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Romero M, Toral M, Gomez-Guzman M, et al
2015 measured permeation through human skin samples held in a Franz cell apparatus, not living skin on a living person 3
Because GHK-Cus value comes from sustained, systemic support rather than a one-time concentrated dose, the format thats easiest to use consistently without needles, mixing, or refrigeration is generally the more effective choice in practice
Assessment and management of nutrition in older people and its importance to health
Recent trials, published in the European Journal of Nutrition, highlight its benefits
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