4 doctors weighed in:

Can the underactive thyroid cause weight loss or only weight gain?

4 doctors weighed in
Dr. Mark Roberto
Preventive Medicine
1 doctor agrees

In brief: Weight Gain

Hypothyroidism (low) is associated with gaining weight, because your metabolism is too slow and sluggish.
The most common cause is autoimmune, called Hashimoto's. Other symptoms include fatigue/lethargy, muscle aches, menstrual irregularity, constipation, feeling cold, dry skin, depression, and coarse hair. you may have a goiter/enlarged thyroid. Blood tests can show anemia, high cholesterol.

In brief: Weight Gain

Hypothyroidism (low) is associated with gaining weight, because your metabolism is too slow and sluggish.
The most common cause is autoimmune, called Hashimoto's. Other symptoms include fatigue/lethargy, muscle aches, menstrual irregularity, constipation, feeling cold, dry skin, depression, and coarse hair. you may have a goiter/enlarged thyroid. Blood tests can show anemia, high cholesterol.
Dr. Mark Roberto
Dr. Mark Roberto
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Dr. Stephen Southard
Internal Medicine

In brief: Not typical

It would be very atypical to loss weight from untreated hypothyroidism, unless your appetite were significantly compromised.

In brief: Not typical

It would be very atypical to loss weight from untreated hypothyroidism, unless your appetite were significantly compromised.
Dr. Stephen Southard
Dr. Stephen Southard
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Dr. Phillip Goebel
Emergency Medicine

In brief: Hypothyroidism

Hypothyroidism is usually associated with weight gain more than weight loss.

In brief: Hypothyroidism

Hypothyroidism is usually associated with weight gain more than weight loss.
Dr. Phillip Goebel
Dr. Phillip Goebel
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