When should you start caring for aging skin in your 20s?

In your twenties, start caring for aging skin by applying sunscreen every day. If you're barely into your twenties and already wondering whether it's time to do something about aging skin, the answer is simpler than the marketing makes it sound. Starting early isn't about erasing lines you already have. It's about losing less of what you've still got. The collagen in your skin tapers off with age, and sun exposure speeds that loss up. So the job right now isn't to pile on expensive actives. Protect the essentials in order: sun protection first, then moisture and barrier, and only then add a proven ingredient or two.

Does collagen really start dropping in your twenties?

The firmness and thickness of your skin rest on collagen in the dermis. It doesn't vanish overnight. As skin ages, it makes less new collagen, and the fibers it already has break into fragments (Varani et al., 2006). Figures like "one percent a year" or "exactly from twenty-five" are unconfirmed. We couldn't confirm from primary research the exact age at which collagen starts to decline. Which means twenty-something skin isn't so much "problem-free yet" as "the stage where you have the most left to protect." For how firmness in the cheeks ties back to collagen, see cheek firmness and collagen.

Why does sun protection come first?

Left alone, that natural decline is gradual. What turns it sharp is what you add on top. Ultraviolet light switches on the enzymes that break collagen down, so you make less and lose more at the same time (Fisher et al., 2002). Much of what we read as visible aging, the fine lines, the slackening, the uneven tone, is widely understood to owe a large share to accumulated sun exposure rather than age itself. That's why the first move in an early start is sun protection, not a serum. It matters even more around the eyes, where thin skin shows the wear first. For how to think about early lines there, see fine lines around the eyes in your twenties.

Is starting early about losing less, not erasing?

The language around aging skin tends to poke at your anxiety, as if there's already something to reverse. For someone in their twenties, though, the realistic goal isn't reversal. It's holding on. Starting early means losing less, not erasing. One sunscreen applied every day, one habit you don't overdo, can add up to a real difference. And plenty leaks out through habits, not just what's in the jar. Hours spent with your head bent over a screen leave their own mark on the neck, for instance. That one gets its own piece: neck lines and looking down.

What should a twenties routine tackle first?

An early routine has a clear order of priority. The later an item comes, the closer it gets to "nice to have."

First comes sun protection. UV speeds up collagen breakdown (Fisher et al., 2002), so apply generously each morning and top up through the day. Next come moisture and barrier: when skin is dry and its barrier is frayed, no active can do its job well. Only once those two are steady should you add a proven ingredient. The one most often named is a retinoid. In a trial on older adults' arms, retinol improved fine wrinkles (Kafi et al., 2007). That result wasn't shown in skin in its twenties. The order is sun protection, then moisture and barrier, then a proven active. If you want to run vitamin C and retinol together, sequence and strength matter, which is covered in using vitamin C and retinol together.

Is loading up on products the answer?

Deciding to start often sends people the opposite way: more serums, more steps, and skin that can turn reactive from all of it. Collagen declines with age and UV speeds that up, so the task is subtraction, not addition. Rather than piling on out of worry, keep the core and cut the rest. Protect with sunscreen daily, keep moisture and barrier intact, and when there's room, add one retinoid slowly.

One thing today

• Start by applying enough sunscreen every morning. UV switches on the enzymes that break down collagen (Fisher et al., 2002). Around midday, check the mirror and reapply where sweat or a mask has rubbed it off. If the area stings or reddens, switch products, and if it continues, see a dermatologist.
• Moisturize every day after cleansing to look after your barrier. How much moisturizing helps skin in your twenties hasn't been tested in a trial. After applying, touch your skin to check for remaining tightness or flaking. If redness or itching persists, see a dermatologist.
• When there's room, add one retinoid, starting at a low strength and going slowly. Retinol's effect on fine wrinkles was shown on older adults' arms (Kafi et al., 2007), not in skin in its 20s. The morning after applying, check for stinging or flaking. If redness and stinging don't settle, stop and see a dermatologist.