Benzoyl Peroxide Gel IP 2.5%
Benzoyl Peroxide Gel IP 2.5%
Product Description
Product overview
A dermatologist-recommended, water-based gel with 2.5% benzoyl peroxide — the lowest and gentlest effective concentration for treating mild to moderate acne. Formulated with Galderma's Acrylates Copolymer (AC) Technology that releases glycerin to keep skin hydrated while fighting breakouts.
Kills Acne-Causing Bacteria
Benzoyl peroxide destroys C. acnes bacteria within 48 hours by generating free radicals that damage bacterial cell walls — with zero risk of antibiotic resistance.
Texture & feel
SENSORYKills Acne-Causing Bacteria
Benzoyl peroxide destroys C. acnes bacteria within 48 hours by generating free radicals that damage bacterial cell walls — with zero risk of antibiotic resistance.
AC Technology Hydration
Galderma's unique Acrylates Copolymer Technology releases glycerin as the gel absorbs, helping to reduce dryness and irritation common with benzoyl peroxide treatments.
Lowest Effective Concentration
Clinical studies confirm 2.5% BP is equally effective as 5% and 10% for killing bacteria — but with significantly less irritation, dryness, and peeling.
Keratolytic & Anti-Inflammatory
Beyond antibacterial action, BP exfoliates dead skin cells from pore walls and reduces redness and inflammation associated with active acne lesions.
Safety & compatibility
SAFEFDA Category C. Minimal systemic absorption (only ~5%) makes topical BP at 2.5% generally considered acceptable during pregnancy per AAD guidelines, but consult your doctor first.
Considered low risk to nursing infants due to minimal absorption. Avoid applying to chest area where baby may have direct skin contact.
Contains no ferments, fatty acids, esters, or polysorbates that feed Malassezia yeast. Studies show BP has microbicidal activity against Malassezia species.
Oil-free, water-based gel formula with a comedogenic rating of 0. Will not clog pores or worsen breakouts.
Benzoyl peroxide increases photosensitivity. Always use SPF 30+ sunscreen during the day while using this product.
BP can bleach fabrics, towels, bedsheets, and hair on contact. Use white pillowcases and wash hands thoroughly after application.
Ingredient breakdown
INGREDIENTSBenzoyl Peroxide 2.5%Gold Standard
The most effective topical antibacterial ingredient for acne treatment. Kills C. acnes bacteria by generating free radicals that destroy bacterial cell walls. Also provides keratolytic (exfoliating) and anti-inflammatory benefits.
- Efficacy: 2.5% is clinically proven to be as effective as 5% and 10% with fewer side effects (Sagransky et al., 2009)
- Mechanism: Rapidly degrades to benzoic acid, generating free radicals that damage bacterial membranes
- Resistance: Unlike topical antibiotics, bacteria cannot develop resistance to benzoyl peroxide
- AAD 2024: Recommended as first-line treatment for acne by the American Academy of Dermatology
Glycerol (Glycerin)Hydrating
A powerful humectant and skin-identical ingredient that draws moisture into the skin. Released by Galderma's AC Technology as the gel absorbs, helping to offset the drying effects of benzoyl peroxide.
- Function: Humectant that attracts and retains water in the skin's outer layers
- Benefit: Helps maintain skin barrier function and reduces irritation from active treatment
Acrylates CopolymerAC Technology
Galderma's patented delivery system that slowly releases glycerin as the benzoyl peroxide is absorbed, providing sustained hydration to counteract dryness and irritation.
- Function: Film-forming polymer that controls the release of glycerin onto the skin surface
- Benefit: Reduces the typical drying side effects associated with benzoyl peroxide treatment
Carbomer 940Gel Former
A high-molecular-weight polymer of acrylic acid that creates the smooth, non-tacky gel texture. Neutralized with sodium hydroxide to form a clear, elegant gel that spreads easily on skin.
- Function: Thickening and gelling agent that creates a smooth, spreadable consistency
- Safety: Inert ingredient with no skin penetration due to large molecular size
12 ingredients
Benzoyl Peroxide (2.5% w/w), Docusate Sodium, Disodium Edetate, Poloxamer 182, Carbomer 940, Propylene Glycol, Acrylates Copolymer, Glycerol, Silicon Dioxide, Purified Water, Citric Acid, Sodium Hydroxide.
Where it fits in your routine
ROUTINEApply to clean, dry skin as a spot treatment or thin layer on affected areas. Use at night to start; add morning application only after skin has adjusted. Always follow with non-comedogenic moisturizer and SPF during the day.
How to use
HOW TO USECleanse & Dry
Wash the affected area with a mild, fragrance-free cleanser and gently pat skin completely dry with a clean towel.
Apply Thin Film (Days 1–3)
Apply a thin layer of Benzac AC 2.5% gel to affected areas once daily. Leave on for 2 hours, then wash off with water and pat dry.
Leave Overnight (Days 4–7)
If no discomfort occurred, apply in the evening and leave on overnight. Wash off in the morning.
Increase Frequency (Week 2+)
After 7 days with no redness or peeling, you may apply twice daily (morning and night) if your skin tolerates it and improvement is needed.
Moisturize & Protect
Always follow with a lightweight, non-comedogenic moisturizer. In the morning, apply SPF 30+ sunscreen as benzoyl peroxide increases sun sensitivity.
Who is it for?
WHOPerfect for you if:
- You have mild to moderate inflammatory acne (papules, pustules)
- You're new to benzoyl peroxide and want the gentlest effective dose
- You have oily or combination skin prone to breakouts
- Your acne hasn't responded to salicylic acid alone
- You want an OTC treatment recommended by dermatologists
- You need a fungal-acne-safe acne treatment
Consider alternatives if:
- You have very dry or extremely sensitive skin that reacts to most actives
- You have a known allergy to benzoyl peroxide
- You primarily have blackheads/whiteheads (retinoids may work better)
- You have severe cystic or nodular acne (prescription treatment may be needed)
- You cannot commit to daily sunscreen use
Skin type compatibility
SKIN TYPESIdeal match. BP reduces sebum production and kills bacteria thriving in oily environments. Oil-free gel formula absorbs cleanly without adding shine.
Great for spot-treating breakout-prone zones (T-zone) without over-drying other areas. Use targeted application on oily areas only.
Works well for occasional breakouts. The 2.5% concentration is gentle enough for normal skin. Follow with moisturizer to maintain balance.
May cause additional dryness and flaking. Use as a spot treatment only and pair with a rich, non-comedogenic moisturizer. Consider short-contact therapy (wash off after 5–10 minutes).
The 2.5% is the best BP option for sensitive skin, but still expect initial tingling and redness. Start with short-contact therapy and build tolerance slowly. Patch test first.
This is exactly what BP was designed for. Non-comedogenic, oil-free, and fungal-acne safe. The gold standard OTC treatment for inflammatory acne.
Results timeline
MONTH 2–3Initial Adjustment Period
Mild tingling, slight redness, and skin tension are normal. These are signs the product is working. Some users experience mild peeling as dead skin cells are shed.
85% experience initial irritationPurging Phase
Existing clogged pores may come to a head as BP accelerates cell turnover. Breakouts may temporarily worsen before improving. Dryness and peeling typically peak then subside.
60% notice initial purgingVisible Clearing Begins
Active pimples begin to shrink noticeably. New breakouts become less frequent. Skin starts adjusting to the treatment with reduced irritation. Redness around existing lesions fades.
70% see improvement by week 4Significant Improvement
Substantial reduction in inflammatory acne lesions. Skin texture becomes smoother and more even. Post-inflammatory marks begin to fade. Full therapeutic benefit is usually achieved by 8–12 weeks.
85% report clear or much-improved skinRatings by platform
828+ REVIEWSPros & cons
BALANCEDPraised
- Highly effective against inflammatory acne — clinically proven gold standard
- 2.5% concentration offers same efficacy as higher strengths with less irritation
- No bacterial resistance develops, unlike topical antibiotics
- AC Technology releases glycerin to offset drying effects
- Fragrance-free, oil-free, and non-comedogenic formula
- Affordable pharmacy-grade treatment by Galderma
- Can be used as spot treatment or full-face application
- Also shows microbicidal activity against Malassezia yeast
Criticized
- Causes dryness, peeling, and irritation during the first 1–2 weeks
- Bleaches fabrics, towels, hair, and bedsheets on contact
- Increases sun sensitivity — daily sunscreen is mandatory
- Small tube size (20g–30g) may not last long with daily use
- Not effective against blackheads/whiteheads alone (non-inflammatory acne)
- Propylene glycol may cause irritation in very sensitive individuals
- Initial purging period can be discouraging for new users
Budget-friendly alternatives (dupes)
DUPES
Same 2.5% BP concentration in a much larger 8oz tube. Simpler formula without Galderma's AC Technology glycerin release system. More product for less money but may feel slightly more drying.
Same active concentration with added bisabolol for soothing. Slightly more elegant cosmetic formula. Well-suited for sensitive skin users who want a gentler BP experience.
Uses micronized benzoyl peroxide particles for deeper pore penetration. Specifically formulated to be fungal-acne safe. Minimal, clean ingredient list. Higher price but designed for Malassezia-prone skin.
Comparison with competitors
SIDE-BY-SIDEBenzac AC Gel 2.5%
PanOxyl Creamy Wash 4%
Storage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place at 10°C–25°C. Keep away from direct sunlight. Do not freeze.
Plastic squeeze tube with screw-top cap. Opaque packaging protects the formula from light degradation.
Yes — both 20g and 30g sizes are well under the 100ml carry-on liquid limit.
Frequently asked questions
FAQBenzoyl peroxide is FDA Category C. However, because only about 5% is absorbed through the skin and it is rapidly excreted by the kidneys, topical BP at 2.5% is widely considered acceptable during pregnancy by the American Academy of Dermatology (AAD). For breastfeeding, it is considered low risk — just avoid applying it to the chest area where your baby may have direct skin contact. Always consult your healthcare provider before using any acne treatment during pregnancy or breastfeeding.
Yes. Benzac AC 2.5% is fungal acne safe. The formula contains no ferments, fatty acids, esters, or polysorbates that feed Malassezia yeast. Additionally, in vitro studies have shown that benzoyl peroxide has potent microbicidal activity against Malassezia restricta and Malassezia globosa species — the yeasts responsible for fungal acne. While BP alone may not replace dedicated antifungal treatments, it won't worsen fungal acne and may actually help.
Use with caution. Combining benzoyl peroxide with retinol (tretinoin, adapalene), AHAs (glycolic acid), or BHAs (salicylic acid) can increase irritation, dryness, and peeling significantly. If combining, alternate them on different nights or apply BP in the morning and retinol at night. Benzoyl peroxide can also oxidize and inactivate pure vitamin C (L-ascorbic acid), so avoid layering them simultaneously — use them at different times of day. Always introduce new combinations gradually.
Benzac AC 2.5% is best suited for oily, combination, and acne-prone skin types. The oil-free, water-based gel absorbs quickly and helps reduce excess sebum. It can be used on normal skin for occasional breakouts. For dry or sensitive skin, it can still work, but start with short-contact therapy (apply for 5–10 minutes then wash off) and always follow with a rich moisturizer. The 2.5% concentration is the most gentle effective option for all skin types.
Most users begin to see improvement within 2–4 weeks of consistent use. However, full results typically take 8–12 weeks. Your acne may temporarily worsen during the first 1–2 weeks (purging period) as existing clogged pores come to the surface. This is normal and does not mean the product isn't working. Perseverance is key — if no improvement after 4 weeks, consult a dermatologist who may recommend stepping up to Benzac 5% or adding complementary treatments.
Apply Benzac AC 2.5% after cleansing and toning, on clean, dry skin. It goes before moisturizer and sunscreen. For spot treatment, dab directly on blemishes. For full-face use, apply a thin layer to affected areas. Wait 1–2 minutes for the gel to absorb before applying moisturizer. In the morning, always follow with SPF 30+ sunscreen. You can use it once daily (evening) to start, progressing to twice daily if tolerated.
No. Benzac AC 2.5% has a comedogenic rating of 0 out of 5. The oil-free, water-based gel formula contains no comedogenic ingredients. In fact, benzoyl peroxide actively works to unclog pores through its keratolytic (exfoliating) action, removing dead skin cells and excess sebum from within the pore walls. It is specifically designed for acne-prone skin and will not contribute to new breakouts.
Benzac AC 2.5% has a shelf life of approximately 12 months after opening when stored properly at 10°C–25°C in a cool, dry place away from direct sunlight. Always check the expiry date printed on the tube. Recent research has raised concerns about benzene formation in benzoyl peroxide products stored at high temperatures, so proper cool storage is especially important. Do not use if the product changes color, smell, or texture.
Verdict: Benzac AC 2.5% Benzoyl Peroxide Gel is a proven, dermatologist-recommended acne treatment that delivers the gold standard of antibacterial efficacy at the lowest effective concentration. Galderma's AC Technology sets it apart from generic BP gels by releasing glycerin to reduce irritation. At 2.5%, it offers the same bacteria-killing power as higher strengths while being significantly gentler on the skin — making it the ideal starting point for anyone new to benzoyl peroxide. The minimal, fragrance-free, fungal-acne-safe formula is a reliable choice for oily and acne-prone skin. The main trade-offs are the small tube size and the unavoidable adjustment period of dryness and peeling. A cornerstone product in any science-backed anti-acne routine.
Product Overview
What are Quick Product Notes?
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Pro Tip Alert!
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Paraben-Free
Paraben-Free
Understanding Parabens
Parabens are a large group of preservatives which are used to prevent bacteria growing in cosmetic formulations. There has been some healthy controversy surrounding them due to a few studies finding paraben presence in breast tumours and breast tissue. However, the majority of the scientific community have deemed these findings non-conclusive due to the limitations of these studies. There's still a lot of support for avoiding parabens following the better safe than sorry route. If you do we completely support you! If you are concerned about the health safety of parabens, then feel free to avoid them by looking out for the Paraben-Free icon. If not, don't worry about it - they do have had one of the longest safety records as preservatives!
Which Ingredients are classified as Paraben?
A product will be paraben-free if it does not contain any of the following parabens:
- Sodium Isobutylparaben
- Sodium Ethylparaben
- Sodium Butylparaben
- Propylparaben
- Isopropylparaben
- Isobutylparaben
- Sodium Propylparaben
- Butylparaben
- Ethylparaben
- Sodium Methylparaben
- Methylparaben
Sulfate-Free
Sulfate-Free
Understanding Sulfates
Sulfates are a large group of ingredients which act as cleansing agents in Cosmetics. They help loosen up the dirt and grime from your skin and hair to allow for water to wash it away with ease. However some sulfates are so good at their job, they can wash off your skin’s own natural oils that keep it moisturised and protected which can lead to dryness and irritation. Most people will find no issues with sulfate, however if you find your skin doesn't like sulfates then free feel to avoid them by looking out for the sulfate-free icon on Skincarisma.
Which ingredients are classified as sulfates?
We've taken the Sulfates which are considered more harsh for our Sulfate-Free status. A product will be Sulfate-Free if it does not contain any of the following Sulfates:
- TEA-Dodecylbenzenesulfonate
- Ammonium Laureth Sulfate
- Sodium Lauryl Sulfate
- PEG-15 Cocamine
- Sodium Laureth Sulfate
- Sodium Cocoyl Sarcosinate
- Sodium C14-16 Olefin Sulfonate
- Dioctyl Sodium Sulfosuccinate
- Ammonium Xylenesulfonate
- Ammonium Lauryl Sulfate
- Sodium Xylenesulfonate
- Sodium Myreth Sulfate
- Sodium Lauryl Sulfoacetate
Alcohol-Free
Alcohol-Free
Understanding Simple Alcohols
Alcohol ingredients are widely used in cosmetics and come in different types. For the most part alcohols are not problematic at all. However one type of alcohols, simple alcohols can be quite drying to the skin because it evaporates very quickly. This can cause irritation which can also lead to other skin complications. These alcohols should never be used alone on your skin, but combined with other cosmetic ingredients, they are normally without issue. However, for some people with sensitive and easily irritable skin, avoiding products with these simple alcohols may be beneficial. If you find your skin doesn't like these simple alcohols, then free feel to avoid them by looking out for the Alcohol-Free icon.
Which Ingredients are classified as Alcohol?
A product will be alcohol-free if it does not contain any of the following alcohol ingredients:
- SD Alcohol
- Alcohol Denat
- Isopropyl Alcohol
- Alcohol
Silicone-Free
Silicone-Free
Understanding Silicones
If you've ever used a skincare, makeup or beauty product that's made your skin look and feel smoother tempoarily - it's likely contained Silicone. They are a popular class of ingredients found in cosmetics due to their smooth, soft, easy-to-spread and smooth properties that help creates an artificial layer/barrier on top of skin or hair (commonly found in conditioners).
For the same reasons they are popularly used, they are also commonly avoided. Anecdotally, many individuals have reported that Silicones cause/excerbate breakouts, irritation, cause a feeling of skin being unable to breathe, cause clumping of cosmetic products and find it difficult to wash off. As a result, those who find them problematic are avoiding them and increasingly, cosmetic companies are avoiding them as well.
If you have had bad experiences with Silicones in the past, or suspect they are problematic then look out for the tick on the Silicone-free label.
Disclaimer
The Silicone-free label only includes the most common Silicone ingredients that have indentified been reported by individuals that could potentially cause issues.
These include: Amodimethicone, Behenoxy Dimethicone, Bis-Aminopropyl Dimethicone, Cetearyl Methicone, Cetyl Dimethicone, Cyclomethicone, Cyclopentasiloxane, Dimethicone, Dimethicone Copolyol, Dimethiconol, Methicone, Phenyl Trimethicone, Phenyl Trimethicone, Stearoxy Dimethicone, Stearyl Dimethicone, Trimethylsilylamodimethicone.
Note, that this does not include all ingredients part of the Silicone class of ingredients.
EU Allergen-Free
EU Allergen-Free
Understanding the Identified Contact Allergens
The EU's Scientific Committee on Consumer Safety (SCCS) has identified and established 26 cosmetic ingredients that are likely contact allergens (potential to cause skin allergies) as demonstrated in clinical or epidemiological studies. The EU's SCCS have recommend cosmetic companies to disclose them on the labels if used and in cases where the concentration exceeds 0.001% in leave-on products and 0.01% in rinse-off products, then they must be labelled.
Look out for the tick on the EU-Allergen free label to know your cosmetic is free from any of the 26 identified cosmetic ingredients.
For more information regarding the EU's Scientific Committee on Consumer Safety, please visit their official website.
Disclaimer
The EU Allergen Free label is for the 26 ingredients identified by the EU SCCS and products will be only flagged if a suspected ingredient is on it's ingredient list. It is possible for cosmetics to contain one of the suspect ingredients without it appearing on the ingredient list due to it not reaching the concentration threshold to disclose it and cosmetic manufacturers choice to not disclose it.
Also note, the EU Allergen Free label is not personalized for your own allergies you may have and it does not constitute as medical advice. For your specific case, always consult your medical professiona such as dermatologist, physician, pharmacist, or health care provider - please read our medical disclaimer for more information.
Fungal Acne (Molassezia) Safe
Fungal Acne (Molassezia) Safe
Understanding Fungal Acne (Pityrosporum Folliculitis/Malassezia Folliculitis)
Pityrosporum Folliculitis/Malassezia folliculitis or simply known as Fungal Acne is a persistent acne-like condition that commonly responds poorly to traditional acne-treating methods. Unlike most cases of Acne where bacteria is the culprit, Fungi is the culprit of Fungal Acne (Hence the name!). There are certain classes & groups of ingredients that have been shown to promote and feed the growth of the Fungal Acne, Fungi such as fatty acids, oils, esters, polysorbates and fermented ingredients.
For more information regarding Fungal Acne, please visit Simple Skincare Science (f.c) - #3 of our Recommend Skincare Resources for an amazing comprehensive guide!
Please Read: How to use the Fungal Acne (Malassezia) Label
At SkinCarisma, we've done our best to identify as many ingredients as possible but note the fungal-free label may not be 100% accurate due to the complexconditions and combination of ingredients that malezzeria can thrive on.
Additionally, products that may contain ingredients that have shown to feed Malassezia may not neccessarily exacerbate the condition due to concentration of ingredient used in the product, this information is simply not available on the products.
As a result, please note this is only an experimental label that can be best used to possible identify problematic products you have used in the past. It is in no way a perfect identifier nor a predictor in whether or not it will exacerbate or cause fungal acne. It will continue to be worked on as more information and research comes to light.
If you find any ingredients you believe should be included, please email us at snails@skincarisma.com.
Disclaimer
Due to the lack of substantial research into this area it is very likely there are other ingredients and class/groups of ingredients that could feed Fungal Acne which have not been indentified.
The Fungal-Safe label does not constitute as medical advice. For your specific case, always consult your medical professiona such as dermatologist, physician, pharmacist, or health care provider - please read our medical disclaimer for more information.
What are Notable Effects & Ingredients?
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Pro Tip Alert!
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Brightening from 1 ingredient(s):
Promotes Wound Healing from 1 ingredient(s):
Ache-fighting from 1 ingredient(s):
What are Ingredients Related to Skin Type?
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
Pro Tip Alert!
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Dry Skin
Oily/Acne-Prone Skin
Sensitive Skin
What is the Ingredient Safety Breakdown?
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
Pro Tip Alert!
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 3 |
Benzoyl Peroxide
Antiacne Agent, Oxidising Agent
|
Ache-fighting
|
|
| 2 |
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
|
Brightening
Promotes Wound Healing
Hydrating
|
|
| 0 |
Acrylates Copolymer
|
|