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This can lead to a shorter duration of B12 in the body, increasing the need for supplementation or injections to maintain adequate levels

(Innopeptides) Long-term storage, delivery (penetration into tissues, safety of cell-penetrating segments) are still being worked out

As we age, levels can fall

Oral GHK-Cu is more convenient but faces significant absorption challenges due to enzymatic degradation in the digestive tract

Injection delivery is the defining advantage, because it bypasses the digestive breakdown that limits oral glutathione and reaches the bloodstream at meaningful concentrations