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Can Your Sleep Affect Your Thyroid Levels?
Written by SiPhox Health Research Team
Last updated: October 15, 2026
2 mins read
The surprising connection between sleep and thyroid hormones
Getting enough sleep supports everything from energy levels to metabolism. But did you know that sleep may also influence your thyroid hormone levels?
New research suggests that the relationship between sleep and thyroid function is more complex than previously understood.
What does the latest research show?
A 2026 systematic review examined 25 studies investigating how sleep deprivation affects thyroid hormones.
Researchers found that insufficient sleep was associated with changes in thyroid-related blood markers, particularly TSH and Free T3.
However, the findings varied between studies, and more research is needed to understand how these changes affect long-term thyroid health.
Importantly, this does not mean that a few nights of poor sleep will cause thyroid disease.
Can thyroid function also affect your sleep?
Yes. Thyroid hormones help regulate your body’s activity and energy use.
When thyroid hormone levels are excessively high, some people experience difficulty sleeping, increased sweating, or restlessness.
Low thyroid hormone levels can also be associated with fatigue and certain sleep disturbances.
However, poor sleep and daytime tiredness are extremely common and can have many causes unrelated to thyroid function.
What does this mean for you?
Maintaining consistent, healthy sleep habits is an important part of overall wellness.
If you’re tracking your thyroid biomarkers, it may be helpful to consider your recent sleep patterns alongside other factors such as stress, medications, and general health.
Persistent sleep difficulties or concerning thyroid results can be discussed with your healthcare provider.
Key takeaway: Sleep and thyroid function may influence one another. While improving sleep isn’t a treatment for thyroid disease, understanding your sleep patterns can provide valuable context when reviewing your thyroid health.