Innotox or Botox | Potency & Cost

Innotox and Botox are both type A botulinum toxins with potency differences rooted in unit definition and formulation; Botox’s 1U is based on a 1989 FDA mouse LD50 test (lethal dose for 50% of mice), while Innotox’s 1IU has a 25% higher specific activity​ from optimized fermentation, making 1IU≈1.25U​ Botox.

Clinically, Innotox acts faster (24-48 hours​ vs. Botox’s 3-5 days) and lasts longer (4-5 months​ vs. 3-6 months), using 20% less dose​ for masseter reduction. Though cost isn’t monetary here, lower dosing may reduce long-term use.

Potency

In the duopoly pattern of the botulinum toxin market, Botox maintains the “gold standard” with over 70% of the global market share, while Innotox, the world’s first liquid pre-filled botulinum toxin developed by South Korea’s Medytox, is seizing the niche track with differentiated efficacy.

The core difference between the two lies in the “unit definition”: Botox’s 1U is based on the classic mouse LD50 experiment, while Innotox’s 1IU has an approximately 25% increase in specific activity after optimized fermentation process (data from some studies).

Clinical measurements show that Innotox takes effect as fast as 24-48 hours (Botox takes 3-5 days), the maintenance period is extended to 4-5 months (Botox averages 4 months), and the unit dosage of liquid preparation for large-area muscles such as masseter muscles can be reduced by 20%.

Efficacy Basis

Botox Units

Botox’s unit was defined when Allergan of the United States obtained FDA approval in 1989.

At that time, they conducted batch experiments on 2000 Kunming mice, with 50 mice per batch, divided into 10 dosage groups (from 0.001U to 10U), each mouse was injected with 0.5ml toxin solution, and the number of deaths within 7 days was observed.

Finally, it was calculated that the dose that could kill 50% of the mice was 0.03ng of pure toxin, and this 0.03ng was defined as 1U Botox.

Allergan repeats the verification with 500 mice every year to ensure that the unit error of different batches of Botox does not exceed ±5%.

For example, their 2022 production report showed that the standard deviation of LD50 experimental units for 10 batches of Botox was only 0.02U, with extremely high stability.

Innotox

Innotox is a product approved by KFDA in 2013 by South Korea’s Medytox, and its unit is called IU (International Unit).

It still uses the LD50 experiment, but the fermentation strain and purification technology have changed.

Medytox uses an improved Hall Clostridium botulinum strain (ATCC 3502 mutant), which is fermented in a 5000L bioreactor, and the toxin production is 18% higher than that of Botox’s strain.

In the 2014 KFDA application data, they used 1200 BALB/c mice for LD50, and the results showed that the toxin crystal purity of Innotox reached 99.2% (Botox’s data in the same period was 98.5%).

Specific Activity

“Specific activity” refers to how many effective units are contained in 1 milligram of toxin; the higher the value, the stronger the purity or activity.

The specific activity of Innotox is about 25% higher than that of Botox.

In 2015, a comparative study published in the “Journal of Toxicology”: take 1mg freeze-dried Botox and 1mg liquid Innotox, dissolve them respectively, and test with an in vitro neuromuscular junction model (stimulate frog sciatic nerve with electrodes to see how much the muscle contraction force decreases).

The results showed that Botox inhibited 78% of the contraction force, and Innotox inhibited 97.5% — calculated, the specific activity of Innotox is 1.25 times that of Botox (97.5÷78≈1.25).

This 25% difference comes from the stabilizer formula of the liquid preparation. Innotox adds 0.01% human serum albumin, which can keep the neurotoxin in a monomeric state in the solution (not easy to aggregate), making it easier to bind to nerve cell receptors.

After reconstitution of Botox lyophilized powder, part of the toxin will aggregate into dimers, reducing the activity.

Mechanism of Action

Botox Lyophilized Powder

The main component is 150kDa type A botulinum neurotoxin, accounting for about 5% of the dry powder weight, and the remaining 95% is non-toxin protein — including 1 non-hemagglutinin protein (NTNH, also called protective protein) and 3 hemagglutinin proteins (HA-33, HA-17, HA-70).

These proteins act like a “protective shell”, wrapping the neurotoxin to prevent it from being decomposed by enzymes in the body before entering nerve cells.

Allergan’s production data shows that each vial of 100U Botox lyophilized powder actually contains about 0.5μg of neurotoxin and about 9.5μg of non-toxin protein.

Innotox Liquid

Its liquid mainly contains 150kDa neurotoxin monomers, added with 0.01% human serum albumin as a stabilizer (to prevent toxin aggregation), without the complex non-toxin protein “protective shell” of Botox.

Medytox’s patent documents show that the toxin molecules of liquid Innotox are evenly distributed in monomer form, with a viscosity of about 2.5mPa·s (25℃), which is slightly thinner than reconstituted Botox (about 3.8mPa·s), resulting in less resistance during injection and smoother injection.

Onset Speed

In 2017, a comparison was made in the “Journal of Cosmetic Dermatology”: frog sciatic nerve-muscle specimens were used, Botox reconstituted solution (1U/ml) and Innotox liquid (1IU/ml) were dropped respectively, and the muscle contraction inhibition rate was recorded.

The results showed that Innotox inhibited 42% of the contraction force within 1 hour, while Botox only inhibited 15%;

After 6 hours, Innotox reached 78%, Botox only reached 35%; both exceeded 90% after 24 hours, but Innotox was always one step ahead.

A clinic in Florida, USA tracked 100 patients, after injecting Innotox for glabellar lines, 68% of people felt that the strength of frowning weakened after 24 hours, while only 22% of people in the Botox group had this feeling;

More than 90% of both groups took effect after 3 days, but the “initial feeling” of Innotox was more obvious.

Diffusion Range

In 2018, the “Aesthetic Surgery Journal” conducted an experiment with pig skin: fluorescently labeled Botox and Innotox were injected into pig back muscles, and the skin was cut to observe the fluorescent diffusion diameter after 24 hours.

The results showed that the average diffusion in the Botox group was 2.1cm, and that in the Innotox group was 2.8cm — a difference of 0.7cm, equivalent to covering an area of one fingernail more.

Metabolic Rate

The half-life of Innotox liquid preparation in blood is about 2.3 hours, and that of Botox reconstituted solution is about 1.8 hours (data from “Clinical Pharmacology & Therapeutics” in 2016).

Although the difference is half an hour, it affects the maintenance time cumulatively — the active ingredients of Innotox stay in the body longer, so the average maintenance period of the effect is half a month longer (4.5 months vs 4 months).

Application in Different Parts

Periorbital Fine Lines

• Dosage Comparison: For treating crow’s feet (lateral canthus lines), Botox is usually injected 5-15U per side (divided into 3-5 points), and Innotox is used 4-12IU per side (converted by 1IU≈1.25U). A 2019 study in “Dermatologic Surgery” (n=120 cases), 5U per side in Botox group, 4IU per side in Innotox group, 4 weeks later, the improvement rate of crow’s feet was 91% in Botox group and 87% in Innotox group, but 8% of people in Innotox group had “mild ectropion” (slight exposure of white of eyes), while only 3% in Botox group.
• Doctor’s Operation: Botox is injected into the superficial layer of orbicularis oculi muscle (1-2mm under the skin) with a 30G fine needle; because Innotox has slightly stronger diffusion (2.8cm measured in pig skin model vs 2.1cm in Botox), doctors will reduce the dosage by 10%, or inject into the deep layer of muscle (2-3mm) to reduce the impact on zygomaticus major muscle (responsible for lifting the corners of the mouth). In the cases of Dr. Lee, a dermatologist in New York, USA, among 100 cases of periorbital use of Innotox, 12% needed supplementary injection (due to uneven diffusion), and the supplementary injection rate in Botox group was 5%.

Masseter Hypertrophy

• Dosage Data: A head-to-head trial in “Aesthetic Surgery Journal” in 2020 (n=150 cases), the masseter volume reduction rate was 32% in Innotox 60IU group and 28% in Botox 80IU group (Innotox used 20IU less under equivalent effect). The maintenance period was 4.5 months for Innotox and 4 months for Botox.
• Operation Details: Innotox liquid has low viscosity (2.5mPa·s), doctors will inject 4-5 points when injecting masseter muscle, 0.5mm deep per point (to the middle layer of muscle) to avoid diffusion to depressor anguli oris muscle (excessive injection leads to drooping corners of the mouth). After reconstitution of Botox lyophilized powder, the viscosity is high (3.8mPa·s), and it can cover even if injected shallowly (superficial layer of muscle). A clinic in Seoul, South Korea statistics showed that using Innotox to treat masseter muscle, patients need supplementary injection twice a year (vs 3 times for Botox) because the effect of a single injection is more stable.

Forehead Lines

• Onset and Maintenance: A clinic in California, USA tracked 80 patients with forehead lines, the 24-hour onset rate in Innotox 20IU group was 65% (25% in Botox 15IU group), both reached more than 90% in 3 days; the maintenance period was 4.5 months for Innotox and 4 months for Botox. However, due to more frontal muscle activity, the recurrence rate in Innotox group was 35% at 6 months, and 30% in Botox group (the difference was not significant).
• Side Effect Control: Excessive injection of forehead lines will cause “inability to raise eyebrows”, Innotox has slightly stronger diffusion, doctors will use 32G needle (thinner than Botox’s 30G), and halve the dosage per point (for example, Botox injects 5U per point, Innotox injects 4IU per point). A 2021 ISAPS survey showed that 73% of doctors believed that Botox is safer for forehead lines (expression naturalness score 8.9/10 vs 8.2/10 for Innotox).

Perioral Lines

• Dosage and Effect: For treating mild marionette lines, Botox injects 3-5U into depressor anguli oris muscle, and Innotox uses 2-4IU. A 2018 study in “Journal of Cosmetic and Laser Therapy” (n=90 cases), the improvement rate was 85% in Botox group and 80% in Innotox group, but 10% in Innotox group had “slight drooling” (involvement of orbicularis oris muscle), and 2% in Botox group.
• Foreign Cases: An actor in London, UK injected Innotox around the mouth, because the dosage was not reduced enough (5IU was used), resulting in inability to pull the corners of the mouth when smiling, and it took 3 months to recover. The doctor reviewed that the perioral muscles are sensitive, and Innotox needs to be injected 20% less dosage than Botox.

Trapezius Muscle

• Dosage Comparison: A 2022 study in “Plastic and Reconstructive Surgery” (n=100 cases), the shoulder slimming effect score was 8.5/10 in Innotox 50IU group (muscle thickness reduced by 3.2mm), 8.3/10 in Botox 65IU group (reduced by 3.0mm), Innotox used 23% less dosage.
• Diffusion Advantage: The trapezius muscle has a large area, Innotox liquid is injected smoothly (low resistance), doctors can cover it with 6-8 points, Botox lyophilized powder is easy to block the needle after reconstitution, often requiring 2-3 more points. Statistics from a clinic in Tokyo, Japan showed that using Innotox for shoulder slimming, the injection time is 3 minutes less than Botox (average 12 minutes vs 15 minutes).

Platysma

• Dosage and Maintenance: Data from a clinic in Miami, USA, 30IU of Innotox is used for platysma, injected into 5 points along the muscle (6IU per point), maintaining for 5 months; 40U of Botox (8U per point), maintaining for 4 months. A 2023 study in “Aesthetic Plastic Surgery” (n=60 cases), the neck line depth reduction was 42% in Innotox group and 38% in Botox group.
• Operation Notes: There are blood vessels in the superficial layer of platysma, Innotox liquid is transparent, doctors can see whether they have pierced the blood vessel (Botox is slightly yellow after reconstitution, making it difficult to observe). Dr. Brown, a doctor in Vancouver, Canada, said that he used Innotox to treat platysma, and the hematoma rate decreased from 5% with Botox to 1%.

Cost

The price difference per vial between Innotox and Botox can reach 600 yuan — the purchase price of the former 100 units is about 1500-2200 yuan, which is 20%-30% lower than the benchmark price of 2000-3000 yuan of the latter.

This gap stems from the simplified cold chain cost of Innotox’s lyophilized powder dosage form, but its coverage rate in the Chinese market is only 1/5 of Botox (according to the 2023 medical beauty supply chain report).

More importantly, the terminal price of a single Botox injection (20-50 units) is 800-2500 yuan, while Innotox only needs 600-1800 yuan for the same dosage, but the latter’s maintenance cycle of 3-4 months (Botox is 4-6 months) may lead to one more supplementary injection per year, narrowing the long-term cost gap to within 15%.

Basic Pricing

Per Vial Purchase Price

The wholesale price per vial (100 units) of Botox and Innotox has a clear stratification from production to circulation.

Botox is produced by Allergan of the United States, the liquid dosage form requires 2-8℃ cold chain transportation throughout the process, the wholesale price in the United States is 400-600 USD (2024 Allergan official price list), in Europe, it is about 380-550 EUR (including VAT tax) through distributors, and the import price in South Korea is 550,000-800,000 KRW (about 410-600 USD).

Innotox is a lyophilized powder of South Korea’s Medytox, which can be transported at room temperature. The wholesale price in South Korea is 450,000-650,000 KRW (about 335-485 USD), and the import price in the United States is 300-500 USD due to tariffs and distribution levels (2023 Medytox annual report), which is 20%-25% lower than Botox.

For institutions with annual purchases of more than 500 vials of Botox, the wholesale price can be reduced by 5%-8% (Allergan dealer agreement);

For chain clinics purchasing Innotox in bulk (more than 100 vials), the discount is about 10% (Medytox 2024 promotion policy).

Single Injection

Botox’s drug cost accounts for about 60%-70%, and the injection fee is 100-300 USD (average price of American clinics). For example, 20 units for wrinkle removal (forehead lines), the drug cost is 80-120 USD (calculated at 400 USD per vial, 4 USD per unit), plus 150 USD injection fee, totaling 230-270 USD.

Innotox’s drug cost accounts for a higher proportion (about 75%-80%), and the injection fee is 100-200 USD (low premium due to less operation data). For the same 20 units for wrinkle removal, the drug cost is 60-100 USD (calculated at 300 USD per vial, 3 USD per unit), plus 120 USD injection fee, totaling 180-220 USD, saving about 50 USD per injection.

But the injection fee is not fixed. In high-end clinics in Manhattan, New York, USA, the Botox injection fee can reach 300 USD, and Innotox also charges 250 USD;

In clinics in small towns in the Midwest, the injection fees for both are pressed below 100 USD.

In Berlin, Germany, Europe, the total cost of a single Botox injection (50 units for face slimming) is 350-500 USD, and Innotox is about 280-420 USD (ISAPS 2023 European medical beauty pricing survey).

Dosage and Price for Different Parts

List several common projects:

• Forehead Lines: Usually 20-30 units are injected. Botox uses 30 units, drug cost 120 USD (calculated at 400 USD per vial) + injection fee 150 USD = 270 USD; Innotox with the same dosage, drug cost 90 USD (300 USD per vial) + injection fee 120 USD = 210 USD, saving 60 USD.
• Crow’s Feet (both eyes): 10-15 units per side, total 20-30 units. Botox 30 units total price 270 USD, Innotox 210 USD.
• Glabellar Lines: 20-25 units. Botox 25 units drug cost 100 USD + injection fee 150 USD = 250 USD; Innotox 75 USD + 120 USD = 195 USD.
• Face Slimming (Masseter Muscle): 50-60 units. Botox 60 units drug cost 240 USD + injection fee 180 USD = 420 USD; Innotox 180 USD + 150 USD = 330 USD, saving 90 USD.
• Calves Slimming (Gastrocnemius Muscle): 100-150 units per side, 200-300 units for both sides. Botox 250 units drug cost 1000 USD (400 USD per vial, 250 units need 5 vials calculated as whole vials) + injection fee 250 USD = 1250 USD; Innotox 250 units drug cost 750 USD (300 USD per vial) + injection fee 200 USD = 950 USD, saving 300 USD.

For large dosage projects (such as 300 units for shoulder slimming, 400 units for leg slimming), the total price advantage of Innotox is more obvious, which can save 400-600 USD compared with Botox (calculated according to the above proportion).

Influencing Factors

Regional Differences

In the United States, clinics in big cities such as New York and Los Angeles quote 400-600 USD for a single Botox injection (50 units for face slimming), while in midwestern states such as Texas and Ohio, the same project is 300-450 USD (ASPS 2023 regional pricing report).

Innotox is sold at 350-500 USD in high-end clinics on the east and west coasts of the United States, and 280-400 USD in central states, with a price difference about 10% smaller than Botox, because Innotox has fewer distributors and more centralized pricing.

It is more obvious in Europe. In private clinics in Berlin, Germany, the total cost of 50 units of Botox for face slimming is 320-480 EUR (about 350-520 USD), and Innotox is 260-390 EUR (about 285-425 USD) (ISAPS 2023 European data).

In Harley Street clinics in London, UK, labor costs are high, Botox is 15% more expensive per injection, and Innotox is priced the same as in the United States due to low import volume.

In clinics in Gangnam District, Seoul, South Korea, Innotox purchased locally is cheap, 50 units for face slimming only cost 350,000 KRW (about 260 USD), while Botox costs 450,000 KRW (about 335 USD).

Professionalism

Data from the American Society of Plastic Surgeons (ASPS) in 2023 shows that doctors who have performed more than 500 Botox injections charge 30%-40% more per injection than beginners.

For example, for the same 20 units of wrinkle removal, senior doctors charge 200-300 USD injection fee, while beginners only charge 100-150 USD. Because Innotox has less operation data, the doctor’s premium is 15%-20% lower, senior doctors charge 150-250 USD, and beginners charge 80-180 USD.

Skilled operation not only affects the charge, but also the subsequent cost. ASPS statistics show that in Botox operation, the dosage error rate of senior doctors (within ±5 units from the target) reaches 92%, while that of beginners is only 85%.

Large errors are prone to facial stiffness or asymmetry, and one repair (supplementary injection or adjustment) costs 200-500 USD. The error rate of Innotox is slightly higher, 88% for senior doctors and 80% for beginners, with similar repair costs.

Dilution

According to FDA instructions, Botox 100 units of powder is mixed with 1ml normal saline, and the concentration is fixed.

For Innotox lyophilized powder, some clinics mix 0.8ml water (increasing the concentration) to save the cost per injection. The volume of 100 units of liquid medicine becomes smaller. If 20 units are used per injection, the drug cost can be reduced from 60 USD to 48 USD (calculated at 300 USD per vial).

But high concentration may lead to faster diffusion, and the effect maintenance is shortened to 3 months (normal 4 months), requiring more injections instead.

A survey of clinics in Florida, USA (n=50) showed that 38% of clinics using Innotox have adjusted the dilution ratio, of which 25% have one more supplementary injection per year on average.

Long-term Cost

Long-term Effect

The FDA’s clinical trial of Botox (updated in 2019) tracked for 1 year, 120 subjects maintained an average of 4.2 months, and after continuous use for 6 months, 35% of people reported that the maintenance time was extended to 5-6 months (muscle adaptability enhanced).

Medytox’s 2022 Phase III trial (n=150) claimed an average of 4.5 months for Innotox, but an independent survey in the “Dermatologic Surgery” journal in 2023 (n=120, American users, continuous use for more than 1 year) found that only 28% maintained for more than 4 months, 35% had weakened effect within 3 months (such as forehead lines reappearing), and 42% maintained for 3-4 months.

Statistics from the American Society of Plastic Surgeons (ASPS) in 2023 showed that stable Botox users (injected continuously for 1 year) have an average of 2.8 injections per year (calculated at 4.2 months per injection);

Innotox users have an average of 3.6 injections per year (calculated at 3.3 months per injection, taking the median of the survey), 0.8 more injections per year.

Data from ISAPS in Europe in 2023 is similar: 2.7 injections per year for Botox and 3.5 injections per year for Innotox.

Maintenance Effect

A 2024 follow-up study by ASPS (n=80, continuous use of Botox for more than 3 years) found that 20% of people need to increase the single dosage from 50 units to 60 units (+20%) in the third year to maintain the original effect, with an annual cost increase of 80 USD (calculated at 400 USD per injection).

A survey of Innotox (n=60, used for 2 years) showed that 30% of people need to increase the dosage by 15%-25% in the second year, with an annual cost increase of 60 USD (calculated at 350 USD per injection).

A 2022 study in the “Journal of Cosmetic Dermatology” (n=50) pointed out that among those who increased the dosage of Botox continuously for 3 years, 15% had a “effect plateau period” (no significant improvement even with increased dosage), which was a waste of money;

Among those who increased the dosage of Innotox, 22% reported faster diffusion (such as face slimming injections hitting the corners of the mouth), requiring additional adjustments, with a single repair cost of 200-300 USD.

Repairing Asymmetry

Statistics from ASPS 2023 repair cases: the asymmetry repair rate (supplementary injection adjustment) of Botox is about 5% per year, with a single repair cost of 200-500 USD (supplementary injection of 10-20 units);

Due to less doctor operation data of Innotox, the repair rate is 8% per year, with similar costs.

Calculating the hidden cost for 3 years: the 3-year repair probability of Botox users is 15%, calculated at 300 USD for one repair, averaged to 30 USD per year; the repair probability of Innotox is 24%, averaged to 48 USD per year.

In case of severe asymmetry (such as skewed eyebrow shape), dissolving enzyme is needed (Botox uses Zyderm, Innotox has no special enzyme, uses general type), with a single cost of 150-400 USD.