The goal of this observational study is to determine the serum metabolome profile differences in the presence of possible sarcopenia in patients with fibromyalgia and to compare them with healthy individuals. In this way, it is aimed to contribute to the knowledge about the pathophysiology, diagnosis and treatment of these diseases.The main questions it aims to answer are: * Is there a difference in blood metabolite levels and metabolic pathways in fibromyalgia syndrome and possible sarcopenia accompanying fibromyalgia syndrome? * Based on these identified differences, can biomarkers be determined for these diseases?
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Comparison of serum metabolite concentrations between groups. Plasma samples were collected from all participants. Samples were centrifuged at 1500 rpm for 10 minutes and stored at -80 degrees to be used in metabolome analysis.
Timeframe: through study completion, an average of 1 year