03/30/2026
These are some of the key labs I often check when evaluating fatigue:
• CBC – helps identify anemia or signs of infection that can drain energy
• Iron (Ferritin) – shows your iron stores; low levels are a very common cause of fatigue
• Vitamin B12 – important for energy, focus, and nerve function
• Vitamin D – low levels can contribute to fatigue, low mood, and muscle aches
• Thyroid (TSH, Free T4) – regulates metabolism; imbalance can slow everything down
• Glucose & A1C – helps assess blood sugar patterns that may cause energy crashes
• CMP – evaluates liver, kidney function, and electrolytes that impact overall energy
Discuss sleep and stress….very important!!!
Fatigue is a signal from your body — not a final diagnosis.
A thoughtful, complete evaluation can make a difference.
PMIDs: 25848084, 21705493, 18451362, 23844091, 28564623, 20350913
🚫medical advice. Consult your physician