While it's true there is no magic bullet when it comes to perfecting skin, one ingredient comes pretty close: retinol. "Prescription Retin-A and Tretinoin and over the counter retinols increase skin cell turnover and stimulate collagen synthesis," explains Jennifer Chwalek, MD of Union Square Laser Dermatology. "With consistent use of a topical retinol or Retin-A you can see improvement of fine lines, dark spots, texture, and tone." Ready to add retinol to your routine? Here are the latest options to stock up on. SEE THE PRODUCTS.