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As skin-aging research from groups including Gary Fisher at Michigan has shown for decades, elevated MMP1 is a primary engine of collagen fragmentation in aged and photoaged skin.[28] If your DNA hands you a high-activity MMP1 genotype, you degrade collagen faster than average—and a collagen- stimulating strategy alone keeps refilling a leaky bucket

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Collagen stimulation: supported in vitro and in small human trials Skin repair: supported in wound-healing models, less clear for cosmetic use Firmness: plausible mechanism, limited robust human data "Glow": marketing language, not a clinical endpoint What should you actually know