Photoaging prevention ingredient

What is Photoaging? Everything You Need to Know

Reading: 5 minutes

Aging is something to take pride in—after all, it’s an adventure in personal growth that’s all your own. But have you ever wondered why some people look older than their years, while others seem ageless? Beyond genetics, external factors play a major role in how our skin ages.

One of the biggest culprits? Sun exposure—responsible for up to 80% of visible skin aging. So how does that show up on your skin? We spoke with Chiyoung Kang Park, ISDIN Medical Marketing Specialist, to explore how every fine line tells the story of a life well-lived. And above all, how you can help protect your skin.

Let’s dive in.

First, let’s talk sunlight

The sun gives us warmth and light—but it also emits energy in the form of solar radiation, which includes different types of rays across various wavelengths.

You’ve probably heard of the most well-known types: ultraviolet A (UVA) and ultraviolet B (UVB). But there are a few others that might not seem so familiar. All of these rays are closely tied to the aging process of the skin, especially with prolonged exposure.

Expert Tip: Of all the external factors that impact our skin—what we call the exposome—sun exposure speeds up aging more than any other.

Just what is photoaging?

Photoaging refers to skin aging caused by exposure to the sun. The prefix photo- means “related to light,” and in this case, we’re talking specifically about sunlight and other types of solar rays that aren’t visible.

Here’s how Park puts it: “Photoaging is the process where solar radiation accelerates visible signs of skin aging, like sun spots and fine lines.”

Here’s how it happens

Park shares that while UVA rays are the main contributors to photoaging, UVB, blue solar light, and infrared also play their part. And each type impacts the skin differently:

• UVA rays: “These cause long-term damage like photoaging and even skin cancer,” says Park. “They penetrate deep into the skin and damage collagen, which leads to fine lines and wrinkles.”
• UVB rays: These mostly affect the outermost layer of the skin. “They’re mainly responsible for short-term damage like sunburn,” she adds. While they play a smaller role in photoaging, UVB rays are highly energetic—making them 20 to 1000 times more damaging than UVA rays.
• Solar blue light: Another type of high-energy visible light. While research is still ongoing, Park shares that “recent studies have linked solar blue light to dark spots and uneven pigmentation, especially in deeper skin tones.”
• Infrared radiation: Better known as the warmth you feel from the sun, emerging research shows that chronic exposure to high heat may contribute to fine lines, wrinkles, and uneven tone. It’s not a form of light exactly, but Park says it’s just as important. “Sometimes, it’s even referred to as thermal aging,” she shares.

When does photoaging start?

Aging is a natural (and inevitable) process. And it’s definitely not anything to be ashamed of. Over time, your skin slows down collagen and elastin production, which leads to a loss of firmness and elasticity. But can sun exposure speed that up?

According to Park, “Sun exposure can cause visible signs of aging to appear up to 20 years earlier.” While wrinkles are nothing to fear, why invite them to show up sooner?

Can sun-damaged skin be repaired?

So, is it possible to reverse premature skin aging? Park’s answer gives us hope—and a clearer understanding of the process. To really understand what photoaging is, it’s best to first realize how it affects your skin.

Let’s look at the main signs of aging, the types of solar radiation that influence them, and the key ingredients that can help minimize them:

Fine lines and wrinkles

• Main contributor: UVA rays
• What happens: UVA radiation creates free radicals that break down collagen and elastin—the hero proteins that keep skin firm and elastic.
• How to fight back: Retinoids support natural collagen levels and boost skin renewal, helping to smooth and reduce the appearance of wrinkles.

Try: Retinal Advanced

Packed with retinal, melatonin, and bakuchiol, this nighttime serum helps renew, repair, and soothe skin.

Dark spots and uneven skin tone

Try: Melaclear Advanced

Dullness

Try: Melatonik®

Loss of firmness

Try: Age Contour

Sunscreen: the best photoaging protection

Sun protection habits: the sooner, the better

You’re right on track

Article written and reviewed by:

• Live Young
• Chiyoung Kang Park