The Ordinary Azelaic Acid Suspension 10%

What it is

The Ordinary Azelaic Acid Suspension 10% is a silicone-based, anhydrous cream-paste that delivers a 10% concentration of azelaic acid — a dicarboxylic acid naturally occurring in grains such as wheat and barley. The suspension format keeps the active stable and allows it to spread evenly across the skin without the water-phase instability that can affect some azelaic acid formulations. It has earned a strong reputation among shoppers, sitting at 4.5 out of 5 stars across more than 7,200 reviews.

Who it's for

This product suits a wide range of skin types, including oily, combination, and normal skin. It is particularly well-matched to anyone dealing with post-inflammatory hyperpigmentation from acne, uneven skin tone, or persistent dullness that has not responded to basic moisturization alone. People with active breakouts who also want to address the dark marks left behind will find azelaic acid especially practical, since it targets both concerns simultaneously.

Those with very dry skin may find the silicone-heavy suspension texture sits uncomfortably on top of skin without a hydrating layer underneath. Individuals with known sensitivity to silicones should patch-test carefully. Anyone currently using prescription azelaic acid at higher concentrations (15–20%) should not double up without professional guidance.

How to use it

Apply a small amount — roughly a pea-sized quantity for the full face — after any water-based serums and before heavier creams or facial oils. Because the formula is anhydrous (contains no water), it fits logically between lighter hydrating layers and occlusive finish steps. Azelaic acid is stable in both AM and PM routines; however, pairing it with a broad-spectrum SPF 30+ in the morning is important, since you are actively working on hyperpigmentation and UV exposure will undermine that effort.

Start with every-other-day use if your skin is new to active ingredients. Most people tolerate a daily schedule within two to three weeks. Expect mild tingling on first application, particularly over active blemishes — this is common with azelaic acid and typically diminishes as skin adjusts. Avoid layering directly with high-strength retinoids or vitamin C in the same step until you have confirmed your skin tolerates the combination.

Key ingredients

Azelaic acid (10%): The sole active in this formula. Azelaic acid works through several well-documented pathways: it inhibits tyrosinase, the enzyme responsible for excess melanin production, which gradually fades post-acne marks and areas of uneven pigmentation. It also exerts antibacterial action against Cutibacterium acnes (formerly Propionibacterium acnes), the bacterium associated with inflammatory acne. Additionally, it has demonstrated keratolytic properties, meaning it helps normalize the shedding of dead skin cells inside the follicle — a process that contributes to clogged pores. Taken together, these three mechanisms make it one of the more versatile single-ingredient actives available over the counter.

Dimethicone and isododecane: The silicone base that makes up the suspension vehicle. These ingredients give the product its characteristic white, slightly thick consistency and help distribute the azelaic acid evenly. They do not contribute to brightening or acne control but are critical to the formula's stability and skin feel.

Pros & cons

• Addresses multiple concerns at once — hyperpigmentation, active breakouts, and uneven texture in a single step.
• Generally well-tolerated — azelaic acid has a long safety record and is considered suitable for sensitive skin when introduced gradually.
• No hydroquinone, no retinol — useful for those who cannot use or prefer to avoid those ingredients.
• Fragrance-free — appropriate for reactive skin types.
• Works in both AM and PM routines without the photosensitivity risk associated with retinoids.

• Thick, paste-like texture — can pill under makeup if not fully absorbed or if layered over silicone-heavy primers.
• Tingling on first use — noticeable over broken skin or active lesions; may feel uncomfortable for those new to actives.
• Results are gradual — fading of established hyperpigmentation typically takes eight to twelve weeks of consistent use.
• Silicone base may not suit very dry skin without adequate hydration applied first.

How it compares

Azelaic acid and vitamin C both target hyperpigmentation, but through different mechanisms and textures. TruSkin Vitamin C Serum with Hyaluronic Acid & Vitamin E is a water-based serum that works primarily through antioxidant activity and direct tyrosinase inhibition via L-ascorbic acid; it also adds hydration through hyaluronic acid, making it more comfortable for dry skin types. Vitamin C is better suited to daytime brightening and antioxidant defense, while azelaic acid's antibacterial action gives it an edge for acne-prone skin. The two can be used in alternating routines once your skin is acclimated, but layering them in the same step is not necessary. If hydration is your primary gap alongside tone concerns, Tree of Life Hyaluronic Acid Serum for Face would make a logical complement applied before this suspension, rather than a substitute for it.

The verdict

The Ordinary Azelaic Acid Suspension 10% is a focused, no-frills option for anyone trying to clear breakouts and fade the marks they leave behind without adding a lengthy list of actives to their routine. The 10% concentration is meaningful — not a trace amount — and the formula is straightforward enough to layer within most existing skincare routines. The paste texture and slow-build results require patience and some experimentation with application order, but for a product targeting three distinct skin concerns through one rigorously studied active, it earns its place as a practical everyday option for oily and combination skin types.