Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Kiehl's Ultra Facial Cream SPF 30 Versus Youth To The People Polypeptide-121 Future Cream with Peptides and Ceramides

This barrier-repair day moisturizer is formulated around Squalane and Ectoin to strengthen the skin barrier and hydrate skin. This anti-aging moisturizer is formulated around Hydrolyzed Hyaluronic Acid and Acetyl Tetrapeptide-9 to soften the look of wrinkles a

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  • This barrier-repair day moisturizer is formulated around Squalane and Ectoin to strengthen the skin barrier and hydrate skin.
  • This anti-aging moisturizer is formulated around Hydrolyzed Hyaluronic Acid and Acetyl Tetrapeptide-9 to soften the look of wrinkles and hydrate skin.