(Source 1) The body makes glutathione from the amino acids cysteine, glycine, and glutamine
However, increasing oral supplement doses (within safe limits) while awaiting medical review is generally considered safe, as B12 has very low toxicity and excess is excreted through the kidneys
"What is also cause for concern are side effects of intravenous injections, as well as the variable quality of the glutathione which could be supplied by suspect international sources to make a quick buck
Safety Levels and Precautions: Current medical guidelines, supported by research in the Journal of Pregnancy , recommend avoiding GLP-1 medications during pregnancy due to potential unknown risks

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