Water-heavy gels without penetration aids deliver most GHK-Cu to the stratum corneum surface rather than viable epidermis and dermis
But this method is expensive and not easily available to the average neurohacker
Glutathione is one of the most powerful intracellular antioxidants, supporting skin, liver, immune, and cellular health for both men and women
PeptideStack separates research-use-only peptide information from FDA-approved medication and licensed telehealth pathways

Lactococcus ferment lysate Research from 2023 suggests that adding fermented cultures of various probiotic strains to lotion can improve skin barrier function, reduce skin redness and irritation, and boost moisturization in part by helping to prevent transepidermal water loss (TEWL).29 Matrixyl 3000 and Matrixyl synthe'6 According to a 2023 review, in a small study on 24 men, the use of Matrixyl 3000 for two months led to a reduction in wrinkle depth by 10.2% and wrinkle volume by 17.1%.30 Similarly, another small study using a product that included Matrixyl 3000 as an ingredient (among others) found that, by day 28 of use, a majority of participants (75% of 32 total subjects) expressed overall satisfaction with their skin appearance, and a significant decrease in the number, depth, and volume of wrinkles was noted by researchers.30 While its difficult to find research specifically on Matrixyl synthe'6, studies on palmitoyl tripeptide38 suggest that the ingredient stimulates the synthesis of collagen, hyaluronic acid, fibronectin (a protein important for wound healing), and laminin (proteins that play a key role in maintaining the structure of the bodys tissues)

This advanced formula combines glutathione for skin whitening and collagen for anti-aging benefits