Before these two steps, however, she cleanses her skin with a super gentle face wash, which right now is Simple Waterboost Micellar Gel Wash. For free-radical protection, she relies on the SkinCeuticals Phloretin CF, a vitamin-packed serum that protects the skin from environmental stressors. She then follows up with a moisturizer that contains sunscreen, just like Zeichner. Her two favorites are Neutrogena Healthy Defense SPF 50 and Elizabeth Arden Prevage City Smart SPF 50, the latter of which also shields the skin from pollution.

Night:

As far as her nighttime routine goes, Marchbein likes to add in a prescription retinoid as well as an ultra-hydrating moisturizer, followed by an occlusive product in certain areas that require extra TLC. "At night after a gentle cleansing, I apply Retin-A Micro, which I really love, followed by a moisturizer, such as Neutrogena Hydro Boost Gel Cream or Simple Water Boost Skin Quench Sleeping Cream," she says. "Then I apply either Aquaphor or Vaseline ointment to my lips and eyelids because it helps seal in moisture in these thin skin areas that are prone to dryness and cracking."

Marchbein also never forgets to give her body some love. For this, she turns to Vaseline Clinical Care Extremely Dry Skin Repair Lotion or CeraVe Moisturizing Cream, both of which she says contain ingredients like ceramides, hyaluronic acid, and glycerin to seal in hydration. "I also exclusively use Dove body washes; my favorite is the classic Deep Moisture one," she says. "Within 60 seconds of getting out of the shower, I apply a thick layer of moisturizer to maintain optimal hydration throughout the night."

The Extras:

Two or three times a week, Marchbein likes to slough away dead skin cells using a physical exfoliant. "I gently scrub away the old skin with either the St. Ives Radiant Skin Exfoliating Face Scrub or the Neutrogena Hydro Boost Exfoliating Cleanser to improve dull, flaky skin," she says. "It makes an instant difference."

Shereene Idriss, dermatologist in New York City

Courtesy of Dr. Idriss/Brittany Theophilus

Morning:

Shereene Idriss is a New York City dermatologist specializing in facial aesthetics and rejuvenation. You also might remember her from our All About Eyes issue. Idriss says she bases her morning routine on what she feels her skin needs that day. "Generally, I'll shower and wash my face with water only," she says. "I’ve most likely exfoliated the night before and therefore don’t want to overstrip my skin of its natural oils," she explains of her cleanser-free step. Then she goes right in with an antioxidant serum — everyone's favorite, SkinCeuticals CE Ferulic. "It's my personal go-to because it contains a potent triple combination of antioxidants, including vitamins C, E, and ferulic acid — this simple step helps dramatically with the improvement of fine lines, skin firmness, and overall brightening."

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For a moisturizer that contains SPF, she swears by the Alastin HydraTint Pro Mineral Broad Spectrum Sunscreen SPF 36. "It offers powerful yet lightweight protection, skin-hydrating ingredients, and antioxidants, like green tea extract and vitamin E, which protect against pollution-induced damage," she says. "This product has a subtle complexion-enhancing tint that evens out my skin tone and allows me to start my day without any makeup on."

Night:

Come evening, Idriss likes to address whatever "issues" may have surfaced on her skin during the day. Regardless, though, she always starts her routine by removing her makeup with Garnier Micellar Cleansing Water and follows with a sulfate-free gentle cleanser, as she says they tend to be less irritating. "I personally love the CeraVe Hydrating Cleanser because, as the name implies, it quenches your skin with ceramides, hyaluronic acid, and glycerin, which are all key ingredients for locking in moisture," she says.