A dynamic balance is maintained between the synthesis, consumption, and transport of GSH, all of which determine its intracellular concentration
Anal Biochem 72
After adjusting for potential confounders, the relative risk of autistic disorder among vaccinated children compared with unvaccinated children was 0.92 (95% CI, 0.68-1.24) and the relative risk for other ASD was 0.83 (95% CI, 0.65-1.07)

[3] The most common causes are: [4] [5] [6] Injury or trauma, including sprains, hematoma Overuse: using a muscle too much, too often, including protecting a separate injury Chronic tension Muscle pain occurs with: Rhabdomyolysis, associated with: Viral infections Compression injury leading to crush syndrome Drug-related Commonly fibrates and statins Occasionally ACE inhibitors, cocaine, and some retroviral drugs Severe potassium deficiency Fibromyalgia EhlersDanlos syndrome Auto-immune disorders, including: Mixed connective tissue disease Systemic lupus erythematosus Polymyalgia rheumatica Polymyositis Dermatomyositis Multiple sclerosis (neurologic pain localised to myotome) Infections, including: Other Overuse [edit] Overuse of a muscle is using it too much, too soon or too often