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References Cleveland Clinic

For example, it appears to play a role in immune response and might have a beneficial effect on fibrocystic breast disease and growth of abnormal cells in breast tissue

Avoid excessive cardio, as it can increase muscle loss and elevate cortisol, which may hinder weight loss

Practitioners also carefully screen patients: for example, they check for metal allergies (since GHK-Cu contains copper) and discuss alternative evidence-based treatments

In: Environmental Pollutants and Their Bioremediation Approaches (2020), 14568

However, excessive exercise, particularly endurance training, can elevate cortisol and compete with hair follicles for nutritional resources