Peptides complete advices guide: The advantage is that the peptides made in the laboratory penetrate the skin better and their effects are more visible. “In their natural form, peptides are extremely fragile and chemically unstable, so those created in the lab are a good enough option for our skin. They are released exactly when needed and repair exactly what needs to be repaired. In order to do their job well, they must be able to penetrate the layers of the skin so that they can actually learn to behave as when they were younger, ”explains Dana. What are the benefits …