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These points make it quite clear why B12 shots are not the magic bullet for weight loss that many hope they will be
Brambell FW, Hemmings WA, Morris IG
The responsible takeaway is that topical GHK-Cu has a reassuring but not exhaustively proven safety record, while systemic use is genuinely under-studied in humans
Its excellent water solubility also reduces the difficulty of formulation development, making it adaptable to most aqueous cosmetic systems
The point is not to use those doses but to illustrate the wide safety margin
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