Hailey Bieber has two defining characteristics when it comes to her sense of style and appearance. The first is a minimalist wardrobe made up of upscale versions of basic items. (I’m referring to large leather jackets, loose-fitting trousers, and white T-shirts.) A healthy-looking complexion is the second. (Each and every one of her cosmetic looks is built around bright, light-reflective skin.)

I tend to concentrate on the latter since I write about beauty. Would you blame me? Bieber is essentially the poster child for that lit-from-within appearance, and I write about skin for a job. Additionally, I put in a lot of effort to get that look for myself, so of course I’m going to pay attention when she discusses the tools and products she uses.

Imagine my pleasure when she disclosed the precise vitamin C serum she takes to keep her incredibly even complexion in a recent YouTube video. She even went so far as to refer to it as a “holy-grail” item. I knew I had to give vitamin C a try to see if it made any difference in my skin, which frequently appears dull and uneven, as it is well renowned for its brightening and anti-aging properties.

So I did that. I only recently began using it after cleansing in the morning and evening. And even though it’s only been a short while, I immediately notice my skin’s appearance has improved. See which vitamin C supplements are less well known by scrolling down

Vitamin C also functions as a powerful antioxidant that can protect against photodamage from UV rays. “In particular, it may help prevent the formation of sunspots that contribute to an uneven complexion,” Camp says.

Celebrity aesthetician Candace Marino, better known as the LA Facialist, seconds this. “Vitamin C is an antioxidant that works to protect the skin against environmental aggressors like the sun and pollution,” she explains. “It’s like a second layer of defence (after SPF) that protects the cells to prevent their breakdown. Vitamin C helps produce collagen, inhibits pigment production, evens and brightens the skin tone, and helps keep the skin soft, healthy, and radiant.”

Now, do you see why I was so psyched to learn about Bieber’s favorite vitamin C serum? While there are many effective anti-aging and brightening products out there, vitamin C is one of the very best. Its whole purpose is to give the skin that healthy-looking lit-from-within glow that I so desperately desire.