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According to their review, the clinical characteristics of other PAIS appear almost indistinguishable from long COVID as described above, including exertion intolerance, fatigue, neurocognitive and sensory impairment, sleep disturbances, joint and muscle pain, and non-specific symptoms that are often present but of variable severity

Helps the body to produce more amount of energy as it is necessary for the functioning of the heart and brain, muscle movements, and other body processes

This condition involves exposure to harmful metabolic compounds, which contribute to autoimmunization 19,20

200,202,203 Importantly, metformin can increase homocysteine levels