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The symbol \(y_i^D\) denotes the data point at time point \(t_i\) and \(\sigma _i(\theta )\) is the standard deviation computed from the error model, in our case a constant for each target
Studies show that boosting GHK-Cu peptide can improve tissue repair and regeneration
Animal studies [5] suggest localized injections may have greater effects on muscles, tendons and ligaments, but safety and efficacy in humans are still under investigation
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