A serum is a format, not a regulatory category
— and that one fact changes how you pick a private label serum
manufacturer. The word “serum” tells a factory nothing about whether your
product is a cosmetic or an over-the-counter drug; the claims on your label
decide that. A vitamin C, hyaluronic acid, niacinamide or peptide serum is a
cosmetic, but a salicylic acid serum carrying an acne treatment claim is an OTC
drug and needs a different class of manufacturer entirely. On top of that, serums are
technically unforgiving — active stability, pH and packaging make the
factory’s formulation competence matter more than it does for a simple
moisturizer. Sort the regulatory question first, then judge who can actually
make your formula stable.
If you already know how white label, private label and contract manufacturing
differ — and if not,
start
there — you know the commercial model. This piece is about what changes
when the product is a serum rather than a moisturizer or a body wash. Most of the
decision is the same. But a few serum-specific facts catch founders who assume
the skincare playbook transfers cleanly, and one of them — the
cosmetic-versus-drug line — can put your launch on the wrong regulatory
path before you have picked a bottle.
Is your serum a cosmetic or an OTC drug?
This is the first question, and it is decided by the claims on your label, not
by the liquid in the bottle. Under United States law a product is a
cosmetic if it is intended to cleanse or beautify or support the
appearance of the skin, and a drug if it is intended for the
treatment or prevention of a condition. Most serums are cosmetics. A vitamin C serum that “supports
the appearance of brighter, firmer skin”, a hyaluronic acid serum that “helps
skin retain moisture”, a niacinamide or peptide serum that “supports the
appearance of a smoother complexion” — all cosmetics, making
structure-function claims only.
The line moves the moment you make a treatment claim on a drug active. The
clearest case is salicylic acid: a salicylic acid serum carrying an acne
treatment claim on its label is an over-the-counter drug under
the FDA acne monograph,
21 CFR Part 333. An OTC drug serum is a different
manufacturing project: it must be made under OTC drug current Good Manufacturing
Practice
(21 CFR Part 211), by a facility with a drug establishment
registration, and it carries a Drug Facts panel on the label. Most cosmetics
contract manufacturers — Moe’s Group, the contract manufacturer that
supports this publication, included — are set up as cosmetics facilities
under ISO 22716, not as OTC drug manufacturers. So before you fall in love with
an “acne-clearing” serum as your hero product, know that you are shopping for a
drug manufacturer, and the shortlist is different.
One word to keep exact through all of this: a cosmetics facility is
FDA registered. Registration became mandatory for cosmetics
under MoCRA, the Modernization of Cosmetics Regulation Act of 2022, and you can
read what it does and does not mean on the FDA’s own
cosmetic facility registration page. It is a filing status.
It is never “FDA approved” — the FDA does not approve cosmetics or the
facilities that make them. A manufacturer who tells you their serum has FDA
approval has described something that does not exist.
| Serum active | Typical status | What the manufacturer needs |
|---|---|---|
| Vitamin C (ascorbic acid, derivatives) | Cosmetic | Cosmetic facility, ISO 22716 |
| Hyaluronic acid | Cosmetic | Cosmetic facility, ISO 22716 |
| Niacinamide | Cosmetic | Cosmetic facility, ISO 22716 |
| Peptides (signal, carrier, etc.) | Cosmetic | Cosmetic facility, ISO 22716 |
| Retinol (cosmetic anti-ageing claims) | Cosmetic | Cosmetic facility, ISO 22716 |
| Salicylic acid with acne treatment claims | OTC drug | OTC drug cGMP (21 CFR Part 211), drug establishment registration, Drug Facts label |
What makes serum manufacturing technically different?
A serum is a high-active, low-viscosity leave-on product, and that combination
is where formulation competence stops being a nice-to-have. Three things bite
harder than they do in a thicker cream:
- Active stability. The ingredients that sell serums are
often the ones that degrade fastest. L-ascorbic acid (vitamin C) oxidises
in water and light, turning yellow then brown and losing activity; retinol
degrades with heat, light and oxygen. A manufacturer’s job is to formulate
and package around that — derivative forms, antioxidant systems, pH
control — and to prove it with stability testing rather than assume
it. Ask what stability programme a formula goes through before it ships. - pH. Many serum actives only work, and only stay safe to
preserve, inside a narrow pH window — low for a vitamin C serum to
keep ascorbic acid effective, higher for others. Getting it wrong quietly
kills either the active or the preservative system. - Packaging. Packaging is part of the formula for a serum,
not an afterthought. Air- and light-sensitive actives need airless pumps,
amber or opaque glass, or single-dose formats; a clear dropper bottle on a
shelf is a design decision that can shorten shelf life. A serum
manufacturer should be advising on primary packaging, not just filling
whatever bottle you hand them.
The practical takeaway: a strong moisturizer or body-wash portfolio does not
prove a factory makes a stable serum. When you shortlist, ask specifically about
serum work — which actives they run, how they handle vitamin C or retinol
stability, and what packaging they recommend for your active. For peptide serums
in particular, formulation gets more involved still; Moe’s Group’s own
peptide
skincare manufacturing page walks through the signal, carrier and
neurotransmitter-affecting peptide families and the stability and delivery-system
questions that come with them — a useful map of what a peptide serum brief
actually involves.
White label, private label or custom — which route for a serum launch?
The routes are the same as for any beauty product; only the examples change.
The ordering is fixed and worth committing to memory, because it is inverted all
over the industry: white label < private label < contract
manufacturing, ascending on cost, on lead time and on how much control
you have over the formula. The client’s own
three-tier definitions are the source of truth for that
ordering.
- White label (stock serum, your label)
- A generic stock serum — a catalogue vitamin C or hyaluronic acid
formula — sold to many retailers with no formula modification and no
exclusivity. Your branding on a serum competitors can sell identically. The
cheapest and fastest route, and the quickest way to test
whether a serum concept sells at all. The manufacturer owns the formula. - Private label (stock serum, made exclusive and lightly customised)
- A stock serum base made exclusive to one brand with some customisation
— fragrance, minor tweaks, packaging — within its validated
stability window. Costs more and takes longer than white label; sits in the
middle. The base formula still belongs to the
manufacturer. - Contract manufacturing (custom serum formula)
- A serum developed to your own specification — your active at your
concentration, your texture — with ownership negotiable
and set in the contract. The most expensive and slowest
route, because the formulation, the stability testing and the packaging
work are all built from scratch. For serums this is where the multi-month
timelines live.
One serum-specific wrinkle sits on top of that ordering: because serum
performance lives in the active and its stability, the private-label “light
customisation” band is narrower than it looks. Swapping a vitamin C form or
nudging the pH to change how a serum feels is a base change, not a surface tweak,
and a base change invalidates the existing stability and preservative-efficacy
data. If your idea needs the active reworked, you are in contract manufacturing
territory whether the quote calls it that or not.
Which manufacturers work for serum specifically?
A comparison that always concludes “use the site’s sponsor” is worth nothing,
so here is the honest version, including where Moe’s Group is the wrong lane. Moe’s
Group is a full-service US contract manufacturer of skincare, hair care and body
care in one FDA-registered facility; for a cosmetic serum — vitamin C,
hyaluronic acid, niacinamide, retinol or peptide, developed to your brief and
scaled in the US, including its copper-peptide and other peptide specialities
— it is a genuine fit. Where it is not the right lane, and who to look at
instead, is below.
Two honesty notes before the table. First, on images: a round-up like this
should show real product photographs, and this site’s rule is that they must be
genuine images from public sources — never stock, never generated. I could
not source hotlink-safe, genuinely-public product photos for these specific
manufacturers today without risking a placeholder, so this is a text comparison
rather than a product-image grid. Second, every entry describes a manufacturing
positioning to confirm at the source on the day you brief it — not
a stated MOQ, price or capability as fact. The competitor detail was compiled from
third-party manufacturer round-ups and each company’s own site (checked 15
September 2026), and those numbers move; verify before you rely on them.
| If your situation is… | Why a full-service cosmetics manufacturer like Moe’s Group may be the wrong lane | Where to look instead (confirm at source) |
|---|---|---|
| An OTC drug serum (salicylic acid with acne claims, benzoyl peroxide) | These are OTC drugs, needing OTC cGMP and a drug establishment registration. Moe’s Group positions as a cosmetics facility under MoCRA and ISO 22716, with no published drug registration — a different capability. | Prime Matter Labs is described in third-party round-ups as handling OTC products including acne formulas — verify its drug registration directly (checked 15 September 2026). |
| A very small first run (tens of units, testing a concept) | A founder who needs a handful of test units may sit below any full-service contract manufacturer’s practical floor. | Catalogue/dropship stock-serum routes such as Selfnamed, or small-batch houses such as Trilogy Laboratories (Florida). Both are described as taking very low minimums — confirm current terms and whether custom formulation is available (checked 15 September 2026). |
| A serum-only specialist (you want a dedicated serum house, not full-service bodycare) | Not a weakness in Moe’s Group, but some founders specifically want a manufacturer whose whole catalogue is serums. | Serum specialists such as SkinCore Labs list vitamin C, retinol, niacinamide, peptide and hyaluronic acid serums — their site states its own certifications and terms, which you should verify independently (checked 15 September 2026). |
| A tinted or colour-correcting serum (BB-serum, shimmer) | A tint pushes the product into colour cosmetics, which is a distinct chemistry not in Moe’s Group’s published portfolio. | A skincare-plus-colour manufacturer — ask any candidate directly whether they run colour cosmetics, as few generalist skincare houses do (checked 15 September 2026). |
| Lowest unit cost at high volume, formula already validated | Once a formula is proven and you are scaling hard, offshore manufacturing can beat a US contract manufacturer on unit cost. That is a legitimate strategic trade-off, not a criticism of either. | Large offshore manufacturers such as those in South Korea and Italy — weigh the unit-cost saving against longer lead times, import logistics and harder oversight (checked 15 September 2026). |
None of the entries above states a manufacturer’s MOQ, price or ownership terms
as fact — those are questions for each supplier and they change. Whichever
route you choose, verify the basics yourself: any manufacturer’s registration can
be checked against the FDA’s
cosmetic facility registration guidance, and any ISO 22716
certificate a factory cites can be looked up at
IAF CertSearch. Moe’s
Group’s own
how-to-choose
guide walks through the same verification checklist.
Frequently asked questions
Can I launch a salicylic acid serum as a cosmetic?
Only if you make no drug claims. Salicylic acid appears in cosmetics as an
exfoliant, but the moment the label carries an acne treatment or clearing claim
it becomes an over-the-counter drug under the FDA acne monograph (21 CFR Part
333).
An OTC drug serum must be made under OTC drug cGMP by a facility with a drug
establishment registration and carry a Drug Facts panel — a different class
of manufacturer from a cosmetics contract manufacturer. Decide which product you
are making before you shortlist factories.
What is the minimum order for a custom serum?
It depends entirely on the manufacturer and the route. White label stock
serums can start very low; a fully custom serum, with its own formulation and
stability programme, carries a higher minimum because the development work has to
be amortised across the run. No single number applies, and any MOQ you are quoted
should be put in writing for your specific format before you rely on it. Treat
MOQ as a conversation with each supplier, not a published fact.
How long does serum development take?
A white label or lightly-customised private label serum can move quickly
because the base formula already exists and is already stability-tested. A custom
serum takes months, not weeks: formulation, then stability testing — often
including accelerated stability to predict shelf life — then production
scheduling. Vitamin C and retinol serums in particular need real stability data
because the active degrades, so do not compress that stage to hit a launch date.
What packaging does a vitamin C serum need?
Air- and light-protective packaging. L-ascorbic acid oxidises on exposure to
air and light, so a clear dropper bottle on a shelf will shorten its usable life.
Airless pumps, amber or opaque glass, or single-dose formats all help, and the
choice interacts with the formula — which is why the manufacturer should be
recommending primary packaging as part of the formulation, not filling whatever
bottle you supply.
Is my manufacturer’s ISO 22716 certificate valid for serums?
Check the scope. ISO 22716 is the Good Manufacturing Practice standard for
cosmetics, and a certificate is issued for a defined scope. A certificate is
strong evidence a factory runs a disciplined cosmetics operation, but read what
it covers and verify it at IAF CertSearch rather than taking a framed copy at face
value. Note too that ISO 22716 is a cosmetics standard — for an OTC drug
serum you additionally need a manufacturer working under OTC drug cGMP.
Trying to work out whether your serum is a cosmetic or an OTC
drug, and which US manufacturer can keep your active stable? Ask a contract
manufacturer directly about its serum work, stability testing, packaging, ISO
22716 scope and minimum order in writing — Moe’s Group takes enquiries
through its
product inquiry form.
Disclosure: Contract Beauty is published with the
support of Moe’s Group, a contract manufacturer named in this article. We name
competing suppliers and say where Moe’s Group is the wrong choice because a
comparison that always concludes the same way is worth nothing. Manufacturing
models, certificate scopes and minimum order quantities change; confirm current
terms with any supplier before you commit. See our
editorial policy.