Glutathione safeguards these mitochondria by neutralizing reactive oxygen species (ROS) before they can damage the mitochondrias fragile structure
Compare that to fighting traffic to a clinic, waiting, receiving treatment, and commuting back and the convenience argument becomes obvious
What is causing the high levels
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To help bypass any barriers to absorption in the GI tract, many healthcare providers recommend B12 injections for deficiency, but research shows that very high doses of oral B12 (1,000 to 2,000 mcg once a day) can normalize serum B12 levels to a similar extent with minimal side effects