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Hello. My c3 serum is 199 which is high. What would cause this?

I tested positive for Ana and further testing showed high c3 serum level of 199
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1756321 tn?1547095325
"Increased complement levels may be associated with acute or chronic inflammation or conditions such as cancer, ulcerative colitis or thyroiditis." - RequestATest - Complement C3 and C4 blood test
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1756321 tn?1547095325
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