Researchers say a simple blood test could one day help doctors detect depression earlier by tracking changes in the body’s immune cells.
Many people live with heavy thoughts for years without fully understanding what they are experiencing.
Others struggle with emotional exhaustion without ever receiving a proper diagnosis. That is one reason scientists have spent years searching for something psychiatry still lacks: a physical way to measure depression.
Now, new research from New York University suggests the answer may eventually be found in an ordinary blood sample.
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Surprising findings
In the study, researchers focused on specific white blood cells known as monocytes, which play an important role in the immune system.
They discovered that faster biological aging in these cells was closely connected to several emotional symptoms associated with depression.
The research involved 440 women, both with and without HIV, with scientists comparing blood samples to participants’ mental health assessments.
The strongest connection appeared in people experiencing emotional symptoms such as hopelessness, emotional numbness and loss of pleasure rather than physical symptoms like fatigue or sleep problems.
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Why researchers are paying attention
Today, depression is mainly diagnosed through conversations, questionnaires and self-reported symptoms. There is still no biological test capable of confirming the condition early or objectively.
Researchers believe the findings could eventually help doctors identify mental health conditions sooner and create more personalised treatment plans in the future.
- Scientists studied the aging of immune cells
- The study included 440 women
- Emotional symptoms showed the clearest biological link
- More research is still needed
The researchers stressed that the blood test is not ready for hospitals or clinics yet, but they believe the findings represent another step toward more precise mental health care, reports Science Daily.
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