Sample results
Severe illness encompasses critical medical conditions that significantly impact the body's normal functioning and multiple organ systems. During critical illness, the body undergoes metabolic stress that commonly triggers non-thyroidal illness syndrome, where free thyroxine (T4) levels become altered. The Thyroxine Free, Direct Dialysis (FT4) test is the most important test for monitoring metabolic function and distinguishing illness-related thyroid changes from true thyroid disease during severe illness.
Severe illness complications are caused by the body's systemic stress response to critical medical conditions that affect multiple organ systems simultaneously. During severe illness, physiological stress triggers metabolic disruptions, immune system dysregulation, and hormonal imbalances that can lead to secondary complications. One of the most common complications is non-thyroidal illness syndrome, where the body's metabolic adaptation causes alterations in thyroid hormone levels even when the thyroid gland itself is functioning normally, which can significantly impact recovery and prognosis.
The Thyroxine Free, Direct Dialysis (FT4) test is the most important test for monitoring severe illness because it detects metabolic changes that commonly occur during critical illness. This test measures free thyroxine (T4), the active thyroid hormone that regulates metabolism throughout the body. During severe illness, free T4 levels typically decrease due to non-thyroidal illness syndrome, and monitoring these levels helps healthcare providers assess how the illness is affecting metabolic function and distinguish between illness-related thyroid changes and actual thyroid disease. This information is essential for managing treatment and predicting recovery outcomes in critically ill patients.
You should get tested if you are currently hospitalized or recovering from a critical medical condition, experiencing prolonged illness lasting several weeks or months, or if your healthcare provider suspects metabolic complications during your illness. Testing is particularly important if you have symptoms of metabolic dysfunction such as unexplained fatigue, temperature regulation problems, or changes in heart rate that persist during or after severe illness. Early detection of complications like non-thyroidal illness syndrome through FT4 testing can help guide treatment decisions and monitor your recovery progress.
What this means
Your testosterone levels are slightly below the optimal range. While this is not necessarily cause for concern, it may contribute to occasional fatigue, reduced motivation, or lower muscle mass over time.
Recommended actions
Increase resistance or strength training
Prioritize 7–8 hours of quality sleep per night, try to reduce stress
Include more zinc- and magnesium-rich foods (like shellfish, beef, pumpkin seeds, spinach)
Consider retesting in 3–6 months
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Sample results
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