Ketogenic Diet and Thyroid Function: A Delicate Metabolic Balancing Act

Area of Science:

• Endocrinology
• Nutritional Science
• Metabolic Research

Background:

• The ketogenic diet (KD), characterized by high fat and low carbohydrate intake, induces significant metabolic shifts.
• These shifts impact endocrine function, particularly thyroid hormone regulation, by altering fuel sources from glucose to fatty acids and ketones.

Purpose of the Study:

• To explore the intricate mechanisms through which the KD influences thyroid function.
• To highlight the potential therapeutic benefits and associated risks of the KD concerning thyroid health.

Main Methods:

• This review synthesizes current research on the KD's effects on thyroid hormone metabolism.
• It examines alterations in insulin signaling, inflammation, and deiodinase activity.
• Factors such as genetics, gut microbiota, and sex differences influencing thyroid adaptation are considered.

Main Results:

• The KD can lead to reduced triiodothyronine (T3) levels and altered hypothalamic-pituitary-thyroid (HPT) axis dynamics.
• Potential benefits include improved insulin sensitivity and reduced inflammation.
• Emerging evidence suggests therapeutic potential for autoimmune thyroid diseases and thyroid cancer.

Conclusions:

• Understanding the KD's complex effects on thyroid health is crucial for clinical applications.
• Balancing the benefits and risks is essential for developing personalized nutritional strategies.
• Further research is needed to fully elucidate the KD's impact on thyroid function and related conditions.