What Is Letybo? The New FDA-Approved Wrinkle Relaxer, Explained

Letybo (letibotulinumtoxinA) is an FDA-approved prescription neuromodulator that temporarily smooths moderate to severe frown lines between the brows. The FDA approved it in the United States in 2024, and it has been used in more than 31 million procedures worldwide. It is the leading neuromodulator in South Korea, where it has topped the market for years. Most patients see their results develop within 3 to 6 days.

If you follow aesthetic treatments at all, you have probably noticed a new name showing up next to Botox: Letybo. It is one of the newest wrinkle relaxers available to U.S. patients, and it arrives with a long track record overseas. This guide explains what Letybo is, how it works, what it is actually approved to treat, and what to expect if you are considering it as your first neuromodulator or as a switch from the one you use now.

What is Letybo?

Letybo is a botulinum toxin type A, the same family of injectable neuromodulators that includes Botox, Dysport, Xeomin, and Jeuveau. Its active ingredient is letibotulinumtoxinA, and it is made by Hugel, a South Korean company that has produced this formulation for the international market since 2010. In February 2024, the FDA approved Letybo for use in the United States.

The “neuromodulator” label matters. Letybo does not fill or plump anything, the way a dermal filler does. Instead, it temporarily relaxes the specific muscles responsible for certain expression lines. When those muscles are at rest, the skin above them looks smoother. As the product wears off over the following months, muscle movement gradually returns and the lines reappear, which is why treatments are repeated periodically.

What gives Letybo its credibility is volume of use. With more than 31 million procedures performed worldwide and a position as the top-selling neuromodulator in South Korea for several consecutive years, it is not an experimental newcomer. It is a widely studied product that is simply new to the U.S. market.

How does Letybo work?

Letybo works by blocking the chemical signal that tells a muscle to contract. When your injector places a small, measured dose into a target muscle, the product binds to the nerve endings there and temporarily interrupts the release of acetylcholine, the messenger that triggers contraction. The muscle relaxes, and the skin over it stops creasing with each frown or squint.

Two technical features are worth understanding because they shape how injectors use the product. Letybo shows strong binding at the SV2 receptor, the docking site the toxin uses to enter nerve endings, and it has a relatively contained effective diffusion radius. In plain terms, that combination is meant to help the product stay closer to where it is placed. For an experienced injector, predictable placement is the goal, because expression is personal and the aim is a softer version of your own face, not a frozen one.

It is important to be honest about what this does and does not mean. A contained diffusion profile is a characteristic of the product, not a guarantee of a better result for every person. Outcomes depend heavily on the injector’s skill, the dose, your anatomy, and how your body responds. Results vary from patient to patient.

What is Letybo approved to treat?

Letybo is FDA-approved for one specific use: the temporary improvement in the appearance of moderate to severe glabellar lines in adults. Glabellar lines are the vertical “frown lines” or “11s” that form between the eyebrows when you furrow your brow, and they are driven by the corrugator and procerus muscles in that area.

That precision is not a technicality. It means that other common requests, such as forehead lines and crow’s feet around the eyes, fall outside Letybo’s current FDA-approved indication. Some providers do use neuromodulators in additional areas based on clinical judgment, but those uses are not part of what the FDA reviewed and approved for Letybo. A responsible provider will tell you clearly which areas a product is approved for and discuss your options honestly rather than implying an approval that does not exist.

How fast does Letybo work, and how long does it last?

Most patients begin to notice smoother frown lines within 3 to 6 days of treatment, and results typically last about 3 to 4 months, consistent with the product’s FDA-approved labeling. As with any neuromodulator, the exact onset and duration vary based on your dose, your muscle strength, your metabolism, and how many times you have been treated.

This timeline is similar to other modern neuromodulators, which is helpful if you are switching from another product and want to know what to expect. Because the effect is temporary, maintaining your results means returning for treatment a few times a year. Many patients plan their appointments around the natural fade so their frown lines never fully return to baseline. If you want a deeper look at how long these results hold and what affects them, our guide on how long Botox lasts and what affects the timeline applies to this product family as well.

What makes Letybo different from other wrinkle relaxers?

On a practical level, Letybo behaves much like the neuromodulators you already know. It relaxes targeted muscles, takes a few days to set in, and lasts a few months. The differences are in the details, and they tend to matter more to injectors than to the surface experience of treatment.

Letybo is a highly purified type A formulation, and its binding and diffusion characteristics are designed to support precise placement. For patients, the most relevant point is choice. Having another well-established option means your injector can match a product to your goals and your history, rather than treating every face with the same default. If you want a broader view of how the major products stack up, see our Botox vs wrinkle relaxers treatment guide, which covers Dysport, Xeomin, and Jeuveau alongside Botox.

For a direct, side-by-side look at how this product compares with the category leader, read our breakdown of Letybo vs Botox.

Who is a good candidate for Letybo?

Letybo may be a good fit for healthy adults who want to soften moderate to severe frown lines and who are looking for a neuromodulator option. It can be a reasonable choice for someone trying a wrinkle relaxer for the first time, and it can also appeal to patients who want to try a different product than the one they have used before.

One group that often asks about new options is patients who feel their usual neuromodulator no longer works as well as it once did. There are several possible reasons for that experience, and a thorough provider will explore them with you rather than assuming a single cause. Trying a different product is sometimes part of that conversation, but it is a clinical decision that should be made with your injector, not a guarantee.

Letybo is not appropriate for everyone. People who are pregnant or breastfeeding, who have certain neuromuscular conditions, or who have had a reaction to a botulinum toxin product in the past may not be candidates. The right way to find out is a consultation with a qualified injector who reviews your health history. Our guide on how to find a qualified medspa injector you can trust is a useful starting point.

Is Letybo safe? Side effects to know

Letybo has a safety profile in line with other FDA-approved botulinum toxin type A products, supported by its extensive use worldwide. Like all neuromodulators, it can cause side effects. The most common ones are mild and temporary, such as redness, swelling, or bruising at the injection site, headache, and occasionally a temporary heaviness or droop in the treated area if the product affects a nearby muscle.

More serious effects are rare, but botulinum toxin products carry an FDA boxed warning noting that the effects can, in rare cases, spread beyond the injection site. That is one of several reasons treatment should be performed by a licensed, medically trained provider who knows facial anatomy and proper dosing. During your consultation, your provider should review the full list of risks, your medical history, and any medications you take. We never promise a specific outcome, and we encourage realistic expectations: the goal is a natural, refreshed look, and results vary from person to person.

What to expect at your Letybo appointment

A Letybo appointment is quick and similar to other neuromodulator treatments. After a consultation to confirm you are a candidate and to map your frown lines, your injector cleanses the area and places a series of small injections into the targeted muscles between your brows. The injections themselves take only a few minutes, and most patients describe the sensation as a quick pinch.

There is little to no downtime. You can usually return to your day right away, with a few simple aftercare steps such as avoiding heavy exercise, facial massage, and lying flat for several hours. You will start to see your frown lines soften over the next several days, with the fuller effect by about two weeks. Because the principles overlap, our Botox aftercare guide is a helpful reference for the first few days after any neuromodulator.

Letybo at Esthetica Med Spa

We are introducing Letybo at Esthetica Med Spa, starting at our Tampa location, as part of our injectable menu. Every treatment is performed by our medically trained nurse injectors, who will help you decide whether Letybo, another neuromodulator, or a different approach best matches your goals. We are a women-led practice, and our consultations are genuine assessments, not sales pitches.

If you are curious whether Letybo is right for you, the best next step is a conversation with one of our injectors. You can book a complimentary consultation or explore our injectables and wrinkle relaxer options to learn more before you book.

Frequently asked questions

Is Letybo the same as Botox?

No, but they are closely related. Both are botulinum toxin type A neuromodulators that temporarily relax the muscles that create expression lines. They are made by different companies and have their own formulations, but they work on the same principle and are used in similar ways. The main practical differences are in onset, formulation details, and which areas each product is FDA-approved to treat.

How much does Letybo cost?

Pricing depends on the number of units you need and the area being treated, which is why a consultation is the only way to get an accurate quote. As a newer option, Letybo is sometimes priced competitively against established products, but the right comparison is value over time, not just price per visit. Your injector can walk you through the expected number of units for your frown lines.

Can I switch to Letybo from Botox or Dysport?

Many patients do consider switching products, and it is generally something you can discuss and plan with your injector. There is no required waiting period beyond letting your current treatment follow its normal course. Your provider will review your history and goals to decide whether and how to make the change.

Does Letybo work for forehead lines and crow’s feet?

Letybo is FDA-approved specifically for moderate to severe frown lines between the brows, not for forehead lines or crow’s feet. Treatment in other areas is outside its approved indication. Talk with your provider about your full set of goals so they can recommend an approach that is both effective and appropriate.

How long do Letybo results last?

Most patients see results last about 3 to 4 months, consistent with the FDA-approved labeling. Onset is typically within 3 to 6 days. Individual timing varies based on dose, muscle strength, and how your body responds, and results are temporary, so maintenance treatments are needed to keep frown lines softened.

Considering Letybo? Start with a conversation

Letybo brings a globally established neuromodulator to the U.S. market, with a clear, FDA-approved purpose: softening the frown lines between your brows. Whether it is the right choice for you depends on your goals, your history, and a careful assessment by a trained injector. There is no single best wrinkle relaxer, only the one that fits your face and your plan. Book your complimentary consultation or find your nearest Esthetica clinic to talk through your options without pressure.