Versus

Principia Serum Facial AH-2 Versus The Ordinary Retinol 0.5% in Squalane

Serum
Serum
Brazilian Brand Brazil
Canadian Brand Canada

Updated on March 04, 2025

Overview

What they are

These products are both vegan, cruelty-free, and reef safe serums. They have a total of 0 ingredients in common

Suited For

They're both likely to be good for dry skin and brightening skin

Free From

They both do not contain any harsh alcohols, common allergens, fragrances, parabens, silicones or sulfates

We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.

Ingredient Info

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About this product

About this product

At a glance

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Benefits

Key Ingredients

Benefits

Concerns

When to use

27 Routines
52% use in am
48% use in pm
93% use every day
When to use See routines that use it ->
776 Routines
6% use in am
94% use in pm
69% use every day
When to use See routines that use it ->

Reviews

Here's what our community thinks

Principia Serum Facial AH-2 13 ingredients

5.0 /5
from 1 rating
Absorbs Well (1) Great Value (1) Hydrating (1)
wthtay's avatar

Taynara Motta

7 months ago
Review

It's a good hydration boost! It didn't cause me any skin issues, it's easily absorved and it's not sticky.

#great value
#hydrating
#absorbs well
#no scent

The Ordinary Retinol 0.5% in Squalane 8 ingredients

3.6 /5
from 5 ratings
Great Value (3) No Scent (3) Oily (3)
CaroleD's avatar

CaroleD

1 year ago
Review

It’s a great value but it’s definitely like rubbing pure oil on your face, squalane breaks me out apparently.

I don’t like the feeling of oil on my face, it’s just too much for me.

#great value
#hydrating
#broke me out
#heavy
Ninamujer's avatar

Nina

3 years ago
Review

Like the texture
I've tried a lot of retinols and liked the texture of this one the most