You may also find yourself doing a little more lip licking than normal in the wintertime—not unusual, Dr. Turner tells me, but definitely a culprit. It’s so common that he says derms call it “lip lickers’ dermatitis.” But what gives?

“Saliva can actually be quite irritating to the skin [when you’re constantly licking your lips, because it] contains digestive enzymes [that] can break down the protective [skin barrier layer] on the lips,” he says.

“Hydroquinone is a skin-lightening agent that can be used to treat dark spots and patches, such as hyperpigmentation, sun spots, melasma, and post-inflammatory hyperpigmentation,” explains Dr. Turner. “It’s also a potent antioxidant.” Hydroquinone works by blocking tyrosinase, an enzyme that “converts the amino acid tyrosine into the precursors needed to produce melanin,” adds Dr. Turner. By inhibiting tyrosinase, hydroquinone reduces melanin production and helps lighten areas of hyperpigmentation. It’s one of the most potent skin-lightening agents available.

Ryan Turner, M.D. noted that they’re also fans, raving that the Naturium lotion has “additional ingredients to help support the skin barrier [and] is fragrance-free, which is great for sensitive skin types.” What’s more, they love its thick, hydrating formula that prevents retinol’s drying effects. Keep in mind, though, that the body lotion does take a few minutes to absorb. 

RoC’s formula features its titular ingredient, retinol, which imparts youthful-looking skin (ICYMI: The vitamin A-derivative is virtually uncontested in the realm of anti-aging ingredients). As dermatologist Dr. Ryan Turner, M.D., previously told InStyle, retinol “smooth[s] the appearance of fine lines and wrinkles, fade[s] discoloration, [and] make pores look smaller.” Moreover, it stimulates the production of collagen: skin’s structural protein responsible for lifting and firming.

In-demand New York City dermatologist Ryan Turner partnered with Aimee Bailey and longtime patient Carrie Pickett to create a trio of elegant skincare. The cleanser, moisturizer and serum formulas are rooted in science and plant-based. The rave: The Niacinamide 5% Restorative Serum which improves tone and texture of the skin (not shown), $55. Available at Trnrskin.com.

There are tons of skincare products at our fingertips, but experts say you don't have to adopt an intensive multi-step routine when curating one for your teen. Experts agree that three products are a good place to start for a teenage skincare routine: "Cleanser, moisturizer, and sunscreen," says Ryan Turner, MD, a board-certified dermatologist and co-founder of TRNR Skin based in NYC. "You can also find a moisturizing sunscreen formula and cut that routine down to two steps." 

Board-certified NYC dermatologist and co-founder of TRNR Skin, Dr. Ryan Turner, says that “‘glass skin’ is a term that originated as a Korean beauty trend, referring to skin that is so clear and smooth that it practically looks like glass. It also has a dewy finish, making skin reflective and extra glassy.”

TRNR Skin aims to bring skin-credentialed expertise to the masses, so that everyone has access to science-backed  skincare, even if (or rather, especially if) they can’t see a dermatologist regularly.

The mission of TRNR Skin is to expand education beyond the walls of its diverse Manhattan dermatology practice and provide formulas that can fit seamlessly into any at-home skincare routine, no matter age, identity, skin issues, lifestyle, or skin type. 

Coconut oil is the oil extracted from a coconut that can be used on skin and hair, usually to help seal in moisture. However, not all coconut oil is the same. Dermatologist Ryan Turner, MD, mentions that coconut oil comes in three different forms: Fractionated, hydrogenated, or virgin. “Fractionated and hydrogenated oils have been processed further to keep it in solid form or liquid form, respectively, while virgin is its purest form,” he explains. Virgin coconut oil goes from solid to liquid depending on the temperature.

“Switching to products that are lighter in weight or using fewer of them can often go a long way,” says Dr. Turner. Try swapping heavy mousses for airy volumizing foams, leave-in conditioning creams for serums, and strong-hold gels for mists. And while you can spritz in some dry shampoo to extend the life of your style for a day or two, don’t go overboard—too much can potentially clog your pores and trigger even more oil.