Fitness
What Is the Immune System, and How Does It Work?
Through evolution, we’ve gained an entire arsenal for fighting off potentially harmful microbes of all sorts.
Fitness1140 articles archived since 1845
Fitness
Nutrition, Immunity and a Global Pandemic
The COVID-19 pandemic has focused attention on the importance of having a well-functioning immune system.
Fitness
Why Are People with Obesity More Vulnerable to COVID?
Chronic inflammation and immune breakdown appear to be key reasons
Fitness
Gut Reactions: Microbes in the Digestive Tract Influence COVID Severity
Our resident bacteria help regulate the immune system and response to infections
Fitness
Can Vitamin D Help Protect against COVID?
Some studies suggest an impact, particularly for those who are vitamin-deficient. But for now, the jury is out
Neurology
Could Mitochondria Be the Key to a Healthy Brain?
Some researchers suspect these bacterial ancestors living within our cells may contribute to a wide range of neurological and psychiatric disorders
Fitness
Decoded: What Are Neurons?
You have 86 billion of them inside you, but do you understand how hard it was for us to learn that?
Fitness
Hormone Highs and Lows Follow a Seasonal Pattern
A newly discovered internal body clock creates annual peaks and valleys
Fitness
The Global Iron-Deficiency Crisis
Some two billion people don’t get enough of this essential mineral in their diet
Fitness
Why Race Matters in Personalized Health Care
Achieving better, more equitable treatments requires looking at multiple factors that affect populations differently, including genetic variations
Fitness
Our Bodies Replace Billions of Cells Every Day
Blood and the gut dominate cell turnover
Fitness
Is Estrogen Deficiency Really a Thing?
The catchall term plays into a cultural notion that estrogen is what makes a woman a woman
Fitness
Reproductive Problems in Both Men and Women Are Rising at an Alarming Rate
A likely culprit is hormone-disrupting chemicals
Public Health
Is 70 Really the New 60?
People are aging better but not across the board. Education makes a dramatic difference
Fitness
Eating Turkey Does Not Really Make You Sleepy
Don't blame the tryptophan in your Thanksgiving turkey. The post-dinner drowsiness probably results from carbs and alcohol
Fitness
A New Cell Map of the Human Heart
Scientists have created an atlas of cardiac cells in six regions that could help chart what goes awry in heart disease
Policy
Election Science Stakes: Technology
We wrap up our preelection series with Scientific American senior editor Jen Schwartz, who talks about the possible effects of the election results on technology development and use.&..
Fitness
Taking Early Cancer Detection to the Next Level
The genomic revolution gives us an opportunity to bend the mortality curve
Public Health
Election Science Stakes: Medicine and Public Health
Scientific American’s senior medicine editor Josh Fischman talks about issues in medicine and public health that will be affected by this election.
Medicine
Discovery of Hepatitis C Snags Nobel Prize in Medicine
Harvey J. Alter, Michael Houghton and Charles M. Rice share the award for identifying the virus behind the blood-borne liver disease
