If you’ve ever scrolled through a clinic’s treatment menu and felt a bit lost at all the different filler names, you’re not alone. Hyaluronic acid, collagen stimulators, biostimulators, it can read like a different language when you’re just trying to work out what’s actually right for your face. So let’s break it down properly.
Why There Isn’t Just One Type of Filler
Different areas of the face need different things. Lips need softness and movement. Cheeks need structure and lift. Under-eye hollows need something incredibly gentle that won’t look lumpy under thin skin. That’s why the aesthetics industry has developed several distinct categories of filler, each suited to a different job rather than one product trying to do everything.
Hyaluronic Acid Fillers
These are by far the most common type you’ll come across, and for good reason. Hyaluronic acid (HA) is a substance your body already produces naturally, which is part of why these fillers tend to feel soft and natural once settled. They’re also reversible, since a practitioner can dissolve them with an enzyme if you’re not happy with the result, which makes them a popular first-time choice.
HA fillers come in different thicknesses depending on where they’re being used:
- Thinner formulas for lips and fine lines, where softness and subtle movement matter most.
- Medium-density formulas for cheeks and mid-face volume.
- Thicker, more structured formulas for jawline definition and deeper contouring.
Collagen-Stimulating Fillers
Rather than adding volume directly, these work by triggering your own body to produce more collagen over time. Results build gradually over several weeks or months rather than appearing instantly, but they also tend to last considerably longer than HA fillers, sometimes well over a year. These are often chosen by people looking to improve overall skin quality and firmness rather than just adding volume in one specific spot.
Calcium Hydroxylapatite Fillers
This type has a thicker, more structural consistency, which makes it particularly good for areas that need real lift and support, like the cheeks or jawline. It also has a mild collagen-stimulating effect alongside its immediate volumising benefit, giving you a bit of both worlds.
Choosing the Right One for You
This is genuinely the part where a proper consultation matters more than anything else. The right filler depends on your facial anatomy, the area you’re treating, how long you want results to last, and whether you’d prefer something reversible while you’re still finding your feet with treatments. A good practitioner won’t just recommend whatever’s popular that month, they’ll actually assess your face and talk you through the different types of fillers available before landing on the one that fits what you’re after.
Things Worth Asking Before You Book
A few questions worth putting to any clinic before you commit:
- Is the filler CE-marked or otherwise approved for use in your country? The Medicines and Healthcare products Regulatory Agency (MHRA) oversees the safety standards that dermal filler products are expected to meet in the UK, so it’s worth checking a clinic’s products against that baseline.
- Is the practitioner appropriately qualified and insured to perform the treatment?
- What’s the expected longevity of this specific product, and is it reversible if needed?
- What aftercare will you need, and are there any activities to avoid in the days following?
In the UK, checking that a practitioner is listed on a recognised register, such as Save Face, is one of the simplest ways to confirm they meet an accredited standard before you book anything.
Frequently Asked Questions
What’s the difference between hyaluronic acid fillers and collagen stimulators? Hyaluronic acid fillers add volume directly and tend to show results immediately, while collagen stimulators work more gradually by encouraging your body to produce its own collagen over several weeks. HA fillers are also reversible, whereas collagen stimulators generally are not.
How long do dermal fillers typically last? This varies significantly by type and by area treated. Hyaluronic acid fillers in the lips might last six to twelve months, while cheek or jawline fillers using thicker formulas can last twelve to eighteen months or longer. Collagen-stimulating treatments often last well beyond a year.
Is it safe to get fillers dissolved if I don’t like the results? Hyaluronic acid fillers can be dissolved using an enzyme called hyaluronidase, which is one of the reasons they’re often recommended for people new to fillers. Other filler types, including collagen stimulators and calcium hydroxylapatite, cannot be dissolved in the same way, so it’s worth discussing reversibility with your practitioner before treatment if that matters to you.
How do I know if a filler clinic is properly regulated? Checking that a clinic uses properly approved products, and that its practitioners are on an accredited register, is a good baseline before booking any treatment.