Human heart
Latest about Heart & Circulation
![Blood sugar finger prick.](https://cdn.mos.cms.futurecdn.net/khmSRp9EZHnhu3spMeZkrB-320-80.jpg)
Insulin resistance: Risk factor for heart disease and diabetes
By Tia Ghose, Natalie Grover published
Reference Insulin resistance is a condition where the body's cells don't properly respond to the hormone insulin, which tells cells to take in blood sugar and use it for fuel.
![Close up of drink can tops.](https://cdn.mos.cms.futurecdn.net/a8dymSPvoryVicrKSHXCuU-320-80.jpg)
Man's energy drink habit lands him in the hospital with heart failure
By Rachael Rettner published
The findings add to a growing body of evidence linking energy drink consumption with heart problems.
![close-up of a patch of psilocybin mushrooms](https://cdn.mos.cms.futurecdn.net/hiP2ud53Apg2xNB6uZbNe7-320-80.jpg)
'Magic mushrooms' grow in man's blood after injection with shroom tea
By Nicoletta Lanese published
The man spent 22 days in the hospital with a severe infection.
![AA battery on a white background.](https://cdn.mos.cms.futurecdn.net/b2b6PUbgtDcSYwSvf9nfuh-320-80.jpg)
Man's 'heart attack' was really side effect from swallowed battery
By Ashley P. Taylor published
Whether or not it affects the heart, eating batteries is dangerous.
![Man doing a forearm stretch.](https://cdn.mos.cms.futurecdn.net/zygkYDEsNWkb7xgcnPF5JY-320-80.jpg)
More humans are growing an extra blood vessel in our arm that 'feeds' our hands, study shows
By Mike McRae published
Scientists have found an artery that temporarily runs down the center of our forearms while we're still in the womb isn't vanishing as often as it used to.
![A jar of "V8" male enhancement supplements, which contain blue tablets that closely resemble prescription Viagra.](https://cdn.mos.cms.futurecdn.net/oPgqY6EhL6QTdpjppoMD9K-320-80.jpg)
Tainted sexual enhancement supplements linked with dangerously low blood sugar in 17 men
By Rachael Rettner published
The outbreak occurred in Virginia men who bought the supplement from local convenient stores.
![A person checking their heart rate with a smartwatch.](https://cdn.mos.cms.futurecdn.net/a7V9msx4eoVaFCLWaDTAMG-320-80.jpg)
A 'normal' resting heart rate may not be so normal after all
By Joshua A. Krisch published
A new study finds that resting heart rate can vary between individuals by up to 70 beats per minute, calling into question how physicians use one of the most fundamental vital signs.
![A close up look (illustration) at healthy red blood cells. People with anemia have low-iron in their blood, which can be a result of low levels of red blood cells.](https://cdn.mos.cms.futurecdn.net/HrGbBMBGCeyqPAbbHRSr9a-320-80.jpg)
Anemia: Causes, symptoms and treatment
By Cari Nierenberg published
Anemia is a common condition that may be caused by a shortage of iron, abnormal bleeding, infections, cancer or gastrointestinal problems.
![Stephan Moll and a team of NASA doctors prescribed blood clot treatment for an astronaut at the International Space Station.](https://cdn.mos.cms.futurecdn.net/TwuEevddsyYybGAjqARTW8-320-80.jpg)
An Astronaut Got a Blood Clot in Space. Here's How Doctors on Earth Fixed It.
By Leonard David published
An unidentified astronaut aboard the International Space Station had a deep vein thrombosis — or blood clot — in the jugular vein of their neck, according to a new case study.
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