Why am I losing weight without trying?
Last updated September 3, 2026.
Losing 5%+ of body weight over 6-12 months without trying deserves a workup - thyroid, diabetes, depression, gut absorption problems, and cancer are the cause families doctors check.
What to do
- Quantify it - how much weight, over how long, on what scale.
- List the companions - racing heart, thirst, low mood, gut changes, night sweats.
- Book the workup - thyroid, glucose, and blood counts are the usual first tests.
- Do not delay past 50 - or with fatigue, night sweats, or any bleeding, per MedlinePlus.
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