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Transit speed fluctuates with meals, stress, caffeine, sleep, and activity across a single day
Strongest human evidence (topical) The Leyden 2002 photoaging trial in 71 women applied a GHK-Cu facial cream for 12 weeks and reported measurable improvements in skin density, thickness, fine lines, and laxity
Chowdhry S et al
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As the blood moves through your digestive system, it turns black and gets sticky
It is a hormone your body naturally produces in the gut after eating
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