There isn't a universally recognized "Type 7 hormone." The term "type 7" isn't a standard classification within endocrinology. However, several sources list seven different hormones, and adrenaline is frequently included in such lists. The specific hormones listed vary depending on the context and the author's focus.
Hormones Frequently Included in Lists of Seven:
Multiple sources mention seven hormones, although the exact seven hormones included may differ slightly. A common grouping includes:
- Cortisol: A stress hormone vital for regulating metabolism and immune response.
- Estrogen: Primarily a female sex hormone, impacting reproduction and overall health.
- Testosterone: Primarily a male sex hormone, crucial for muscle development, sex drive, and more.
- Thyroid Hormones (T3 and T4): Regulate metabolism, affecting energy levels and bodily functions.
- Insulin: Regulates blood sugar levels.
- Growth Hormone: Promotes growth and development, especially during childhood and adolescence.
- Adrenaline (Epinephrine): A stress hormone, playing a key role in the "fight-or-flight" response.
Different sources may substitute one hormone for another in this list of seven. For example, one source may include progesterone instead of estrogen, or include other hormones like melatonin or ghrelin. The number seven appears to be an arbitrary grouping for educational or organizational purposes rather than a formal hormonal classification.
Several sources refer to "7 hormone types" in the context of balancing hormones and creating tailored diets, as seen in the title "The Hormone Type Cookbook". These types, however, are not distinct hormonal classes but rather a grouping based on hormonal impact on health conditions such as PMS, PCOS, fertility, and menopause. This is a different use of the number seven.
Adrenaline as a Potential "Type 7" in Some Contexts:
Reference 7 specifically mentions adrenaline (epinephrine) as a stress hormone produced in the adrenal glands and some central nervous system cells. Therefore, in some lists of seven hormones, adrenaline holds a place.
