Health guide
Unexplained weight gain: the tests worth checking
Putting on weight despite no real change in how you eat or move can be frustrating, and it sometimes has a medical driver rather than a lifestyle one. An underactive thyroid is the classic example, along with insulin resistance and shifts in your cholesterol. A few simple tests help separate a treatable cause from ordinary lifestyle factors.
Reviewed by Dr. Vishal Singh, Lab Director
Signs your weight gain is worth testing
- Weight gain without eating more than usual
- Feeling cold, tired, or sluggish
- Increased thirst or hunger
- Brain fog or low energy
- Puffiness, especially in the face
- Trouble losing weight despite real effort
The usual testable causes
An underactive thyroid (checked with TSH) slows your metabolism and is a common, treatable cause. Insulin resistance and prediabetes (checked with HbA1c) drive fat storage and hunger, and a lipid profile shows the metabolic knock-on. Our thyroid and diabetes guides go deeper on each of these.
Where to start
A sensible first panel is TSH, HbA1c, and a lipid profile, which between them cover the common medical causes. A full body checkup includes all three plus more in one home visit. Whatever the result, act on it with your doctor rather than guessing.
This guide is for general information and is not a diagnosis. Always discuss your symptoms and results with a doctor. LabONE includes a free doctor consultation with every report.
Tests that help
Recommended panel
ThyroidShield
2 parameters in one panel
Frequently asked questions
Can a thyroid problem cause weight gain?
Yes. An underactive thyroid (hypothyroidism) slows your metabolism and commonly causes gradual weight gain along with tiredness and feeling cold. A TSH test is the usual first check.
Which tests should I do for unexplained weight gain?
Thyroid (TSH), blood sugar (HbA1c), and a lipid profile are the highest-yield checks. If you are unsure, a full body checkup covers all of them at once.
Not sure where to start?
Message LabONE on WhatsApp. We will help you pick the right test, book home collection in Dehradun, and your Green Card is free with any ₹999 booking.
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