Vitamin C Suspension 30% in Silicone

The Ordinary's Vitamin C Suspension 23% + HA Spheres 2% has a texture problem. Ask anyone who has used it and they will mention the grittiness — the sensation of spreading fine sand across your face while concentrated acid stings underneath. It works, but a meaningful percentage of customers cannot bring themselves to use it consistently enough for it to matter. The Vitamin C Suspension 30% in Silicone is The Ordinary's attempt to solve this problem, and the solution is both clever and imperfect.

The formulation approach is radically different. Where the 23% version suspends ascorbic acid particles in a squalane-oil base with hyaluronic acid spheres, this product puts the vitamin C into a pure silicone matrix — dimethicone, polysilicone-11, and PEG-10 dimethicone. Four ingredients total. The result is a cream that glides on with the slip of a silicone primer, completely free of the sandpaper texture that made the 23% version divisive. If texture was your sole objection to The Ordinary's vitamin C lineup, this product removes it entirely.

But silicone comes with its own set of trade-offs, and The Ordinary is transparent about the biggest one: dimethicone partially entraps the ascorbic acid, slowing and reducing how much vitamin C actually penetrates the skin. This is why the concentration was bumped to 30% — it is not a higher dose for higher efficacy, but a higher dose to compensate for lower delivery. The actual amount of L-ascorbic acid reaching the dermis is likely comparable to the 23% version's, possibly even slightly less. You are not getting more vitamin C on your skin. You are getting the same vitamin C in a format that feels better to apply.

This distinction matters because 30% L-ascorbic acid is extremely acidic. The stinging upon application is, paradoxically, often more intense than the 23% version despite the silicone buffering. More acid means more acid, regardless of what it is suspended in. The first few seconds after application bring a sharp, attention-getting tingle that can escalate to genuine discomfort on thinner-skinned areas like around the eyes or nose. This subsides within a few minutes, but it demands the same tolerance-building approach as any high-concentration acid product: start at two to three times per week and work up.

The texture, though. The texture is genuinely pleasant. The cream has that distinctive silicone slip — smooth, almost velvety, with none of the gritty resistance of undissolved vitamin C particles. It dries down to a matte, film-like finish that feels like a lightweight primer. For users who have struggled with the 23% version's application experience, this is a legitimate upgrade in the moment of use.

The trade-off surfaces afterward. That silicone film sits on the skin, and while it does not technically clog pores — dimethicone is non-comedogenic and allows gas exchange — it does create a barrier that slows absorption of anything you layer on top. Water-based serums applied after this product may not penetrate as effectively. The practical implication is that this needs to be the last active step in your routine, followed only by moisturizer. If you have a multi-step evening routine with several serums, the silicone base disrupts the layering order.

The ingredient list — just four components — is minimal to the point of being stark. There are no moisturizing agents, no humectants, no antioxidant synergists. Unlike the 23% version, which includes squalane for conditioning and hyaluronic acid spheres for hydration, this formula is nothing but vitamin C and the silicone needed to deliver it. For dry skin types, this means the product provides no moisture relief — and the acidic L-ascorbic acid can actually feel drying underneath the silicone film. A good moisturizer after application is not optional; it is essential.

The absence of vitamin E and ferulic acid is the same limitation shared by the 23% version, and it bears repeating. The gold-standard vitamin C research demonstrates dramatically enhanced photoprotection when L-ascorbic acid is combined with these two antioxidants. Neither of The Ordinary's vitamin C suspensions includes them, which means both products are delivering vitamin C in isolation rather than in the synergistic combination supported by the strongest clinical evidence.

The Ordinary has offered this product since approximately 2017, and its reception has been consistently mixed — better ratings than the 23% version on texture, worse ratings on efficacy perception. Users who switch from the 23% to the 30% often report that results take longer to appear or feel less dramatic, which aligns with the reduced bioavailability hypothesis. The product has found its audience among those who prioritize comfort and compliance: a vitamin C you actually use every night, even at reduced efficiency, delivers more cumulative benefit than a vitamin C you abandon after a week because you hate applying it.

At $7.50, the value proposition is strong for what you are getting — 30% pure L-ascorbic acid in a stable, water-free base. The formula will not oxidize or degrade the way aqueous vitamin C serums do. But the real question this product poses is not about price. It is about priority. Do you want the vitamin C that feels better going on, or the vitamin C that works more efficiently once it is there? The Ordinary, to its credit, offers both options and lets you decide.

Formula

The Science

The formulation philosophy behind this product involves a deliberate trade-off between skin delivery and stability. L-ascorbic acid is hydrophilic — it dissolves in and is best delivered through aqueous solutions at low pH. Dimethicone, by contrast, is a hydrophobic silicone polymer that creates a non-polar matrix around the ascorbic acid particles. Published research on silicone-based delivery systems confirms that while dimethicone provides excellent stability and a cosmetically elegant feel, it reduces the rate and extent of active ingredient release compared to oil-in-water or anhydrous non-silicone vehicles.

The 30% concentration addresses this reduced bioavailability through simple dose escalation. However, clinical research by Pinnell and colleagues, published in Dermatologic Surgery in 2001, demonstrated that skin saturation of L-ascorbic acid occurs at approximately 20% in aqueous formulations. Whether the same saturation curve applies when the delivery vehicle is silicone-based has not been specifically studied in published literature, leaving a gap in the evidence base for this particular formulation approach.

The absence of vitamin E (tocopherol) and ferulic acid from this formula is a notable omission. Pinnell's landmark 2005 study in the Journal of Investigative Dermatology showed that adding 1% vitamin E and 0.5% ferulic acid to a 15% L-ascorbic acid solution doubled its photoprotective capacity. The synergistic mechanism involves ferulic acid stabilizing and regenerating oxidized vitamin C and E, creating a self-reinforcing antioxidant network. Without these partners, the L-ascorbic acid in this product operates as a solo antioxidant, which is still beneficial but does not achieve the enhanced protection documented in the C+E+ferulic research.

Dimethicone itself is well-studied as a dermatological vehicle. It is classified as a skin protectant by the FDA, forms a breathable, non-comedogenic film, and has been shown in published research to support barrier function without occluding the skin. The concern is specifically about active ingredient delivery, not about the safety or dermatological suitability of the silicone base itself.

References

1. Topical Vitamin C and the Skin: Mechanisms of Action and Clinical Applications — Journal of Clinical and Aesthetic Dermatology (2017)
2. Ferulic Acid Stabilizes a Solution of Vitamins C and E and Doubles its Photoprotection of Skin — Journal of Investigative Dermatology (2005)

Dermatologist Perspective

Dermatologists generally view silicone-based vitamin C delivery as a viable option for patients who cannot tolerate the texture of traditional suspensions, though they note the bioavailability compromise. Board-certified dermatologists emphasize that compliance is a critical factor in vitamin C efficacy — a product that a patient actually uses nightly delivers more cumulative benefit than a theoretically superior product abandoned after a week. For patients considering this product, dermatologists typically recommend it as an alternative for those who have failed to maintain consistency with grittier formulations, while noting that aqueous vitamin C serums at 15-20% with vitamin E and ferulic acid remain the gold standard in the clinical literature.

Guidance

Created as a direct response to the texture complaints that plagued The Ordinary's original 23% Vitamin C Suspension. Rather than simply smoothing out the original formula, DECIEM took a fundamentally different approach — suspending the vitamin C in silicone rather than squalane-based oils. The 30% concentration is not an attempt to outdo the 23% but rather to compensate for the silicone's barrier effect on absorption.

About The Ordinary Established Brand (5–20 years)

The Ordinary launched in 2016 under DECIEM and rapidly became one of the most influential skincare brands by offering clinical-grade ingredients at transparent, accessible price points. This product was designed as a smoother-textured alternative to the brand's original gritty 23% Vitamin C Suspension.

Brand founded: 2016 · Product launched: 2017

Myth vs. Reality

Myth

30% vitamin C is more effective than 23% vitamin C

Reality

The higher concentration here compensates for the silicone base reducing penetration. The actual amount of L-ascorbic acid reaching the skin is likely similar to the 23% version. Clinical research suggests skin saturation of L-ascorbic acid occurs around 20%, above which additional concentration offers diminishing returns.

Myth

Silicone-based products clog pores and prevent skin from breathing

Reality

Dimethicone forms a breathable film that allows gas and moisture exchange. It is non-comedogenic and widely used in dermatological products specifically because it protects without occluding. The concern is not clogging but rather that the silicone layer may slow absorption of subsequently applied products.

FAQ

Common Praise

"Smooth, non-gritty texture is a major improvement over the 23% version"

"Exceptional value for a 30% L-ascorbic acid product at $7.50"

"Four-ingredient formula minimizes risk of reactions to inactive ingredients"

"Noticeable brightening and improved skin tone with consistent use"

"Stable water-free formula that doesn't oxidize"

Common Complaints

"Significant tingling and stinging from the extreme 30% acid concentration"

"Silicone base feels occlusive and can interfere with other product absorption"

"Reduced vitamin C penetration compared to aqueous formulations at lower concentrations"

"No moisturizing or hydrating ingredients — skin can feel dry underneath the silicone film"

"Still has a noticeable acidic odor despite the silicone base"

Appears In

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Related Conditions

hyperpigmentation dullness aging sun damage dark spots

Related Ingredients

vitamin c dimethicone