If your skin is feeling dry and tight, we recommend applying Skin Mercy to calm and soothe, then layering Instant Angel Lipid-Rich Firming Moisturizer to lock in moisture.

Yes, you can. Air Angel Peptide Plumping Gel Cream is ideal for oily or acne-prone skin, as it provides lasting hydration without clogging pores. Layer Skin Mercy on top to calm and soothe dry or irritated skin, or layer Instant Angel on top for lipid-rich hydration and to lock in moisture.

Layering your products in the correct order is key to getting the most out of your routine. To keep it simple, follow the “thinnest to thickest” rule. Lightweight, water-based products like toners and serums should go on first, while richer creams and oils come later. This allows each product to absorb properly before you go in with the next.

Every Dieux product goes through a rigorous testing process to ensure safety, stability, and proven results, no shortcuts. We start with stability testing to confirm the formula holds its texture, color, and active ingredient potency over time, followed by compatibility testing in the final packaging to make sure the product performs as intended from first use to last.

Next, we conduct safety testing, including:
1.) HRIPT to ensure the product is non-irritating
2) PET to confirm preservatives protect against mold, yeast, and bacteria
3) Non-comedogenic/non-acnegenic testing to ensure it won't clog pores or trigger breakouts
4) Ocular safety testing (even for products not intended for eyes) as a precaution

For performance, we run clinical efficacy testing via third-party labs using trained graders and advanced skin analysis tools, alongside consumer perception studies to gather real-world feedback.

All third-party testing is conducted at independent, validated labs to ensure unbiased results. The exact timeline varies by product, but most formulas undergo the full suite of tests before launch, ensuring every claim we make is backed by both science and user experience.

At Dieux, we try to avoid unnecessary waste, opting for recycled or low-impact materials whenever possible. We like to call it making “better trash.” Because while sustainability is a moving target, it's one we'll always aim for.

We design products to be fully recyclable or reusable (like our Forever Mask, meant to replace single-use sheet masks), and we choose lightweight packaging to help lower shipping emissions. As a small team, we know all consumption has a footprint, so we conduct bi-quarterly packaging reviews to keep improving and adopt new innovations as they become available. Always aiming to Dieux better.