catalase vs glutathione peroxidase Figure 10. | Peroxidase-Catalase Cooperativity Is Required for Resistance to Hydrogen Peroxide by Mature Rat Oligodendrocytes Enhancing the skin's natural antioxidant

Fermented soya foods and seaweeds dont provide a reliable source of B12 and you would be hard-pushed to get your 50 micrograms a day from fortified foods alone, so its best to take a supplement with fortified foods acting as a top up

10.5935/1518-0557.20200003 50 Roian

GHK-Cu is the most studied in research and skincare

Moisture retention: Glutathione aids in preserving skin moisture, which may contribute to a more hydrated and plum skin texture, which is essential for maintaining a healthy complexion

References [1] [2] [3] [4] [5] [6] [7]

If you are looking for a GHK-Cu product formulated with barrier compatibility in mind, Blue Balm by HealthyDerm pairs copper peptides with a grass-fed tallow base that mirrors your skin's own lipid profile, designed to deliver the benefits of copper peptide deep into the dermis while keeping the surface calm