How Long Does Lip Filler Last?
Reviewed for medical accuracy against our Medical Review Board · Last updated 23 August 2026
Part of Dermal Fillers
Everyone says six to twelve months. The FDA approval trial for a lip filler followed 220 people for over a year and measured them on a validated scale, and it found something more useful: the result peaks at week eight rather than on the day, and at week forty-eight, nearly eleven months, 48.7% still showed a measurable improvement. It also found that 70.9% of participants needed a touch-up appointment, which nobody mentions when you book.
All of this comes from the Summary of Safety and Effectiveness Data for PMA P250016, Belotero Intense plus Lidocaine, the FDA document behind its lip augmentation approval. It covers one hyaluronic acid lip filler and its comparator, not every product on the market, and we say so throughout.
1. The actual duration curve
This is Table 14 of the FDA document. A blinded evaluator scored lip fullness on the MLFAS, a validated five-point photographic scale, and a "responder" is someone with at least a one-point improvement from baseline.
| Weeks after treatment | Belotero Intense | Comparator filler |
|---|---|---|
| Week 4 (1 month) | 84.2% | 67.3% |
| Week 8 (2 months) | 91.1% | 90.4% |
| Week 16 (about 4 months) | 89.6% | 78.4% |
| Week 24 (about 5.5 months) | 78.8% | 72.9% |
| Week 36 (about 8 months) | 69.8% | 63.8% |
| Week 48 (about 11 months) | 48.7% | 47.8% |
Read that as a curve rather than a single number and it answers the question far better than "six to twelve months" does. The result climbs for two months, holds through four, then declines steadily.
2. It peaks at week eight, not on the day
84.2% were responders at week four. 91.1% at week eight. The result got better between month one and month two.
Part of that is swelling resolving so the actual shape becomes visible, and part is that 70.9% of participants had a touch-up, which the week eight measurement follows. Either way the practical conclusion holds: the lips you see two weeks after treatment are not the finished result.
That matters because two weeks is the standard advice for judging filler, and for the midface it is sound. For lips this data suggests waiting longer before deciding you are unhappy, and certainly before asking for more product.
3. Half still had a result at eleven months
At week 48, 48.7% were still responders. Just under half, at nearly eleven months, still measured at least a full point better than baseline on a blinded assessment.
That is a more optimistic figure than the usual six-to-twelve-month framing implies, and it is worth holding alongside the honest reading: half of people were not still responders at that point. Week 24, around five and a half months, is where 78.8% still were, and week 36 at 69.8%. So:
- Around four months, roughly nine in ten still have a measurable result.
- Around eight months, roughly seven in ten.
- Around eleven months, roughly one in two.
Note this is a one-point improvement on a five-point scale, which is a measurable difference rather than a dramatic one. Having "a result" at eleven months is not the same as looking like you did at week eight.
4. Two different products, the same curve
The trial had a comparator arm treated with a different hyaluronic acid lip filler, and the two tracked each other closely: 90.4% against 91.1% at week eight, and 47.8% against 48.7% at week 48.
Two separate products landing within one percentage point of each other at eleven months is reasonable evidence that this curve is a property of hyaluronic acid in lips rather than of one brand. That is the justification for treating these figures as broadly informative rather than brand-specific trivia, and it is also a useful answer to anyone claiming their particular filler lasts dramatically longer in lips.
5. Seven in ten needed a touch-up
Buried in the study accountability section: 117 of 165 participants, 70.9%, received a touch-up treatment. In the comparator arm it was 74.5%.
That is a genuinely useful expectation to set. The trial protocol allowed a top-up before the primary measurement, and most participants had one. It suggests that getting the result you want from lip filler is commonly a two-appointment process rather than one, which is worth knowing before you judge a first treatment as a failure or a clinic as having underdelivered.
Ask at booking whether a touch-up is included in the price or charged separately. Given how often it happens, that is a material question about the real cost.
6. The softer measure, and why to separate it
The same trial also used the GAIS, a global aesthetic improvement scale, and those numbers are much higher: at week eight 100% of participants showed some level of improvement per the investigator, with 92.4% rated much or very much improved. By week 48, 92% still showed some level of improvement per the investigator and 90% by their own assessment.
Both figures are real, and the difference between "92% still improved at week 48" and "48.7% still responders at week 48" is entirely about the bar. GAIS counts any improvement at all; MLFAS requires a full point on a five-point fullness scale.
Which you should believe depends on the question. If it is "will anyone be able to tell", the softer measure is relevant. If it is "will my lips still look done", the 48.7% is the honest number. Clinics quoting the higher figure are not lying, but they are answering a gentler question.
7. Lips settle slower than the midface, but milder
The same document records what participants logged in daily diaries for 28 days. Putting it beside the midface data we covered in filler recovery, from a different FDA document, produces a comparison nobody has drawn:
| Lips (P250016) | Midface (P110033) | |
|---|---|---|
| Any treatment reaction | 88.4% | 98.1% |
| Rated severe | 4.9% | 19.2% |
| Typical resolution | Majority in 15 to 28 days | Median 6 days |
| Swelling of the treated area | 83.5% upper lip | 85.7% |
So lips produce far fewer severe reactions, 4.9% against 19.2%, but take considerably longer to settle: the majority resolving in 15 to 28 days rather than a median of 6 days. Uncomfortable for longer, but less intensely.
That fits what people report and contradicts the common briefing that lip swelling is dramatic but brief. Dramatic-looking, yes. Brief, not particularly.
8. When to judge, and when to rebook
Working from the curve rather than from convention:
- Weeks 1 to 4. Do not judge. Swelling is still resolving, the majority of treatment reactions run 15 to 28 days, and only 84.2% were responders at week four against 91.1% at week eight.
- Week 8. The peak, and the point the trial used as its primary endpoint. This is when to assess the result properly and when a touch-up conversation makes sense.
- Week 16, about four months. Still 89.6%. If your result has gone by now, the likeliest explanation is dose rather than metabolism.
- Weeks 24 to 36, five to eight months. The decline becomes noticeable, from 78.8% to 69.8%. Most people book their next appointment somewhere in here.
- Week 48, about eleven months. Roughly half still measurable. Anyone still happy at this point is in the fortunate half rather than experiencing something unusual.
9. What actually changes your own figure
The trial does not isolate these, so this is reasoning from what it does show plus the mechanics of the product, rather than measured effect sizes:
- How much was placed, and whether you had the touch-up. Given 70.9% of participants needed one, this is likely the biggest single variable.
- Which product. Less than people assume, given two different HA fillers landed within one point of each other at week 48. Gel firmness matters more for how it looks than how long it lasts.
- The area itself. Lips move constantly, which is the usual explanation for their being shorter-lived than cheeks or jawline.
- Your baseline. A one-point improvement is harder to maintain from a fuller starting point than a thinner one.
What is not supported by anything in this document: claims that a particular aftercare routine, supplement or "metabolism" meaningfully extends lip filler. Our page on what actually happens after filler sorts the aftercare advice by whether there is a mechanism behind it.
10. What this data does not cover
Stated plainly, because precision is the point of the page. These figures come from one FDA trial of one hyaluronic acid lip filler, with a second HA filler as comparator. They are the best public lip-specific dataset we have found, and:
- They do not describe Juvederm Volbella or Restylane Kysse specifically. Those hold their own approvals and we have not been able to retrieve equivalent documents for them.
- They do not describe non-HA products, which are not used in lips in any case.
- MLFAS measures fullness, not shape, symmetry or how natural a result looks, which are what most complaints are actually about.
- A trial population under protocol, with touch-ups allowed and blinded assessment, is not identical to a busy clinic.
For choosing where to have it done, our guide to verifying an injector's licence is free and takes two minutes, and the dermal filler guide covers which products can be dissolved, which matters more than duration if a result goes wrong. If what you actually want is a subtly more visible lip edge rather than added volume, a lip flip is a different treatment worth understanding first.
Before you book. Filler complications has the three questions worth asking, and the FDA data on why the injector matters more than the brand.
Frequently asked questions
How long does lip filler last?
When does lip filler look its best?
Do most people need a second appointment for lip filler?
Does one brand of lip filler last longer than another?
Why do some clinics say results last a year and others six months?
How long does lip filler swelling last?
When should I judge my lip filler result?
Is it normal for lip filler to be gone at six months?
Can I make lip filler last longer?
Does this apply to Juvederm or Restylane lip filler?
What does responder actually mean in these numbers?
Where do these numbers come from?
Know the count before the quote. The unit count is half the bill, and a low per-unit rate recovered by a high unit count is the commonest way a deal is not one. How to tell.
Deciding which area, not how many units? Botox by facial area covers what each zone actually achieves, which four are FDA approved, and the things Botox cannot fix at all.
