Example

Want to see an example of a well-written informative speech on the subject of caffeine? We’ve provided a professionally-written example speech as a free download to inspire your own work. 

Number of words: 1,000 words
Number of pages: 6
Type: Informative
Duration: 15 minutes
Style: Casual / Informal
Download: Informative Speech on Caffeine

There are a lot more speech examples you can download. We can also write a speech for you on any topic.

Below, you will find a comprehensive example of an outline that will assist you if you want to write your speech from scratch.

Outline Example

In this section, you’ll find a ready-to-use outline for an informative speech about caffeine, including helpful examples of potential introductions, body paragraphs, and conclusions. There’s a lot of information on caffeine that you could share with your audience but remember: an informative speech should have a focus. Make sure you narrow down the focus of your speech rather than trying to communicate it all. Here are some ways you can approach the subject. 

Speech Characteristics


Topic 1# How caffeine affects your brain. 

Topic 2# Caffeine’s interactions with the body. 

Specific Purpose:

Topic 1# Educate the audience on how caffeine makes you feel more awake and other interactions it has with the brain.

Topic 2# Inform the audience of the various effects and potential contraindications of caffeine.

Central idea:

Topic 1# While many think of caffeine as “giving you energy” the actual ways it interacts with and affects your brain are very complex.

Topic 2# Caffeine has varied effects on the body depending on physical factors, medical conditions, and medications you may be taking. 

Speech Outline

  1. Introduction
    1. Attention grabber – The opening lines of your speech are meant to immediately catch the audience’s attention. Here are some examples of attention getters for an informative speech on caffeine:
      • Do you know that caffeine is the most widely used psychoactive chemical in the world?
      • Did you know that in North America, more than 80% of adults regularly consume caffeine?
      • Did you know that caffeine is the most widely consumed mind-altering drug globally?
      • Once caffeine hits your stomach, it takes about 20 minutes for you to start experiencing its stimulating effects.
      • Did you know that caffeine is the most popular drug in the United States and the least regulated one?
      • You might not expect it, but energy drinks like Monster and Red Bull contain less caffeine than a regular cup of coffee?
    2. Significance – Explain why the information you are presenting is important to the audience. For instance, you could say things like:
      • While 80% of people regularly consume caffeine, many of us don’t actually know what it does to our body and our brains.
      • Everyone’s body is different and needs to be treated as such! Knowing more about how caffeine works can help you better understand how it might affect you specifically.
      • If you’re not entirely sure of what contains caffeine or how much caffeine certain things contain, it can be easy to consume a lot more caffeine than you realize, which can be unpleasant, addictive, or even downright dangerous.
    3. Credibility – The audience needs to trust that what you are saying is true. Establishing credibility is essential, so make sure to mention ways in which you are qualified to speak on the topic. You might even want to discuss your research methods. Considerations when establishing credibility in a speech about caffeine might include:
      • Do you have any unique personal experiences related to the topic of caffeine?
      • Do you have any education, qualifications, or professional expertise on the topic of caffeine?
      • Are you a medical professional or researcher?
      • Do you work for a company that sells caffeinated products?
      • Have you done primary or secondary research on the subject of caffeine?
    4. Thesis – Your thesis statement establishes the topic of your informative speech and what aspects of the topic you’ll be focusing on. Unlike a persuasive speech, your thesis is not meant to argue a point, but instead introduce the scope of your speech and the factual information you’ll be sharing. For example:
      • Caffeine interacts with our brains in many complex ways.
      • The effects of caffeine vary significantly from person to person based on their physiology, with both positive and negative results.
    5. Preview – The preview is a roadmap of the main points you’ll be making in your informative speech. Each of these points should directly relate back to your main thesis. For example, you could say things like:
      • While caffeine does make you feel awake, you may be surprised to learn that it does not actually give you more energy. Not only that, but it has other, lesser known effects on the brain, including potential dependency and anxiety issues. However, it can also improve mental health and cognition.
      • Depending on a person’s bodily features, any medical conditions, and any medications they may be taking, they may find that caffeine interacts with their body in unexpected ways.
  2. Body

    The body of your informative speech on caffeine takes the main points you laid out in the preview and explains them further, supporting each point with two or more pieces of factual information. You could cover as many points as you like, but make sure you leave time to fully explain each point.

    1. Caffeine does not actually “give” you energy. (Provide a point in support of your thesis.)
      1. Caffeine works by blocking adenosine receptors in your brain, keeping actual adenosine from getting through. (Provide evidence that supports your point.)
      2. Adenosine is a neuromodulator. When adenosine binds to the receptors, neural activity slows down, and you feel sleepy. With caffeine blocking those receptors, the fatigue does not happen. (Provide evidence that supports your point.)
      3. Blocking the adenosine receptors is also thought to increase the activity of other neurotransmitters such as dopamine and norepinephrine, leading to increased brain stimulation and wakefulness. (Provide evidence that supports your point.)
      4. Thus, caffeine does not so much give you added energy as make you not notice how tired you are. (Provide evidence that supports your point.)
    2. Caffeine can interact strangely with many medications. (Provide a point in support of your thesis.)
      1. Patients who take stimulants for conditions such as ADHD and POTS may find that also having caffeine will compound the stimulating effects, leading to dangerously increased heart rate and high blood pressure. (Provide evidence that supports your point.)
      2. Caffeine can also have interactions with many anti-diabetic drugs. Coffee can increase blood sugar in some individuals, which is likely to counteract the effects of these drugs. (Provide evidence that supports your point.)
      3. Phenothiazines, which are used to treat serious psychiatric disorders, can bind to the tannins present in caffeinated foods and beverages, preventing the medication from working as it should. (Provide evidence that supports your point.)
  3. Conclusion

    It’s time to wrap up your speech while restating your points and central thesis. The conclusion should contain three parts:

    1. Summary – Briefly remind the listeners of the arguments you’ve made and why they should agree with your position.
      • Caffeine has a myriad of effects on your brain, not only preventing you from noticing fatigue, but also being potentially habit-forming, with both positive and negative effects on mental health, and even long-term potential benefits for cognition.
      • Caffeine can interact with one’s physiology in unexpected ways, with everything from one’s physical features, their medical conditions, and their medications all potentially contributing to unique interactions with the drug.
    2. Unique ending/ Audience challenge – End your speech with a powerful closing thought or recommend a course of action.
      • I’m not saying that you should never have caffeine. But the next time you’re pouring yourself your 4th cup of coffee in a day, I would suggest at least thinking about what you now know you’re doing to your body.
      • It’s interesting to think about how common a part of everyday life caffeine is when it is, after all, an actual drug. Think about that as you go on with the rest of your day, and especially when you wake up tomorrow and go straight for that first cup of coffee. Will it change how you feel about your caffeine habits?
    3. Thank the audience for listening.
      • Thank you for your energetic attention today!

Youtube Examples

After your speech is written, you still have to plan your performance. You want to make sure you deliver the information in a compelling way that keeps your audience engaged. Below, we’ve compiled some video examples of informative speeches about caffeine to help inspire you.

This engaging TED Ed animation informs viewers about the science of caffeine in an easy-to-digest way.

Asher Yaron speaks at TedX about the history of coffee.

This informative animation from Science Insider summarizes how caffeine affects your brain in an easy two-minute format.

Works Cited


Beverage caffeine intakes in the US – ScienceDirect

45 Alarming Statistics on Americans’ Caffeine Consumption –

Caffeine: America’s Most Popular Drug

Caffeine | The Nutrition Source | Harvard TH Chan School of Public Health 

Danger: Don’t mix these meds with coffee | MDLinx

Cite this article as: Jim Peterson, "Free Informative Speech on Caffeine and Its Effects," in My Speech Class, April 27, 2022,