Allies of Skin CE15 Brightening & Firming Oil: Guru Score 86%

What the experts use it for.

The concerns the experts tie this product to, in their own words. Paid and founder takes don't count.

Dark spots and post-acne marks1 expert

“If you're impatient and want the glow up, want to fade hyperpigmentation, and want to boost collagen, this will do it for you.”

Mad About Skin, watch at 14:21

Melasma1 expert

“And also if you want your skin, there have been a lot of studies that have been shown that if you have for example melasma, it's good to use vitamin C twice a day.”

Skin Obsessed Mary, watch at 34:03

Dull skin1 expert

“On the nights that I'm not using my retinoid I reach for this one here just for the extra anti-aging benefits and the skin brightening benefits.”

Dr Alexis Stephens, watch at 8:45

Calming retinoid irritation1 expert

“I've also recently learned by combining this with the retinoid actually increases the effectiveness of the vitamin A so that's a bonus.”

Skin Obsessed Mary, watch at 6:50

What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Yay takes Nay takes Mixed takes Hide sponsored

Mad About Skin

734k subs

✓Yay

"This is one of the quickest acting vitamin Cs you'll ever find. If you're impatient and want the glow up, want to fade hyperpigmentation, and want to boost collagen, this will do it for you. The old formula [...] worked in as little as two weeks to help get on top of hyperpigmentation. The new formula is if anything a little bit quicker and they've used citrus cells additional to the existing formula to boost everything. It is one of the best vitamin Cs you will ever use."

All 3 takes from Mad About Skin

HOTTEST NEW ANTI AGING SERUM - This Changes Everything

"This is the Allies of Skin firming oil. This actually has a vitamin C derivative, it has a beautiful dose of antioxidants, you've got some pro-collagen ingredients here too, and it packs a punch when it comes to hydration. This is like a one-stop shop for your morning skincare, perfect for [...] those other serums. Now this one isn't the cheapest product on the market."

5 YEARS YOUNGER INSTANTLY - Fastest Acting Anti Aging Skincare

"This is a nighttime treatment so use this in your evening skincare routine and then when you wake up the following morning [...] your skin is soft, supple, glowing to the gods and you just have that lit from within radiance. It works after just one application and it all comes down to how amazing the formulation is. We've got a blend of different oils in here which are going to deeply nourish and hydrate as we sleep but it also has some great brightening components to it."

Greatest SKINCARE BRAND 2026 - 3 Brands That Changed It All

"This is one of the quickest acting vitamin Cs you'll ever find. If you're impatient and want the glow up, want to fade hyperpigmentation, and want to boost collagen, this will do it for you. The old formula [...] worked in as little as two weeks to help get on top of hyperpigmentation. The new formula is if anything a little bit quicker and they've used citrus cells additional to the existing formula to boost everything. It is one of the best vitamin Cs you will ever use."

Dr Alexis Stephens

582k subs

✓Yay

"I've started adding in vitamin C even at night and the one I've been loving is this one here by Allies of Skin, it's the CE15 Brightening & Firming Oil. So not only does it have THD but it also has phycocyanin and CoQ10. On the nights that I'm not using my retinoid I reach for this one here just for the extra anti-aging benefits and the skin brightening benefits. This is a little bit pricey."

Gothamista

683k subs

✓Yay

"This is such a fast-absorbing and lightweight oil serum that it disappears. It really doesn't feel like an added layer. It's one of the lightest oil serums I've ever tried. This sits in a base of rosehip oil, which is a dry oil but it's also full of vitamin A. There's a beautiful blend of nine cold-pressed oils as well as a vitamin C derivative that's great for brightening the skin and evening out the skin tone, vitamin E, [...] as well as one percent Bacchochiol and CoQ10."

Skin Obsessed Mary

33k subs

✓Yay

"The C15 oil, always an oil at night, that's my non-negotiable, really that's the best thing I can do. And also if you want your skin, there have been a lot of studies that have been shown that if you have for example melasma, it's good to use vitamin C twice a day. So in the morning I like to use a vitamin C serum, at night I like to use a vitamin C oil."

What the evidence says.

Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

Frequently asked.

What is Allies of Skin CE15 Brightening & Firming Oil?

A nighttime facial oil serum that combines a vitamin C derivative with antioxidants and a blend of plant oils, designed to brighten, firm and hydrate the skin.

Is Allies of Skin CE15 Brightening & Firming Oil worth it?

Yes. All 4 gurus who reviewed it give it their stamp of approval, for a Guru Score of 86%.

What is Allies of Skin CE15 Brightening & Firming Oil's Guru Score?

Allies of Skin CE15 Brightening & Firming Oil holds a Guru Score of 86%. That is our read on how warmly the experts talk about it, based on the verdicts of 4 expert reviewers we have collected.

Who is Allies of Skin CE15 Brightening & Firming Oil best for?

Allies of Skin CE15 Brightening & Firming Oil is generally suited to mature skin.

What is Allies of Skin CE15 Brightening & Firming Oil good for, according to the experts?

In their reviews, experts say Allies of Skin CE15 Brightening & Firming Oil is good for dark spots and post-acne marks (1 expert), melasma (1 expert), dull skin (1 expert) and calming retinoid irritation (1 expert).