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Research suggests that GHK-Cu may influence biological pathways involved in collagen production and extracellular matrix maintenance
A doctor might prescribe testosterone gel for patients who prefer a non-invasive method of administration, want a steady absorption of testosterone, or have needle phobia
Unlike older growth hormone secretagogues, it doesn't significantly affect cortisol or prolactin levels, meaning you get the muscle-building and recovery benefits without unwanted hormonal side effects
Diabetes Care 45 , 27532786 (2022)
However, as we age, NAD+ levels start to drop
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