How to Control Your Metabolism by Thyroid & Growth Hormone | Huberman Lab Podcast #17

Thyroid & Menstrual Cycle

The interplay between thyroid hormones and the menstrual cycle is complex and significant. Andrew Huberman explains that thyroid hormone levels can fluctuate dramatically during the menstrual cycle, influencing carbohydrate cravings and metabolism 1. This fluctuation is particularly evident in the first half of the cycle, where increased carbohydrate intake supports healthy thyroid function. Huberman notes, "In general, the first half of the cycle before ovulation, people crave carbohydrates and sweets more related to the."

And that makes total sense.

--- Andrew Huberman

Understanding these hormonal shifts can help tailor dietary choices to maintain optimal thyroid health, especially for those following a ketogenic diet, which may lower thyroid hormone levels 2.

   

Insulin & Hormones

Insulin and dietary choices play a crucial role in regulating thyroid and growth hormone levels. Andrew Huberman highlights how non-caloric sweeteners like stevia can influence insulin management, although their impact on blood glucose is minimal 3. The ketogenic diet, characterized by low blood glucose levels, can lead to reduced thyroid hormone production, affecting metabolism and weight management 2. Huberman states, "Carbohydrates, starchy carbohydrates in particular, support the healthy production of T3 and T4."

And so if you're very low carbohydrate, you're going to have a reduction in T3 and T4.

--- Andrew Huberman

Additionally, exercise patterns influence growth hormone and IGF-1 levels, with sex-dependent effects observed in hormone release during physical activity 4.