Controlled human trials exist, but they're limited in size, focused mostly on topical cosmetic use, and usually last only a few weeks or months. That means a lot of the exciting claims, especially around gene expression, systemic repair, and anti-aging effects, haven't been confirmed in large-scale human studies
Pickart L, Margolina A Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data Int J Mol Sci , 2018
Only a small portion of patients have inflammatory synovitis as a background, but it is a well-described cause [75]
Coconut oil melts around 25 C so it is solid in the tub but melts on contact with the skin
Hormonal imbalance also explains why acne often strikes during teenage years and early adulthood