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Both are acceptable

If someone has more of the inactive, or oxidized, form of glutathione (GSSG), then it tells me we need to help the body convert the oxidized glutathione into reduced glutathione, which could be done with supplements like milk thistle, selenium, alpha lipoic acid, B vitamins, and taurine

The half-lives vary significantly: BPC-157 appears to have a relatively short plasma half-life (under 4 hours in rodent studies) but demonstrates prolonged tissue effects, TB-500 has a longer half-life of approximately 24 days, and GHK-Cu's pharmacokinetics show rapid clearance but sustained signaling effects in treated tissue