Daniela Hernandez, Wall Street Journal

Daniela Hernandez

Wall Street Journal

New York, NY, United States

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Past articles by Daniela:

As Psychedelics Become More Mainstream, Here’s What You Need to Know

This copy is for your personal, non-commercial use only. Distribution and use of this material are governed by our Subscriber Agreement and by copyright law. For non-personal use or to order multiple copies, please contact Dow Jones Reprints at 1-800-843-0008 or visit www.djreprints.com. → Read More

Ozempic’s Other Unexpected Side Effect Is All in Your Head

Diabetes drugs could become an effective way to treat behavioral issues and addiction. WSJ’s Daniela Hernandez breaks down the science on how they work and how → Read More

The Brain Science of Aggression and Why Lashing Out Can Feel Good

Nearly one in four people surveyed in Gallup's latest Global Emotions Report said they’d recently felt anger. WSJ’s Daniela Hernandez explains the neuroscience → Read More

Metformin and Autophagy: The Cellular Recycling Process Behind Aging

Metformin may have anti-aging properties because of a cellular recycling process called autophagy. WSJ’s Daniela Hernandez explains what autophagy is and why bo → Read More

The Science Behind Controversial New Weight Loss Drugs Like Ozempic

Some drugs initially approved to treat Type 2 diabetes are now being used for cosmetic weight loss. WSJ’s Daniela Hernandez explains how they work, their side e → Read More

The Neuroscience of Why Spicy Foods Can Make Us Feel Great – or Terrible

Chili peppers contain a chemical compound called capsaicin that activates pain receptors in the mouth. But why do we perceive it as hot? WSJ’s Daniela Hernandez → Read More

High-Tech Smell Sensors Aim to Sniff Out Disease, Explosives—and Even Moods

Advances in artificial intelligence, bioengineering and synthetic biology are powering a new breed of odor sensors, some using living cells → Read More

Covid-19 Reinfections: What You Need to Know

If you’ve had Covid before, why can you get it again? WSJ’s Daniela Hernandez explains what the possibility of reinfections means for the future of public-healt → Read More

Intermittent Fasting May Have Cognitive Benefits, New Research Shows

Emerging research suggests intermittent fasting might have benefits for brain health and cognition. WSJ’s Daniela Hernandez breaks down what we know about how i → Read More

Mysterious T-Cells Are at the Center of The Second Covid Booster Debate

As fourth doses of Covid vaccines roll out, some are questioning whether the general population needs them. At the center of this debate are mysterious T-cells. → Read More

T-Rex Could Actually Be Three Separate Dinosaur Species, Study Argues

A group of paleontologists say there’s evidence the iconic Tyrannosaurus Rex could actually be three different species, based on an analysis of the dinosaur’s a → Read More

BA.2 Omicron: What to Know About the New Covid Variant

The new BA.2 Omicron variant has public health experts worried about potential new Covid-19 surges. WSJ’s Daniela Hernandez explains what you need to know about → Read More

GMO Tomatoes Could Be Returning After 25 Years. Will People Eat Them?

British scientists have developed a genetically modified purple tomato that is packed with antioxidants, and it could be approved for sale in the U.S. this year → Read More

Nuclear Radiation’s Effects on the Human Body, Explained

Nuclear radiation exposure concerns have been mounting following Russian attacks on Ukrainian nuclear power plants. WSJ’s Daniela Hernandez explores what scient → Read More

Block on Blood-Plasma Donors From Mexico Threatens Supplies

Pharmaceutical companies and U.S. officials are fighting over whether to allow people to cross from Mexico to be paid for giving blood plasma, a critical ingredient in treatments for some diseases. → Read More

Here’s How Viral Death-Defying Videos Make You Wince

Why do we feel anxious observing a daredevil hang from a rooftop ledge? WSJ’s Daniela Hernandez explains what exactly happens in your brain with this phenomenon → Read More

How Do You Teach a Goldfish to Drive? First You Need a Vehicle

Neuroscientists put fish and rats in the driver’s seat in experiments intended to help learn how brains adapt to change → Read More

Ask WSJ: What to Know About the New Omicron Covid-19 Variant

Since its discovery was announced last week, the Omicron variant of the coronavirus has rattled markets and set scientists racing to find out how it differs from other strains. Join WSJ's Health Business editor Jonathan Rockoff in conversation with reporters Daniela Hernandez and Gabriele Steinhauser about the Omicron variant, its potential response to vaccines, treatments and past infection,… → Read More

How Mexican Gymnasts Defied the Odds and Leapt Into Olympic History at the Tokyo Games

Mexican gymnasts often don’t have the same resources available to their American counterparts, making it more difficult for them to train and compete on the world’s stage. → Read More

The Dystopian Quarantines That Crushed Olympic Dreams

Isolation exacerbated the devastation felt by athletes who tested positive for Covid-19 in Tokyo. One athlete built a companion named Bob for company. → Read More