acetyl l-carnitine and chronic fatigue syndrome Myalgic encephalomyelitis/chronic (ME/CFS): diagnosis management | Journal of Translational Medicine Can l-carnitine reduce post-COVID-19 fatigue?
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Acute illness and complications caused by COVID-19 have been extensively studied

Generally, betaine has shown hepatoprotective properties against liver injury by enhancing antioxidant mechanisms and adipose tissue function, while reducing oxidative stress, endoplasmic stress, liver fibrosis and necrosis [17]

Front Microbiol (2018) 9(JUN)

De Bruyne, E

Mitochondria are an important site for the synthesis of steroid hormones and key neurotransmitters (Pak et al., 2020

Each domain was assessed for the risk of bias, and judgments of low, some concerns, or high were made based on predefined criteria
