What it is: An advanced antiaging cream that brings nutrients, antioxidants, and rich emollients to the skin. What it is formulated to do: Perricone MD Neuropeptide Firming Moisturizer is a superior hydrating cream that delivers advanced proprietary neuropeptide technology to help firm sagging skin while correcting the appearance of lines and wrinkles. It was developed especially for skin that shows signs of dehydration and loss of elasticity.