Blood
How can I tell if I've got high cortisol levels?
It's commonly known as the 'stress hormone'.
What’s the longest a human can hold their breath underwater?
Breathe in! People can hold air in their lungs for a surprising length of time.
What is holy fire disease?
And yes, it still exists today.
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Why do our veins look blue?
It's not because deoxygenated blood is blue.
New blood test can tell if cancer has spread around the body
The test could be performed at a GP practice and would help doctors prioritise patients with widespread and later stage cancer.
Blood test can accurately detect 50 types of early-stage cancer
The test is based on a type of DNA that is shed by tumours into the bloodstream.
COVID-19: Scientists discover source of life-threatening blood clots
The finding could point to therapies to prevent clots, researchers say.
AstraZeneca vaccine slightly increases risk of bleeding disorders
The risk is far lower than the risk of serious illness or death from coronavirus, researchers say.
New treatment could offer 'a new weapon in our arsenal against cancer'
Tests in the lab showed the new treatment reduced the growth of leukaemic cells and significantly prolonged the lifespan of mice with blood cancer.
NHS to trial blood test that detects over 50 early-stage cancers
Research suggests the test can identify many types that are difficult to diagnose early, such as head and neck, ovarian, pancreatic, and some blood cancers.
Why do we have different blood types?
We’ve teamed up with the folks behind BBC World Service’s CrowdScience to answer your questions on one topic - this week it's all about blood types.
Nutrient found in tea, red wine and apples could lower blood pressure
Scientists have found a significant association between the consumption of flavanol-rich foods, like apples, cocoa and nuts, and lower blood pressure.
COVID-19 | Blood test could 'identify patients at greatest risk'
The test, developed by UK researchers, detects proteins known as cytokines in the bloodstream.
Scientists discover what makes blood so tasty to mosquitoes
The findings could pave the way for a drug that changes the way humans taste to the insects.
Reality Check | Have we been treating COVID-19 wrong?
As more and more symptoms are confirmed, it becomes clearer that COVID-19 is not a normal respiratory infection. Should we approach treatment differently?
Men who have had COVD-19 ‘could save lives’ by donating blood
A man is three times more likely to give a high antibody unit of plasma than a woman, partly because men tend to be more seriously affected by COVID-19.
Delirium, brain inflammation and stroke linked to COVID-19
These neurological complications are rare, but can be severe.
Genetically modified rice could one day help keep your blood pressure down
Unlike traditional blood pressure medication, the modified rice showed no side effects.
New, non-invasive cancer test can detect one mutation in a million DNA molecules
The method involves using a personalised genetic testing approach.
Coronavirus blood trial targets hormone imbalance
Severe inflammation in the lungs, a natural response of the body to coronavirus, is thought to be behind the formation of blood clots.
Coronavirus: high blood pressure could double risk of death
Patients should not discontinue or change their normal antihypertensive treatment, scientists said.
Child receives first COVID-19 blood plasma transfusion in NHS trial
If the trial is successful, being treated with plasma from those recovered from COVID-19 could become a widespread practice in hospitals for those who are seriously ill.
Prostate cancer blood test 'faster and kinder' than traditional biopsies
Prostate cancer is the most common cancer in men in the UK.
COVID-19: More than 500 scientists from around the globe to analyse patients’ blood
The coalition is looking for biomarkers that determine how a patient will respond to the virus, which could lead to the development of targeted treatments.