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It does so by optimizing oxygen supply to the muscles and reducing the accumulation of metabolic waste like lactic acid

2) Human Study

However, since endoscopic biopsy of intestinal tissue is an invasive procedure and carries the risk of infection and discomfort to the patient, stool samples are preferred for determining diversity and distribution of microbes in the gut and for dysbiosis assessment, although this has its own limitations (207, 208)

Mol Neurobiol 54:42714291 Mukai R, Matsui N, Fujikura Y et al (2016) Preventive effect of dietary quercetin on disuse muscle atrophy by targeting mitochondria in denervated mice

Recognize that these typical stages of development and "ups and downs" may correlate with a new treatment