The thyroid gland and thyroid hormones are responsible for many biological functions, including immune balance, energy production and body temperature control, fat storage and burning, weight control and body composition, nutrient absorption, sleep and stress regulation and cardiovascular health.
About 90 % of the thyroid’s production of hormones is T4 (thyroxin), which is the primary thyroid hormone and made when four molecules of iodine combine with the amino acid tyrosine. T4 is converted into T3 (triiodothyronine), which is the more bioactive form of thyroid hormone.
Estimates are that as many as 1 in 10 people suffer from some type of thyroid disorder.1 Thyroid hormone imbalances can be negatively affected by:
- Chronic stress and cortisol imbalances
- Physical inactivity
- Sleep disturbances
- Sex hormone imbalances
- Insulin resistance; impaired glucose tolerance
- Gastrointestinal imbalances
- Environmental toxicity, such as lead, mercury, phthalates, plastics (including BPA) and pesticides
- Excessive alcohol intake