Irritation and sensitivity Retinol alone can cause: Redness Peeling Dryness Burning sensation Increased sensitivity Adding peptides usually helps: Most peptides are soothing Support skin barrier repair Reduce inflammation When irritation occurs despite peptides: Reduce retinol frequency (every other night instead of nightly) Use lower retinol concentration (0.25% or 0.5% instead of 1%) Apply peptides in morning, retinol at night (not together) Add more moisturizer Take retinol break for few days pH incompatibility concerns The pH issue: Retinol works best at pH 5.5-6 Some peptides work best at different pH ranges Mixing products with very different pH can reduce effectiveness In practice: Modern formulations account for this Short contact time between layers minimizes pH issues Many successful products combine peptides + retinol in same formulation Solution: Don't worry excessively about pH
Beverages 6:36
[DOI] [PMC free article] [PubMed] [Google Scholar] 548
Dosing and administration The standard clinical protocol calls for 2mg administered subcutaneously once daily, typically in the abdominal region with injection sites rotated regularly
Ishizawa J, Kojima K, Chachad D, Ruvolo P, Ruvolo V, Jacamo RO, Borthakur G, Mu H, Zeng Z, Tabe Y, Allen JE, Wang Z, Ma W, Lee HC, Orlowski RZ, Sarbassov DD, Neelapu SS, McDonnell T, Miranda RN, Wang M, Kantarjian H, Konopleva M, Davis RE, Andreeff M
10.3389/fimmu.2017.00628 58 LiuH.ZhaoC.ZhangW.ZhangY.NieJ
