Doctor's Assessment Included
Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
ACTH (Adrenocorticotropic Hormone)
ACTH is the pituitary hormone responsible for triggering cortisol release from your adrenal glands. For athletes, monitoring ACTH may help assess how your body adapts to training stress and supports recovery processes.
Reference Ranges
Low
1.6
Normal
13.9
High
Low
1.6
Normal
13.9
High
Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.
What It Measures
This test measures the level of ACTH in your blood. Results may help evaluate how well your pituitary gland communicates with your adrenal glands to regulate cortisol production and maintain hormonal balance throughout the day.
Why It Matters
For athletes, ACTH regulation directly influences cortisol and recovery from intense training. Abnormal levels could suggest overtraining or adrenal fatigue that may impair performance. Consult your sports medicine provider for proper evaluation.
When to Test
ACTH testing is typically recommended in the early morning, when levels are naturally at their peak. Your healthcare provider may suggest this test if you show signs of adrenal or pituitary dysfunction, or unexplained fatigue.
Symptoms
Low Levels
Some people may experience fatigue, muscle weakness, weight loss, or low blood pressure when ACTH levels are below the expected range. These symptoms could suggest reduced adrenal stimulation. A healthcare provider can help determine the underlying cause.
High Levels
Some people may experience weight gain, skin changes, high blood pressure, or mood disturbances when ACTH levels are elevated. High levels could suggest overstimulation of the adrenal glands. Discuss your results with your healthcare provider.
Lifestyle Tips
Maintaining a consistent sleep schedule, managing stress through mindfulness or exercise, and eating a nutrient-rich diet may support healthy pituitary-adrenal function. Avoid excessive caffeine and alcohol. Always consult your healthcare provider for personalized advice.
Frequently Asked Questions
What does ACTH do?
ACTH signals your adrenal glands to produce cortisol, helping regulate your body's stress response.
Why is morning testing preferred?
ACTH levels follow a daily rhythm and are typically highest in the early morning hours.
Can stress affect ACTH levels?
Yes, physical or emotional stress may temporarily increase ACTH production from the pituitary gland.