Hascup KN, Britz J, Findley CA, Tischkau S, Hascup ER
doi: 10.3390/cells11213419
30, Glutathione: 500mg Liposome Proprietary Blend: Phosphatidylcholine Complex (From Non-GMO Sunflower Lecithin), Glycerin: 500mg, Other Ingredients: Purified water, natural flavors, and potassium sorbate (0.1%)
Specific application sequences Sequence 1: Peptides first, then retinol (same routine) Cleanse face Apply peptide serum to damp skin Wait 1-2 minutes for absorption Apply retinol Wait 1-2 minutes Apply moisturizer Best for: Most peptides (Matrixyl, Syn-Coll, general collagen peptides) Sequence 2: Retinol first, then peptides (less common) This is rarely recommended because retinol benefits from being closer to skin, and peptides are often in hydrating serums that work well after retinol