How Do We Take Care of Your Skin? What the Research Says

Skin care does not require a 10-step routine or expensive products. The research consistently points to a few core habits that matter far more than anything else: daily sun protection, gentle cleansing, and consistent moisturizing. Everything else—serums, masks, devices, and special ingredients—builds on that foundation. If you get those three basics right, you are doing more for your skin than most people who own dozens of products.

Why Does Sunscreen Matter More Than Everything Else?

Sun damage is the single largest cause of premature skin aging. Ultraviolet (UV) radiation breaks down collagen and elastin, the proteins that keep skin firm and smooth. Over time, this leads to wrinkles, sagging, and dark spots. The damage is cumulative, meaning it builds up slowly over years of exposure.

Research consistently shows that people who use sunscreen daily have significantly less visible aging than those who do not. This is not a marketing claim. It is one of the most well-supported findings in dermatology. Sunscreen also reduces the risk of skin cancer, including melanoma, the most dangerous form.

Use a broad-spectrum sunscreen with an SPF of at least 30. Broad-spectrum means it protects against both UVA and UVB rays. UVA rays penetrate deeper and cause aging. UVB rays cause burning. You need protection from both. Apply it every morning, even on cloudy days, because UV rays pass through clouds. Reapply every two hours if you are outdoors.

What Does a Proper Cleansing Routine Look Like?

Cleansing removes dirt, oil, sweat, and pollution from the skin surface. But over-cleansing can strip the skin of its natural oils, leading to dryness, irritation, and a damaged skin barrier. The skin barrier is the outermost layer that keeps moisture in and irritants out. When it is compromised, skin becomes red, flaky, and sensitive.

Most dermatologists recommend washing your face twice a day—once in the morning and once at night. Nighttime cleansing is the most important because it removes the buildup of the day. Morning cleansing is optional for some people, especially those with dry skin, who may simply rinse with water.

Choose a gentle cleanser that does not leave your skin feeling tight or squeaky clean. That tight feeling is a sign of over-stripping. Look for products labeled “gentle,” “hydrating,” or “cream cleanser.” Avoid harsh scrubs and exfoliating beads, which cause micro-tears in the skin. If you use an active ingredient like retinol or a chemical exfoliant, you do not need a physical scrub.

How Do We Take Care of Your Skin With Moisturizer?

Moisturizer works by trapping water in the skin. It does not add water to the skin; it prevents water loss. This is why moisturizer works best when applied to damp skin, right after cleansing or showering. The water on your skin gets locked in by the moisturizer.

Even people with oily skin need a moisturizer. When oily skin is stripped of moisture, it can produce even more oil to compensate. A lightweight, oil-free moisturizer is appropriate for oily skin. People with dry skin should look for thicker creams containing ingredients like ceramides, hyaluronic acid, or glycerin. These ingredients are proven to support the skin barrier and hold moisture in the skin.

Apply moisturizer within a few minutes of cleansing. Waiting too long allows the skin to dry out before you seal in the moisture. This simple timing habit makes a noticeable difference in how hydrated your skin feels.

Which Ingredients Actually Have Evidence Behind Them?

The ingredient list on skin care products can be overwhelming. Most ingredients have little to no clinical evidence supporting their claims. A few, however, are well studied and have clear benefits.

Retinoids are the most studied anti-aging ingredients. They are derived from vitamin A and work by speeding up cell turnover and stimulating collagen production. Over-the-counter retinol is weaker than prescription retinoids like tretinoin, but it still works. Retinoids can cause irritation and sun sensitivity, so they should be used at night and always paired with sunscreen in the morning.

Vitamin C is an antioxidant that neutralizes free radicals from UV exposure and pollution. It also helps brighten skin and fade dark spots. The evidence for vitamin C in skin care is solid, though the ingredient is unstable and degrades quickly in light and air. Look for products in opaque, airtight packaging.

Niacinamide, a form of vitamin B3, supports the skin barrier and reduces inflammation. It is well tolerated by most skin types and pairs well with other active ingredients. Research shows it helps with redness, enlarged pores, and uneven skin tone.

Hyaluronic acid is a humectant that draws water into the skin. It is naturally present in the body and holds up to 1,000 times its weight in water. When applied topically, it plumps the skin temporarily by increasing hydration.

Ingredients like peptides, growth factors, and plant stem cells have some promising early research, but the evidence is not as strong. They are not proven to work as well as retinoids, vitamin C, or sunscreen. Treat them as optional additions, not necessities.

What Role Does Diet Play in Skin Health?

Your skin is an organ, and like all organs, it depends on the nutrients you consume. A diet rich in fruits, vegetables, and healthy fats provides the vitamins and antioxidants your skin needs to repair itself. There is no single “superfood” that will transform your skin, but overall dietary patterns matter.

Some research suggests that a diet high in sugar and refined carbohydrates can accelerate skin aging. This happens through a process called glycation, where sugar molecules bind to collagen and make it stiff and brittle. The evidence for this in humans is still developing, but it aligns with what we know about inflammation and aging.

Hydration is important, but drinking extra water beyond your normal intake will not visibly change your skin. If you are dehydrated, your skin will look dull. Once you are adequately hydrated, more water does not add benefit. The idea that you need to drink a specific number of glasses for glowing skin is not supported by evidence.

Omega-3 fatty acids, found in fish, walnuts, and flaxseed, have anti-inflammatory properties. Some studies suggest they may help with inflammatory skin conditions like acne and eczema. The evidence is modest but supportive.

Does Sleep and Stress Really Affect Your Skin?

Yes, and the connection is stronger than most people realize. During deep sleep, the body releases growth hormone, which stimulates cell repair and collagen production. Chronic sleep deprivation is linked to increased signs of aging, including fine lines, uneven pigmentation, and reduced skin elasticity.

Stress triggers the release of cortisol, a hormone that increases oil production and inflammation. This can worsen acne, eczema, and psoriasis. Stress also impairs the skin barrier, making it harder for skin to retain moisture and recover from damage. Managing stress through exercise, meditation, or therapy is not just good for your mental health—it shows up in your skin.

When Should You See a Dermatologist?

Most daily skin care can be managed at home. But some conditions require professional care. Persistent acne that does not respond to over-the-counter products, suspicious moles, severe eczema, or sudden changes in your skin should all be evaluated by a dermatologist.

Annual skin checks are recommended for adults, especially those with a history of sunburns, tanning bed use, or a family history of skin cancer. A dermatologist can identify concerning lesions that you might miss and can provide prescription treatments that are stronger than anything available over the counter.

Cosmetic procedures like chemical peels, microneedling, and laser therapy are performed by dermatologists and plastic surgeons. These treatments have evidence behind them, but they are not necessary for healthy skin. They are options for people who want to address specific concerns like deep wrinkles, scars, or significant sun damage.