22 explainers
Health Evidence and Medicine
Evidence-minded health explainers covering medicine, sleep, supplements, vaccines, microplastics, placebo effects, and everyday health claims.
The goal is to separate useful context from overconfident wellness advice, with plain-language explanations of what evidence can and cannot say.
Use this page as a reading path: start with the core explainer, then follow the related guides to understand the key terms, practical tradeoffs, and open questions.
Questions this guide answers
- What does the evidence actually show?
- Which health claims are overstated?
- When should a reader seek professional advice?
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What Are GLP-1 Drugs? Benefits, Risks, and How They Work
What are GLP-1 drugs? A source-led explainer on how medicines such as Ozempic, Wegovy, Mounjaro, and Zepbound work, plus benefits and risks.
Microplastics in Humans: What Do They Mean for Health?
What do microplastics in humans mean for health? Learn what researchers have detected, what risks remain uncertain, and what evidence can say.
Why Does Music Give You Chills? The Science of Frisson
Why does music give you chills? Learn what frisson is, how the brain responds to musical surprise, and why some people feel it more often.
How Do Credit Scores Work? Factors, Myths, and Practical Steps
Learn how credit scoring models use report data, why you have many scores, which factors usually matter, and how to check and improve your credit safely.
How Does Antibiotic Resistance Develop?
How does antibiotic resistance develop? Learn how bacteria evolve under antibiotic pressure and why the problem involves patients, clinicians, farming, and public health.
Can You See the Great Wall From Space? The Answer Explained
Can you see the Great Wall of China from space? Learn where the claim came from, why it persists, and what visibility physics actually says.
Did Humans Evolve to Run Long Distances?
Did humans evolve for endurance running? Explore the anatomy, physiology, and evolutionary evidence behind humans' unusual long-distance ability.
Is the Five-Second Rule Real? What Research Actually Found
Is the five-second rule real? Learn what food-safety research says about bacteria transfer, surface type, moisture, and time.
How Do Vaccines Work? Immune Memory Explained
How do vaccines work? Learn how vaccination helps the immune system recognize threats, build memory, and respond more effectively later.
Why Do We Yawn? Causes, Contagion, and What Science Knows
Why do people yawn? Learn why the low-oxygen story does not hold up, what may trigger contagious yawning, and why the function remains unsettled.
What Is the Placebo Effect? Benefits and Limits
Understand how treatment expectations can influence symptoms, why feeling better differs from disease improvement, and what placebo studies show.
How Does General Anesthesia Work? What Doctors Know
How does general anesthesia work? Learn what it does to the brain, why it causes unconsciousness, and what scientists still do not know.
Does Reading in Dim Light Ruin Your Eyes?
Does reading in dim light ruin your eyes? Learn what eye strain can do, what it cannot do, and why this parental warning persists.
What Does Creatine Do? Benefits, Evidence, and Limits
What does creatine do? Learn what research supports, who may benefit, common misunderstandings, and where evidence is less certain.
Do You Need Eight Glasses of Water a Day?
Do you need eight glasses of water a day? Trace the origin of the hydration rule and learn why individual water needs are not one-size-fits-all.
What Is Sleep Debt? Can You Catch Up on Sleep?
What is sleep debt? Learn what sleep restriction does, how recovery works, and why weekend sleep may not fully offset repeated short nights.
Do Magnesium Supplements Work? Evidence and Limits
Do magnesium supplements work? Review the evidence for common claims, who may benefit, and why popular advice often overstates the case.
Was Napoleon Short? The Origin of the Height Myth
Was Napoleon short? Learn how French and British measurements, cartoons, and repetition created one of history's most persistent myths.
How Long Is a Goldfish's Memory? The Myth Explained
How long is a goldfish's memory? Learn why the three-second myth is false and what studies suggest about goldfish learning and recall.
Does Sugar Cause Hyperactivity in Children?
Does sugar cause hyperactivity in children? Learn what controlled research shows, why the belief persists, and what else can affect behavior.
Do We Only Use 10% of Our Brain? The Myth Explained
Do we only use 10% of our brain? Learn why the claim is false, where it came from, and what brain imaging and injury evidence show.
Do Vitamin D Supplements Work? Evidence and Limits
Do vitamin D supplements work? A source-led look at deficiency, common claims, evidence limits, and when individual medical advice matters.