Soothing & Sensitive Skin OEM: The Claim Decides the Formula

Every soothing brief we receive arrives with a concentration question. How much centella. How much menthol. What percentage of capsaicin for a warming product. These are the wrong questions to lead with, and the reason is structural: in this category the regulatory risk does not sit in the concentration column. It sits in the verb.

A cooling leg spray at 2% menthol is a cosmetic in the United States if it says refreshing. The same bottle, same formula, same 2%, becomes an unapproved drug if it says relieves pain. Nothing in the batch record changed. One word did.

This is the part of a soothing and sensitive skin OEM project that most briefs underestimate, and it is where a supplier either protects you or quietly hands you a registration problem. What follows is how we scope these projects, which claims we will not write regardless of who asks, and where the concentration conversation actually belongs.

Why Claim Language Outranks Concentration in This Category

Soothing products sit closer to the drug boundary than almost any other cosmetic line. The reason is that the sensations they deliver — cooling, warming, tingling — are the same sensations that topical analgesic drugs deliver. Regulators therefore separate the two categories not by what is in the bottle but by what the label says the product is for.

The clearest illustration is in the US non-monograph list. Under 21 CFR 310.545, FDA identifies active ingredients that lack adequate data to be generally recognised as safe and effective for particular OTC uses. Several ingredients common in soothing and warming formulas appear there:

• Capsaicin and capsicum oleoresin — listed under fever blister and cold sore treatment products
• Menthol exceeding 1 percent and camphor exceeding 3 percent — same listing
• Menthol — also listed under dandruff/seborrheic dermatitis/psoriasis products, and under topical antifungal products
• Eucalyptus oil — listed as a counterirritant under external analgesic products

Read that list carefully, because it is routinely misread. It does not say menthol above 1% is banned from cosmetics. It says that if you offer a product OTC for those therapeutic uses, those ingredients at those levels are not covered by a monograph. The trigger is the claimed use. A 2% menthol body spray sold for a cooling sensation is not touched by that provision at all. The same product sold to treat a skin condition is.

Which is why we start every soothing project with the claim set, then design the formula to fit it. Doing it in the other order produces a formula that works and a label you cannot use.

The Cooling Line: Menthol Tiers and the One Claim That Changes Everything

We work menthol in three tiers, and the tier follows the intended sensory outcome and the application area rather than a market cap.

• Supporting tier — 0.05 to 0.3%, baseline 0.1%. Slight cooling plus odour modification. This is the only tier we use for facial products. Eye area and mucous membrane irritation is the single largest complaint source for menthol, and it scales quickly.
• Hero tier — 0.3 to 1%, baseline 0.5%. A defined cooling sensation. This is the working range for shampoos and body wash where cooling is a stated product feature.
• High tier — 1 to 3%, baseline 2%. Strong cooling for neck, shoulder, leg and foot applications, and for cold-sensation body contouring formats.

Our Cooling Leg & Foot Herbal Spray and the Cooling Roll-On Herbal Relief for neck and shoulder both sit in that high tier, because the format only makes sense if the cooling is unmistakable. Both ship at 2,000–3,000 bottles per SKU on a 45–55 day lead time.

The claim rule for the entire cooling line is short. Sensation language is available to us: cooling sensation, refreshing, a cool, light finish. Therapeutic language is not: pain relief, anti-itch, analgesic. There is no concentration at which the second list becomes safe, and no market where we will write it into a cosmetic label.

One additional market note that catches brands out: in the EU, menthol and camphor are among the terpenes covered by specific restriction decisions for products intended for children under three. If your range includes a children's line, that is a formulation constraint, not a labelling one, and it needs to be raised at the brief stage.

The Warming Line: Capsaicin at Parts-per-Thousand, and Why the Ceiling Is Low

Warming formulas run on capsaicinoids, and the working concentrations are far lower than most briefs assume. Calculated as pure capsaicin:

• Supporting tier — 0.001 to 0.01%, baseline 0.005%. A hint of warmth.
• Hero tier — 0.01 to 0.05%, baseline 0.025%. The working range for warm-up balms, neck and shoulder massage products, and body contouring creams where heat is the point.
• High tier — 0.05 to 0.1%, baseline 0.05%. Professional massage lines only. Strong burn, and it must ship with small-area patch guidance and a wash-hands-after-use instruction.

For context on why the cosmetic ceiling sits where it does: in the US, 8% capsaicin is a prescription drug product. The gap between a cosmetic warming sensation and a pharmaceutical intervention is nearly two orders of magnitude, and staying well inside the lower end is what keeps the product a cosmetic.

Our Warming Muscle Relax Herbal Liquid is built in the hero tier. The claim set says warming and relaxation. It does not say it treats muscles, and it does not reference pain, because a warming cosmetic is not for diagnosing, treating or relieving anything. That sentence is not legal caution for its own sake — it is the difference between a cosmetic notification and a drug filing.

Where Arnica and Tea Tree Get Brands Into Trouble

Two botanicals carry claim baggage far heavier than their formulation difficulty.

Arnica. The traditional-use vocabulary attached to arnica is almost entirely therapeutic: reduces swelling, relieves bruising, eases pain. All of it is unusable on a cosmetic label. We formulate arnica on an as-supplied basis and write it into soothing and comfort language only. If a brief needs the bruise-and-swelling story, that brief needs a different regulatory route, not a different supplier.

Tea tree. The claim brands reach for is antibacterial, and it is the one we will not write. Tea tree in a cosmetic carries oil-control, pore-cleansing and refreshing language: helps control excess oil, helps visibly reduce the look of congestion, clean, fresh finish. An antibacterial claim moves the product toward a drug or biocide framework depending on the market, and it invites a substantiation demand the finished product cannot meet.

The same discipline applies to citronella. A citronella product that claims to repel insects is not a cosmetic in most jurisdictions — repellency generally sits under pesticide or biocidal product registration, which is a separate and considerably more expensive path. Our Citronella Soothing Herbal Liquid is scoped and written as a fragranced soothing product. Brands that want a registered repellent need to budget for the registration, and they need to know that before tooling.

Centella: Get the Basis Right Before You Compare Numbers

Centella is the backbone of most soothing ranges, and it is also where concentration figures become meaningless without a stated basis. Centella reaches formulators in three materially different forms, and a number quoted against one form can be dozens of times larger or smaller than the equivalent against another. We covered the three-material problem in detail in our barrier repair OEM guide, and the same rule governs here: never compare a centella percentage until you know which material it refers to.

In practice our soothing range is built on an extract basis, and we state that on every page:

• Centella Soothing Repair Toner — baseline 3%, range 2–5% (extract basis), 150ml, 35–45 days
• Centella Repair Serum — baseline 3%, range 2–5% (extract basis), with a TECA-basis option at baseline 0.3% and a 90%-assay glycoside option at 0.05–0.3%, final level per supplier TDS
• Centella Soothing Repair Cream — baseline 2%, range 1–3% (extract basis), 30ml or 50ml jars
• Centella Soothing Repair Mask — baseline 3%, range 2–5% (extract basis), 25–30ml per sheet
• Centella Soothing Body Lotion — baseline 2%, range 1–3% (extract basis), 300ml or 500ml

All of these are adjustable. Brands working to a tighter cost target routinely come down within the range, and brands wanting a standardised-glycoside story move to the TECA or high-assay option instead of raising the extract percentage. Whichever route you choose, the level has to be compliant in your destination market, and confirming that is part of the project rather than an afterthought.

What the EU Common Criteria Actually Require of a Soothing Claim

Brands selling into the EU or UK often treat claim compliance as a list of forbidden words. It is not. Commission Regulation (EU) No 655/2013 lays down six common criteria, and three of them bite hard on soothing products specifically.

Truthfulness. An ingredient claim referring to the properties of a specific ingredient must not imply that the finished product has those properties when it does not. Putting 0.1% centella in a cream and then telling the centella story at full volume is exactly the pattern this criterion exists to stop.

Evidential support. A claim that extrapolates ingredient properties to the finished product has to be backed by adequate and verifiable evidence — the regulation names demonstrating the presence of the ingredient at an effective concentration as an example. This is the provision that turns your concentration decision into a claims decision. If you want the soothing story, the level has to support it.

Legal compliance. Claims that a product has been authorised or approved by a competent authority in the EU are not allowed, and neither are claims presenting mere compliance with minimum legal requirements as a specific benefit. In practice this rules out two things we see constantly in this category: EU approved on an ingredient that merely appears in CosIng, and treating the absence of a restricted ingredient as a headline benefit.

One more from the honesty criterion, because it is the one brands find most inconvenient: claims must not attribute unique characteristics to a product if similar products share them. A soothing cream is not uniquely gentle because it contains centella. Almost all of them do.

The Claim Swap Table: What We Change and Why

Most briefs arrive with therapeutic language in them, not out of carelessness but because that is how the benefit is described in everyday speech. The work is translation rather than deletion. Below is the substitution set we apply, and the reason each one moves.

Claim in the brief	What we write instead	Why it moves
Relieves pain / analgesic	Cooling sensation, refreshing	Pain relief is a therapeutic indication; it defines the product as a drug regardless of concentration
Anti-inflammatory	Helps soothe the look of redness	Inflammation is a physiological process; the EU criteria treat medical claims as outside the cosmetic framework
Antibacterial (tea tree)	Helps control excess oil, pore-cleansing	Moves toward drug or biocide framework depending on market, and demands substantiation on the finished product
Reduces swelling / bruising (arnica)	Comforting, soothing on tired areas	Traditional-use vocabulary for arnica is therapeutic throughout
Treats muscle soreness	Warming, supports relaxation	Treatment language on a cosmetic notification is a filing mismatch
Repels mosquitoes	Citronella-fragranced, soothing	Repellency generally requires pesticide or biocidal registration, not cosmetic notification
Anti-itch	Helps skin feel calmer	Antipruritic is a drug indication; the US non-monograph list is built around exactly these uses
Clinically proven soothing	Assessed in-house / per project testing	Published studies were run on other products; the evidence must be relevant to your finished formula
EU approved centella	Centella at a level compliant in your market	655/2013 explicitly disallows claiming authority approval, and CosIng listing is not approval

Two patterns are worth pulling out of that table. First, the swap almost never costs you the selling proposition — cooling sensation sells a cooling spray perfectly well, and buyers do not need the word analgesic to understand what a menthol roll-on does. Second, several of these substitutions protect you from a substantiation demand rather than a classification problem. An antibacterial claim is not just categorically risky; it is a claim you would have to prove on the finished product, in your packaging, at your fill level.

The brands that struggle here are usually the ones that wrote the label copy before choosing the supplier, then treated compliance as a red-pen exercise at the end. Bringing the claim set into the brief instead makes the formula decisions cleaner and the timeline shorter.

Building a Soothing Range Instead of One Product

Soothing is a routine, not a single step, and the ranges that perform are built as a sequence rather than a hero SKU with satellites. A workable structure:

• Cleanse — an amino-acid surfactant system at near-neutral pH. Our Centella Soothing Cleanser covers this position at 2,000–3,000 bottles and 35–45 days.
• Tone — the highest-frequency touchpoint, and where an extract-basis centella level is most cost-efficient.
• Treat — the serum position, and the only place where a standardised-glycoside upgrade earns its cost.
• Seal — cream or lotion, where the emollient system matters more than the botanical percentage.
• Intensive — mask or targeted format, for the flare-up occasion rather than daily use.

Note the lead-time split, because it affects launch sequencing. Toners, cleansers and body lotions run 35–45 days. Serums, creams, masks and the herbal care liquids run 45–55 days, since those formats go through stability testing before production. A five-SKU range launched as one shipment moves at the slower of the two.

Questions Worth Asking Any Soothing OEM

These five separate suppliers who understand the category from suppliers who will let you walk into a problem:

1. Which centella material is your percentage quoted against? If the answer is just a number, the number is not usable.
2. Show me the claim set you would write for this formula in my market. A supplier who hands back therapeutic verbs has not done this before.
3. At what menthol level do you stop recommending facial application? A supplier without a facial ceiling has not handled the complaint side.
4. What happens to my timeline if I add a warming SKU? Capsaicinoid formulas need patch-test guidance and usage instructions drafted, not just filled.
5. Is the repellency claim in scope, and under which registration? If a supplier says yes to a repellent claim on a cosmetic notification, that is the answer you needed.

Frequently Asked Questions

Can we claim our soothing product relieves irritation?

Not in those words. Relieve sits in therapeutic vocabulary, and paired with irritation it reads as treating a condition. Workable alternatives keep the claim on appearance and sensation: helps soothe the look of redness, helps skin feel calmer, comforting on sensitised skin. The formula does not change; the claim does.

What is the maximum menthol level you will use in a face product?

0.3%, and our baseline for facial formats is 0.1%. Eye-area and mucous-membrane irritation is the dominant complaint source for menthol and it escalates fast above that. Higher levels are for body, scalp and limb formats.

Can you make a mosquito repellent?

We can make a citronella-fragranced soothing product, and that is how our citronella liquid is scoped. An actual repellency claim generally requires pesticide or biocidal product registration depending on the market, which is a separate route with its own cost and timeline. We will not put a repellency claim on a cosmetic notification.

Is a higher centella percentage better?

Not on its own, and not comparably across suppliers. A 5% extract-basis level and a 0.3% TECA-basis level are different materials doing different jobs, and the second is not weaker for having a smaller number. Decide the material first, then the level.

Why do your herbal care liquids take longer than your toners?

Herbal care liquids run 45–55 days against 35–45 for toners, because they go through stability testing before production. Sensory actives and botanical extracts in a leave-on format need that window, and compressing it is where quality problems come from.

Do you provide the claim wording, or do we?

We provide the claim set we can support for the formula and flag anything in your draft that would move the product out of the cosmetic category in your destination market. Final label copy and market registration sit with the brand owner, since the responsible person for the notification is you.

What is the MOQ for a soothing range?

2,000–3,000 bottles or jars per SKU for cleansers, toners, serums, creams, lotions and the herbal liquids. Sheet masks run 5,000–10,000 sheets per SKU. Those are per-SKU figures, so a five-piece range is five separate minimums rather than a pooled total.

Can one soothing formula run across several formats?

The actives can carry across, but the base cannot. A toner, a serum and a cream need different emollient and thickener systems, and each needs its own stability programme. Expect shared positioning and shared actives, not one formula in five bottles.

Scoping a Soothing Project

If you are working on a soothing or sensitive skin range, send the claim set you want alongside your target markets. That combination determines the formula far more than a target percentage does, and it surfaces the registration questions early rather than after tooling. Request a quote with your format list and destination markets and we will come back with the levels we would run and the claims each one supports.