Extra-C is safe to use, but it is always recommended to seek the advice of a healthcare professional before using it with prescribed medications
This essential peptide can be found in various foods and supplements
[DOI] [PMC free article] [PubMed] [Google Scholar] 159.Li J., Cao F., Yin H.-L., Huang Z.-J., Lin Z.-T., Mao N., Sun B., Wang G
"Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data"
The maximum levels allowed in several food categories range from 75 to 250 mg/kg, and the acceptable daily intake (ADI) is set to 1.9 mg/kg of body weight ( Several studies, on different fish species, have demonstrated that calcium-chelating is crucial to the structural preservation of parvalbumin and its IgE-binding capacity ( in vitro, the apo-parvalbumin, i.e., the Ca 2+ -free form of parvalbumin, and explore its reduced IgE-affinity and potential decreased allergenicity
If you need to be outside, use sunscreen to protect your skin (50 SPF)