CoreAge Rx / Smooth Move
TRETINOIN · NIACINAMIDE · VITAMIN C
Real tretinoin, correctly paired with niacinamide — the best-evidenced construction in topical anti-ageing — at $42 a month with the prescriber, the compounding and delivery included. What the page still will not say is how much tretinoin, and it does not carry the pregnancy contraindication. We do, below.
Buy it. The formula, the disclosure and the price all hold up.
ASSESSED ON 75% OF THE MODEL. 2 CRITERIA LEFT UNSCORED — SEE SCORING FOR WHY.
Do not use this if there is any chance you are pregnant. Then ask for the tretinoin concentration in writing — between 0.01% and 0.1% is a tenfold difference in what you are buying.
The verdict
This is the best-constructed product in the register and the reasoning is short. Tretinoin is the best-evidenced topical anti-ageing agent there is — not a close contest — with replicated trial evidence for wrinkle depth, surface roughness and pigmentation simultaneously. It binds nuclear retinoic acid receptors directly, with no conversion step. A prescriber genuinely belongs in front of it, and here one is.
Pairing it with niacinamide is the correct move rather than a decorative one, and it is the part most formulators get wrong. Retinoid outcomes are governed by adherence more than by dose; adherence is governed by tolerability; niacinamide damps the irritation that makes people abandon a retinoid in week three. Night-time application is right for a photolabile drug, the directions say to start slowly and build, and they insist on daily sunscreen — which is the other half of the treatment rather than an afterthought.
At $42 a month the prescriber, the compounding and delivery are included, which for a genuine prescription retinoid is a fair price. The obvious comparison in this register is a competing tretinoin-and-niacinamide cream at $35 a month that publishes three concentrations and a titration ladder. That competitor discloses better; this one is not badly priced for what it is.
Two things should be on the page and are not, and both are one line of copy. The tretinoin concentration — prescription tretinoin runs 0.01% to 0.1%, a tenfold range with different tolerability and different timelines — and the pregnancy contraindication, which is standard, universal and belongs on any page selling this drug. Ask for the first before you subscribe. The second is printed below, and it is not negotiable.
- Contains genuine prescription tretinoin, the best-evidenced topical anti-ageing agent available, by a wide margin.
- Pairing it with niacinamide is the correct construction and the one most likely to keep somebody using it past week three.
- Night-time positioning is right for a photolabile retinoid.
- Directions are specific and correct: thin layer, clean dry skin, start slowly, sunscreen every day.
- The physician gate is legitimate here — this is a real prescription drug and it needs a prescriber.
- $42 a month including the intake, the compounding and delivery is a fair price for a compounded retinoid.
- US-compounded with the medical entities named in the site footer.
- No concentration published for the tretinoin — a tenfold range with entirely different tolerability and timelines.
- No concentration published for the niacinamide or the vitamin C either.
- Vitamin C form unstated, which is what determines whether it conflicts with a tretinoin-stable pH.
- Vitamin C applied at night, when an antioxidant delivers least.
- No pregnancy warning on a page selling a retinoid.
- No side effects listed and no description of retinisation, which is the main reason people quit.
- No INCI, no container size, no clinical data.
- A competitor publishes three concentrations and a titration ladder for $7 a month less.
Every active, assessed
- TretinoinNOT PUBLISHED
Retinoid — binds nuclear RAR, upregulates procollagen, downregulates MMPs
- BENCHMARK
- 0.025%–0.1% in the photoageing trial literature; products exist from 0.01%
- ASSESSMENT
- The right molecule, the strongest evidence base in topical dermatology, and a legitimate reason for the prescription. The one thing to establish before you start is which strength you have been given — a tenfold range separates a starter dose from the strongest in routine use, and it decides how you titrate.
- NiacinamideNOT PUBLISHED
Barrier support, anti-inflammatory, sebum regulation
- BENCHMARK
- 2%–5% is the evidenced range
- ASSESSMENT
- Exactly the right partner for a retinoid — it reduces the irritation that drives people to quit, which matters more for outcomes than any second active would. Worth confirming it is at 2% or above.
- Vitamin CNOT PUBLISHED
Antioxidant, collagen cofactor, brightening
- BENCHMARK
- 8%–20% for L-ascorbic acid at pH ≤3.5; derivatives work at neutral pH
- ASSESSMENT
- The form decides whether this is a sensible inclusion or a redundant one. As a phosphate or glucoside derivative it sits happily alongside a retinoid at neutral pH; as L-ascorbic acid it cannot share a tretinoin-stable vehicle. Either way it is doing least at night, which is when this cream is used.
| ACTIVE | CONC. | BENCHMARK | ASSESSMENT |
|---|---|---|---|
| TretinoinRetinoid — binds nuclear RAR, upregulates procollagen, downregulates MMPs | NOT PUBLISHED | 0.025%–0.1% in the photoageing trial literature; products exist from 0.01% | The right molecule, the strongest evidence base in topical dermatology, and a legitimate reason for the prescription. The one thing to establish before you start is which strength you have been given — a tenfold range separates a starter dose from the strongest in routine use, and it decides how you titrate. |
| NiacinamideBarrier support, anti-inflammatory, sebum regulation | NOT PUBLISHED | 2%–5% is the evidenced range | Exactly the right partner for a retinoid — it reduces the irritation that drives people to quit, which matters more for outcomes than any second active would. Worth confirming it is at 2% or above. |
| Vitamin CAntioxidant, collagen cofactor, brightening | NOT PUBLISHED | 8%–20% for L-ascorbic acid at pH ≤3.5; derivatives work at neutral pH | The form decides whether this is a sensible inclusion or a redundant one. As a phosphate or glucoside derivative it sits happily alongside a retinoid at neutral pH; as L-ascorbic acid it cannot share a tretinoin-stable vehicle. Either way it is doing least at night, which is when this cream is used. |
Scoring
- EVIDENCE FOR THE ACTIVEWEIGHT 30%100/100
This criterion asks how good the evidence for the chosen actives is, and there is no better answer available in topical skincare. Tretinoin has replicated randomised trial evidence for photoageing across decades and remains the reference standard every other anti-ageing ingredient is measured against. Niacinamide has genuine independent support and is the right partner for it. The missing concentration is a real problem, and we score it under disclosure rather than twice.
- FORMULATION INTEGRITYWEIGHT 20%95/100
Tretinoin plus niacinamide, applied at night, with daily sunscreen instructed, is the textbook-correct construction — the pairing addresses the single biggest reason retinoid courses fail. Marked down only for the vitamin C: the form is unstated, which leaves an unresolved pH question against a tretinoin-stable base, and night-time is when an antioxidant delivers least.
- DISCLOSUREWEIGHT 15%68/100
The weakest part of the page and the reason this is not in the high nineties. It contains a genuine prescription drug and does not say how much, across a tenfold range. No pregnancy warning on a retinoid page, no side effects, no description of retinisation, no INCI, no container size. The directions themselves are specific and correct, which is the only reason this is not lower.
- TOLERANCE IN USEWEIGHT 15%NOT ASSESSED
Not assessed — and unusually, not assessable even in principle here, because tolerance to a retinoid is a function of its concentration and the concentration is not published.
- TEXTURE & WEARWEIGHT 10%NOT ASSESSED
Not assessed. Requires the product in hand over the full trial window.
- COST PER APPLICATIONWEIGHT 10%90/100
$42 a month for a genuine compounded prescription retinoid, with the intake, the physician review, the compounding and delivery included, is a fair price — cheaper than most dermatology visits alone. Held back because no container size is published, so cost per application cannot be computed, and because a directly comparable product costs $7 a month less and publishes three concentrations.
What it is
Smooth Move is a compounded night-time cream sold by CoreAge Rx at $42 a month, marketed for fine lines, wrinkles, uneven texture and dullness. It names three actives — tretinoin, niacinamide and vitamin C — and publishes a concentration for none of them.
The prescription is real, and the pairing is right
On this company's cosmetic products we have described the physician review as a dispensing service rather than a regulatory requirement. That does not apply here. Tretinoin is a prescription drug and a prescriber belongs in front of it.
It is also the right drug. Tretinoin binds nuclear retinoic acid receptors directly — no conversion step, unlike retinol — upregulates procollagen and downregulates the enzymes that break collagen down. It is the only topical with replicated trial evidence for wrinkle depth, surface roughness and pigmentation simultaneously.
Putting niacinamide alongside it is the correct decision and not a decorative one. Retinoid outcomes are governed by adherence more than by dose, adherence is governed by tolerability, and niacinamide reduces the irritation that causes people to give up in week three. That is the single most useful thing a compounder can do to a retinoid, and this formula does it.
The number that should be on the page
Prescription tretinoin does not come in one strength. It runs from 0.01% at the bottom of what compounders dispense to 0.1% at the top of routine use. That is a tenfold range, and the difference is not academic — it determines how much peeling you get, how long retinisation lasts, whether you can use it nightly, and how long before anything is visible.
The photoageing trial literature starts at 0.025%. Which of these you have been prescribed is a question for the intake, and the answer should come in writing.
We have built this chart before, for another company, and found products at 0.01%, 0.015%, 0.025%, 0.05%, 0.07% and 0.1% across a single catalogue. The range is real and it is used. A personalised prescription is a legitimate reason not to print one figure on the page; it is not a reason to withhold the range, or to leave a buyer without their own number once it has been decided.
The vitamin C question
Tretinoin creams are formulated and stabilised around pH 5.2 to 5.5. L-ascorbic acid requires pH 3.5 or below both to remain stable and to penetrate skin at all. Those two requirements cannot be satisfied by the same vehicle.
That is not the end of the argument, though. Vitamin C derivatives — sodium ascorbyl phosphate, magnesium ascorbyl phosphate, ascorbyl glucoside — are stable at neutral pH and sit perfectly happily alongside a retinoid. If that is what is in this cream, there is no conflict at all, and a compounder who paired tretinoin with niacinamide this deliberately has probably chosen one.
Either this is L-ascorbic acid, in which case the pH one ingredient needs compromises the other — or it is a derivative, in which case the formulation is sound. One word on the ingredient list resolves it, and it is worth asking for, because it is the only open question about how this cream is built.
There is a separate point that holds whichever form it is. This cream is for night-time use, correctly, because tretinoin is photolabile. But vitamin C's headline benefit is antioxidant protection against free radicals generated by daytime UV exposure. Applying it at night is when it does least. It is not harmful — it is just the wrong shift.
The pregnancy contraindication belongs on this page
The page lists no side effects. It gives usage notes — thin layer, start slowly, avoid eyes and broken skin, wear sunscreen — and nothing about who should not use this at all.
Tretinoin is contraindicated in pregnancy. Every prescriber says so, every product label says so, and it is the first thing anybody dispensing a retinoid establishes. Systemic absorption from topical tretinoin is low and the teratogenic evidence for topical use is far weaker than for oral isotretinoin — we are not claiming otherwise. But the contraindication is standard, it is universal, and a page selling the drug should carry it. Since this one does not: do not use this product if you are pregnant, trying to conceive, or breastfeeding.
This is the second product from this company where the gap is the contraindication rather than the pharmacology. Time Out sells a topical oestrogen with no mention of breast cancer. This sells a retinoid with no mention of pregnancy. In both cases the intake questionnaire may well ask — but the page a buyer decides on does not tell them.
The absence of any side-effect information is its own gap, and it costs the company customers rather than protecting them. Retinisation — flaking, tightness, transient redness for the first few weeks — is close to universal, resolves, and is the single most common reason people abandon a retinoid. Warning about it is not a deterrent. It is the thing that keeps someone using the product long enough for it to work.
What $42 a month buys, against the alternative
The most useful comparison for this product is one already in our register, because it is the same idea executed differently.
The competitor discloses better and costs seven dollars a month less: three published tretinoin concentrations, a named tier for each type of user, and a stepped route from the gentlest to the strongest, which is the correct clinical way to introduce a retinoid. If disclosure is what you are buying on, buy that one.
What lifts this product above it on our scoring is the construction. Tretinoin with niacinamide addresses the failure mode that actually ends retinoid courses, and it is the one thing the competitor's formula does not do. Get the concentration in writing at the intake and you have both halves — the better formula and the number you need to titrate with.
If you are considering it
- Ask for the tretinoin concentration in writing before you subscribe. This is the question.
- Ask which form the vitamin C is, and what the pH of the base is.
- Ask the niacinamide concentration — under 2% it is not doing the job it was included for.
- Ask the container size so you can work out the real monthly cost.
- Use it two or three nights a week for the first month, then build. Nightly from day one is how people fail retinoids.
- Wear broad-spectrum SPF every day without exception. This is the other half of the treatment.
- Expect to look worse before better. Retinisation peaks around week three and resolves.
- Judge it at week twelve, not at thirty days.
- Do not use it if there is any chance you are pregnant.
Where we stand
This is the highest score in the register, and it comes down to construction. Tretinoin is the best-evidenced topical anti-ageing agent available. Niacinamide alongside it is the correct pairing rather than a decorative one, because it addresses the reason most retinoid courses end. The night-time positioning is right, the directions are the ones we would give, the prescriber requirement is genuine, and $42 a month with the compounding and delivery included is a fair price for it.
It is a 91 rather than higher because of what the page withholds rather than what the tube contains. The tretinoin concentration is not published across a tenfold range, the vitamin C form is not named, and a retinoid page carries no pregnancy contraindication and no description of retinisation.
Publish the three concentrations, name the vitamin C form, state the pregnancy contraindication and describe the adjustment period. Four additions, none of them a reformulation, and there would be nothing left to hold against this product.
Who this is for
- Someone starting or continuing a retinoid who wants prescriber oversight, compounding and delivery handled in one subscription.
- Someone who has asked for and received the tretinoin concentration in writing, and been told which form the vitamin C is.
- Someone who will give it twelve to twenty-four weeks and wear sunscreen daily.
- You are pregnant, trying to conceive, or breastfeeding. Tretinoin is contraindicated and the page does not tell you so.
- You are already using another retinoid. Do not stack them.
- You want to know exactly what strength you are on before you buy — nothing here is quantified until you ask.
- You have active eczema, rosacea or a compromised barrier. Settle that before starting a retinoid.
- You will not use daily sunscreen. Without it a retinoid course works against itself.
Do not use this if there is any chance you are pregnant. Then ask for the tretinoin concentration in writing — between 0.01% and 0.1% is a tenfold difference in what you are buying.
This is an editorial assessment of published information about a prescription product. It is not a diagnosis, not a prescription and not a substitute for your own prescriber. Hydroquinone and tretinoin are drugs. Decisions about them belong with a clinician who has seen your skin.
Sources
- S-01CoreAge Rx — Smooth Move product page Price, the three named actives without concentrations, prescription requirement, directions, and the absence of side effects, warnings, INCI, size or clinical data.
- S-02Stability of hydrophilic gels of tretinoin Tretinoin formulation stability and the pH range at which it is maintained.
- S-03Mixing high-performance actives: do's and don'ts in skincare formulation The pH incompatibility between L-ascorbic acid and retinoid-stable vehicles, and the neutral-pH derivatives that avoid it.
- S-0430+/SKIN — Musely The Anti-Aging Cream review The comparison used above: the same tretinoin-plus-niacinamide concept at $35/month with three published concentrations and a titration ladder.