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Non-reduced glutathione (oxidized) must be converted back to the reduced form to be effective
Unknown Long-Term Effects : Long-term risks remain unclear because controlled human studies have not established durable safety outcomes, organ effects, cancer-related concerns, or interaction risks
Also, people with diabetes who take a medication called metformin are at a higher risk of developing B12 deficiency because this medication can reduce B12 absorption
(3, 4) Studies have also shown that supplementation with glutathione precursors helped to regenerate levels of vitamins A, C and E
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