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Firming peptides: Multiple peptides in the formula, including Palmitoyl Tripeptide-5 and Acetyl Hexapeptide-1, support elasticity and collagen signaling

doi: 10.1056/NEJMoa1700518 190

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routine B12 level monitoring is generally unnecessary once replacement is established, as levels do not reliably correlate with tissue stores Important safety considerations: Older adults may have impaired renal function, though this rarely affects B12 therapy given its wide safety margin