A Gentle Yet Effective Retinol Serum: Peter Thomas Roth Retinol Fusion PM Night Serum The Peter Thomas Roth Retinol Fusion PM Night Serum ($49, originally $65) has microencapsulated retinol that will help with uneven texture, fine lines, and dark spots, without the irritation. Image Source: amazon.com Peter Thomas Roth Retinol Fusion PM Night Serum $49 from amazon.com Buy Now