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Botox or hyaluronic acid: the difference and how to choose

Dr Svitlana Lazenko Published on 10 February 2026 6 min read

If you are thinking about an aesthetic medicine treatment, you have very likely heard two names: botulinum toxin, popularly known as botox, and hyaluronic acid. They are by far the most sought-after treatments. They are also the ones that cause the most confusion, because many people believe they do the same thing. They do not.

Understanding the difference is the first step towards an informed decision and realistic expectations. Let us break it down.

What botulinum toxin does

Botulinum toxin acts on the muscles. More specifically, it relaxes in a controlled way the muscles responsible for expression lines, the ones that appear when we frown, raise our eyebrows or squint when we smile.

The result is a softening of these lines and a more rested look. It is important to stress that, when well applied, the toxin does not remove expression from the face. The goal is to soften, not to freeze.

This treatment is especially suited to dynamic wrinkles, those associated with movement. It is usually applied to the forehead, between the eyebrows and at the outer corners of the eyes.

What hyaluronic acid does

Hyaluronic acid is a substance that naturally exists in our body and has a huge capacity to retain water. In aesthetic medicine it is used mainly as a filler.

Unlike the toxin, which relaxes muscles, hyaluronic acid restores volume and structure. That is why it is used to add volume or definition to the lips, to fill folds, to harmonise contours or to hydrate the skin deeply, in the case of skinboosters.

In other words: if the problem is a movement wrinkle, the answer is usually the toxin. If the problem is a lack of volume or structure, the answer is usually hyaluronic acid.

A simple way to tell them apart

A practical way to understand the difference is this:

  • Botulinum toxin treats what moves. It acts on muscles and expression lines.
  • Hyaluronic acid treats what has lost volume or definition. It acts by filling and structuring.

Often, the face benefits from a combination of the two, precisely because they treat different problems. They are not competing treatments, they are complementary.

So which one should I choose?

The honest answer is: it depends on what bothers you. And that is a decision that should not be made from an article, however complete, nor from what worked for a friend.

Every face is different. The same wrinkle can have different causes in different people, and the right treatment for one may not be right for another. That is why the medical assessment is so important. At a consultation it is possible to understand the origin of what bothers you and define the most suitable plan, safely.

What to look for when deciding

Whatever the treatment, there are three things always worth ensuring:

  1. That it is performed by a doctor. These treatments, though minimally invasive, are medical acts and require knowledge of anatomy.
  2. That certified products are used. The quality and traceability of the product are a matter of safety.
  3. That there is a prior assessment. Without an assessment, there is no way to know whether the treatment is right for you.

In summary

Botulinum toxin and hyaluronic acid are not the same thing, nor do they serve the same purpose. The toxin softens expression lines by relaxing muscles. Hyaluronic acid restores volume, definition and hydration. Often, the best result comes from combining the two, always in a personalised way.

If you are unsure which is right for you, the safest step is to book an assessment consultation. That is where an honest conversation and a thorough assessment make all the difference.

Everything you need to know

In many cases, yes. Botulinum toxin and hyaluronic acid work in different, complementary ways. The decision to combine them should always come from a personalised medical assessment.

It depends on the area and product. In general, botulinum toxin lasts three to six months, while hyaluronic acid can last from six months to more than a year.

Aestmedic

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