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Though it is found in every cell, glutathione cannot penetrate cell walls, thus it cannot be externally supplemented, and it must be biosynthesized inside the cell
G., Pozzi, A., Zent, R
Pharmacological similarity to a known beta-3 agonist, inhibition by a nonselective antagonist, or convergence on a downstream signal would not independently prove direct receptor binding
It is a well-studied, well-tolerated, FDA-approved compound with a long history
More resilient categories tend to be the ones that have that focus on protein, a focus on convenient protein as well
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