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Causes of unintentional weight lossUnintentional weight loss has many different causes.
It might be caused by a stressful event like a divorce, losing a job, or the death of a loved one. It can also be caused by malnutrition, a health condition or a combination of things.
Some causes of unintentional weight loss include:
• mental health conditions, such as depression, anxiety, eating disorders and obsessive compulsive disorder (OCD)
• problems with digestion, such as coeliac disease or irritable bowel syndrome (IBS)
• other health conditions, such as an overactive thyroid, type 2 diabetes or heart failure
Sometimes weight loss can be caused by cancer. It's important to get it checked if you're losing weight without trying."
Source:
https://www.nhs.uk/conditions/unintentional-weight-loss