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Research suggests that doses typically range from 250 to 1,000 mg per day, though individual needs may vary
most is hydrolyzed to amino acids in the digestive tract rather than absorbed intact
You can also get it from supplements, but most of it is broken down by enzymes in the gut into amino acids, such that only long-term use of large amounts (500 mg or more) appears to modestly raise glutathione levels
Ubiquitin is typically conjugated to lysine residues on substrate proteins, most classically via K48 linkages, forming polyubiquitin chains that are recognized by the 26S proteasome
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