To be or not to be: The second law of thermodynamics and the flow of life and death
Since areas of the brain such as the cerebral cortex are not yet fully developed at 23 weeks of age, the distribution of dye at this age would have appeared more widespread than in the adult, without actually being so

Sensitive skin Challenges: Retinol causes more irritation Even gentle peptides may sting on compromised barrier Strategy: Start with low-dose retinol (0.25% or 0.3%) Use soothing peptides (Matrixyl, copper peptides) Apply retinol 2-3x weekly initially Use sandwich method (moisturizer retinol peptides moisturizer) Consider separate AM/PM application Dry skin Challenges: Retinol increases dryness Needs extra hydration Strategy: Use hydrating peptide serums with hyaluronic acid Apply retinol over damp skin Heavy moisturizer after peptides + retinol Consider retinol in emollient base (like squalane) Oily/acne-prone skin Advantages: Tolerates retinol well (less dryness) Retinol helps with breakouts Strategy: Can use higher retinol concentrations (0.5-1%) Lighter peptide serums (water-based, not oil-heavy) Oil-free moisturizer Can apply peptides + retinol nightly once acclimated Mature skin (50+) Needs: More aggressive anti-aging May have thinner, more fragile skin Strategy: Build up to potent retinol (0.5-1%) gradually Use multiple peptide types (signal + copper + neurotransmitter) Apply peptides AM and PM Retinol PM only Rich, nourishing moisturizers Injectable peptides vs topical peptides with retinol Beyond topical skincare, some people use injectable peptides for anti-aging

It also provides an updated overview of IFs potential as a therapeutic strategy for weight management, metabolic optimization, and chronic disease prevention
Gouin, E
Chamcheu JC, Siddiqui IA, Adhami VM, Esnault S, Bharali DJ, Babatunde AS, Adame S, Massey RJ, Wood GS, Longley BJ, Mousa SA, Mukhtar H (2018) Chitosan-based nanoformulated (-)-epigallocatechin-3-gallate (EGCG) modulates human keratinocyte-induced responses and alleviates imiquimod-induced murine psoriasiform dermatitis