The core difference: a number, or a buffer
The Ordinary publishes 0.5% retinol, sells 0.2% and 1% versions of the same thing, and puts all three in squalane with almost nothing else in the bottle. La Roche-Posay publishes no retinol figure at all and fills the formula with supporting ingredients whose job is to make the retinoid liveable.
Both are coherent product philosophies. One sells you a dose and expects you to manage it. The other sells you an outcome and manages the dose on your behalf, without telling you what it is.
Why the unpublished number is a real cost, not a technicality
US labeling rules require ingredients above 1% to be listed in descending order of predominance, and allow anything at 1% or below to be listed in any order. Every retinol in every cosmetic sits in that second group. So La Roche-Posay is not hiding the figure through some loophole — there is simply no requirement to publish it, and almost nobody does.
The practical consequence is that you cannot step up deliberately. The published escalation approach for retinoids is to start low, establish tolerance, then increase — and you cannot increase from a number you do not have. With The Ordinary the ladder is printed on the box: 0.2%, then 0.5%, then 1%. Our guide to stepping up is genuinely usable with one of these and largely theoretical with the other.
Why the bare base is a real cost too
Squalane is an emollient and a good one, but a retinol in squalane and nothing else has no humectant drawing water in and no occlusive holding it there. On dry or mid-adjustment skin that is a product you have to build a routine around rather than drop into one. The Ordinary’s formula is also anhydrous, which helps the retinol’s stability and does nothing for your comfort.
La Roche-Posay’s serum has niacinamide and hyaluronic acid doing two different jobs — barrier-directed support and water-binding — in a base with noticeably more slip. If the last retinol you tried left your cheeks flaking by week two, this is the formula that addresses that directly, and the one The Ordinary asks you to solve with a separate moisturizer.
Where they are the same
- Both are fragrance-free per their listings, which matters more than most of the differences above if your skin is reactive.
- Both are 30 ml. Neither is sized for the neck and chest, and neither will stretch if you try.
- Both are night products. Retinoids are light-sensitive and raise sun sensitivity; neither brand suggests otherwise.
- Neither has been tested by us, and neither brand publishes a controlled trial on the finished product. The evidence for retinoids as a class is strong; the evidence for either of these specific bottles is a formulation argument.
The price gap, honestly
The gap is large enough to change the decision rather than just the receipt. At the prices showing on this page, the La Roche-Posay costs several times what The Ordinary does for the same 30 ml, and you can buy The Ordinary’s 0.2%, 0.5% and1% — the entire ladder — for less than one bottle of the pharmacy serum.
That is the single strongest argument in this comparison, and it is an argument about experimentation rather than value. Retinol is a product you will get wrong at least once. Getting it wrong cheaply, with a printed number telling you what you got wrong, is a better first year than getting it wrong expensively with no number to adjust.
The counter-argument is adherence, and it is not weak. If the cushioned base is the difference between using a retinoid four nights a week for a year and quitting in March, the expensive bottle is the better purchase, because consistency beats formulation and beats price.
Which one for which problem
Fine lines and general photoaging
Either. This is the job retinoids as a class are best evidenced for, and both products are retinol. Pick on base and budget, not on positioning. Our page on retinol for wrinkles sets out what to expect and when.
Dry, flaky or sensitized skin
La Roche-Posay, or The Ordinary’s Granactive Retinoid if you would rather change the molecule than the base. The sensitive skin roundup ranks this properly, on irritation risk rather than strength.
Acne and post-acne marks
Neither, as a first choice. La Roche-Posay’s retinol serum is not sold as an acne product, and The Ordinary’s is a general retinol. An over-the-counter adapalene is a stronger tool for active breakouts, and our retinol vs adapalene comparisonexplains why. For the marks left behind, CeraVe’s resurfacing serum is the cheaper, better-aimed product — see The Ordinary vs CeraVe.
A first-ever retinol
The Ordinary 0.2%. It is the cheapest honest way to find out how your skin responds, and it is the bottom rung of a ladder you can actually climb. The beginner roundup has the full set.
The verdict
Buy The Ordinary unless you have a specific reason not to, and treat the printed percentage as the feature you are paying for — or rather, not paying for. Buy the La Roche-Posay if dryness or past irritation is the thing standing between you and a retinoid habit, and accept the unpublished number as the price of a formula that handles tolerance for you.
What you should not do is buy the La Roche-Posay because it costs more and assume that means it is stronger. The strength is unpublished on one side and printed on the other, and on the only evidence either brand supplies, the cheap one is the one you can be sure contains 0.5% retinol.
