Autoimmune diseases occur when the immune system mistakenly attacks healthy tissues in the body. They are caused by immune system overactivity that produces antibodies targeting multiple organs and tissues through cross-reactive mechanisms. The Thyroid Peroxidase (TPO) Antibodies test is the most important test for assessing systemic autoimmune activity because it detects cross-reactive antibodies present in rheumatoid arthritis, lupus, and type 1 diabetes.
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Autoimmune diseases are caused by immune system dysfunction where the body produces antibodies that attack its own healthy tissues. The exact trigger varies by condition, but genetic predisposition combined with environmental factors like infections, stress, medications, or hormonal changes can activate this abnormal immune response. Once triggered, the immune system creates cross-reactive antibodies that can target multiple organs simultaneously, which is why people with one autoimmune condition often develop others over time.
The Thyroid Peroxidase (TPO) Antibodies test is the most important test for assessing autoimmune disease activity because it detects cross-reactive antibodies that appear in multiple autoimmune conditions including rheumatoid arthritis, lupus, and type 1 diabetes. Even when thyroid function remains normal, elevated TPO antibodies indicate systemic immune overactivity and potential multi-organ involvement. This test provides valuable insight into the extent of immune system dysfunction and helps healthcare providers understand the broader autoimmune processes occurring in your body, which can guide comprehensive management strategies.
You should get tested if you experience unexplained fatigue that does not improve with rest, persistent joint pain or swelling, recurring low-grade fevers, skin rashes or changes, unexplained weight changes, or if you have a family history of autoimmune conditions. Testing is also important if you already have one diagnosed autoimmune disease, as the presence of cross-reactive antibodies may indicate risk for developing additional autoimmune conditions. Early detection through blood testing allows for timely intervention and better management of immune system dysfunction.
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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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