Skin Library
A - B - C
A
Acne is a complex skin condition influenced by a combination of hormones, bacteria, genetics, lifestyle, diet and overall skin function. At its core, it develops when excess oil (sebum) and dead skin cells become trapped within the pore, creating a blockage. This environment allows C.acnes bacteria to thrive, which then triggers inflammation, leading to breakouts such as blackheads, whiteheads, papules, pustules or deeper cystic lesions.
Because acne has multiple contributing factors, it often requires more than a one size-fits all approach. This is where working with our experienced Dermal Therapists becomes so valuable.
Through professional skin assessment and consultation, our Dermal Therapists can identify not just what type of acne is present, but also what may be driving it, whether that’s congestion, barrier dysfunction, inflammation or lifestyle related triggers. From there, they can create a tailored treatment plan designed to support the skin both in clinic and at home.
Treatments may focus on deeply cleansing and decongesting the pores, calming inflammation, supporting the skin barrier and gradually improving overall skin health and resilience. Combined with targeted skincare guidance, this helps to regulate oil flow, reduce breakouts over time and improve skin clarity and texture.
In short, acne management isn’t just about treating spots as they appear, it’s about understanding the skin as a whole and working with it long-term to restore balance and confidence.
Acne mechanica is a type of acne like skin condition triggered when the skin is exposed to repeated pressure, friction and heat. This combination can disrupt the skin barrier and lead to inflammation.
As the skin becomes irritated, it may feel rough, and small acne like bumps can start to appear. Acne mechanica can develop anywhere on the body, but it’s been seen more frequently on the face in recent years, partly due to prolonged face mask use. The good news, it can be treated.
Alpha hydroxy acids (AHAs) are a group of chemical exfoliants that include lactic, glycolic, malic and citric acid. Think of them as gentle surface smoothers for your skin. They’re water soluble, so they work only on the outer layer rather than going deep down.
AHAs help loosen the “glue” that holds dead skin cells together, allowing them to shed more easily and reveal fresher, more radiant skin underneath. The result is a boost in hydration, smoother texture and a more even-looking complexion.
Because they speed up exfoliation, they can also make skin more sun-sensitive, so daily SPF becomes non negotiable when they’re part of your routine. AHAs are usually most effective in leave on formulas like serums and creams, where they can stay put and steadily get to work.
Alpha-lipoic acid is a naturally occurring compound produced by your body and found in every single cell, pretty important stuff!
It acts as a powerful antioxidant, helping to neutralise free radicals and protect cells from damage (and in some cases, cellular stress that could lead to cell breakdown).
In skincare, it’s also been studied for its potential to improve skin texture and help calm inflammation, making it a multitasking ingredient that supports healthier-looking skin overall.
Made from fermented apples, apple cider vinegar contains naturally occurring malic acid, an alpha hydroxy acid (AHA) along with antibacterial properties. Together, these qualities mean it’s sometimes used in diluted form as a gentle exfoliating or spot-support ingredient in home skincare routines.
For best results, people often choose apple cider vinegar that contains “the mother”, a mix of beneficial probiotics and enzymes that may support the skin’s microbiome. However, it should always be properly diluted before use and never applied directly to the skin, as its acidity can cause irritation or barrier damage.
AFT, (as used in our AFT ND:YAG treatment), is a next-generation evolution of IPL technology designed to take light-based skin rejuvenation to a more precise, comfortable level. It’s particularly used to target concerns like pigmentation irregularities, broken capillaries and overall uneven tone.
What makes this treatment stand out is how refined the light delivery is. Instead of a single broad burst, AFT emits carefully controlled, gentle wavelengths that can work across different layers of the skin in each pulse. This multi-layer approach allows for more efficient targeting of concern areas while keeping the experience more comfortable.
The technology also helps eliminate “hot spots,” meaning the energy is distributed more evenly across the skin, think of it as a smoother, more polished delivery of light. These pulses are then converted into heat and absorbed by chromophores (the parts of the skin responsible for colour), helping to selectively target unwanted pigment and visible vessels while leaving the surrounding skin untouched.
Algin (also known as alginic acid) is a naturally derived ingredient sourced from algae. In skincare and haircare, it’s mainly used as a gentle, natural thickener that helps improve the texture, feel and slip of a formula.
Think of it as the ingredient that gives products that smooth, glide on sensation, making them easier and more pleasant to apply, without directly acting as an active treatment on the skin or hair.
Astringent products cause the contraction of cells. In skincare, this is helpful in reducing oil production and cleansing the skin. Astringents include witch hazel, citric acid and alcohols. Astringents are not suitable for dry or sensitive skin and should be used sparingly so as to not over strip the skin.
Azelaic acid is a naturally occurring acid found in grains like wheats and is an alpha hydroxy acid. It’s a bit of a multitasking skin hero. It’s especially well-loved for helping to calm adult acne and rosacea related breakouts.
Gentle yet effective, it’s suitable for sensitive, redness-prone skin and can also help support the appearance of broken capillaries. On top of its calming benefits, azelaic acid is often used to brighten the complexion and help improve the look of pigmentation, making skin appear more even and balanced over time.
B
Bentonite clay is a naturally occurring volcanic clay that has been used in skincare for its powerful purifying properties.
In water-based masks, it transforms into a kind of skin “magnet”, helping to draw out excess oil, impurities and environmental build-up from the pores while giving the skin a deeply cleansed feel.
It’s also one of the key ingredients in the Esse Clay Mask, where it works alongside kaolin clay to gently detox the skin without stripping it. The result is that satisfying “fresh slate” feeling with clarified, balanced skin that still feels comfortable, not tight or dry.
Think of bentonite as your skin’s reset button: it gets to work like a soft sponge, absorbing excess oil and helping lift away what your skin doesn’t need, making it a go to in weekly purifying rituals.
Benzoyl peroxide is an antibacterial ingredient used to treat acne. It works by killing p.acnes bacteria, unclogging pores and resurfacing. Although effective, it can also be a skin irritant and has been shown to cause dermatitis, redness and increase sun sensitivity. It also affects the skin’s barrier function which can lead to a disrupted skin microbiome and skin sensitivity.
(BHAs) also known as salicylic acid is a chemical exfoliant. It breaks down bonds allowing skin cells to shed easily. It’s lipophilic which means it’s attracted to oil. BHAs penetrate deep into the pore and can dissolve sebum and congestion making it a great treatment for spot prone, congested and acne skins. On top of this, it also has anti-inflammatory properties.
Betaine is a naturally occurring ingredient found in the body that helps keep cells happily hydrated and balanced. Think of it as your skin’s little water manager helping maintain moisture levels so skin feels comfortable, bouncy and well hydrated.
Beyond hydration, betaine has also been shown to help protect the skin from environmental stressors like pollutants and allergens. In skincare formulas, it not only boosts moisture but also gives products that silky, cushiony feel that makes them glide effortlessly onto the skin.
You will have heard of antioxidants but may not know how they benefit your skin. They help to protect it from the free radicals we come across daily such as car pollution, bacteria and smoke which can all affect the skin’s cells. So, an antioxidant = your best buddy. BHT – or Butylated Hydroxytoluene - is a potent, synthetic antioxidant and preservative used in both food and cosmetic products to keep them fresher for longer and defend the skin from everyday obstacles. Despite it being a chemical cousin of BHA which is recognized as safe and there being mixed opinions on whether it is actually detrimental to the skin, what has been proven is that it can be a carcinogen in animal studies. So, in the name of following our heart over our head, we are well and truly a BHT-free zone.
Bisabolol is a soothing compound derived from German chamomile, a plant that has been prized for centuries for its calming and comforting properties.
In skincare, bisabolol is known for helping to calm irritation, reduce visible redness and flakiness and support the skin’s natural healing process. It’s often included in formulas designed for sensitive or reactive skin thanks to its gentle, skin soothing nature.
Blackcurrant seed oil is packed with omega-6 and omega-3 fatty acids, which are well known for their soothing and anti inflammatory properties.
These essential fatty acids help support healthy hydration levels and strengthen the skin barrier, allowing the skin to better retain moisture and stay balanced. Think of it as a nourishing comfort blanket for dry, stressed or sensitive skin.
Blackheads are a type of clogged pore, also known as an open comedone. They form when excess sebum (oil), dead skin cells, and debris build up inside the pore opening.
Because the pore remains open at the surface of the skin, the trapped material is exposed to oxygen in the air. This causes oxidation, which is a chemical reaction that turns the build-up dark brown or black in colour. Contrary to popular belief, blackheads aren’t caused by dirt, but by oxidised oil and skin cells sitting within the pore.
If blackheads are something you struggle with, treatments that combine exfoliation, extractions and a tailored approach to skin health can make a huge difference. At Pfeffer Sal, we have several treatments that are designed to kickstart your skin journey with a fully bespoke approach. The treatment includes advanced skin scanning technology to identify congestion beneath the surface, alongside exfoliation, extractions, LED therapy, customised active ingredients and a tailored treatment plan to help rebalance and refine the skin over time.
Blue light at the specific wavelength of 415nm has been clinically shown to help target and deactivate C. acnes bacteria, the bacteria associated with acne breakouts.
This makes it an effective, non invasive option for helping manage active breakouts while also supporting the prevention of future congestion. Because it works without physically disrupting the skin, it’s often well suited to inflamed or breakout-prone complexions.
At Pfeffer Sal, this targeted blue light technology is incorporated into our LED treatments, where it’s used to help calm blemish activity and support clearer, more balanced skin over time.
“Botanical” is a word used in skincare to describe ingredients that come from plants, think flowers, leaves, roots and everything in between. It’s a nice way of saying “plant-derived,” but it’s worth knowing there isn’t a strict, regulated definition behind the term in skincare.
Because of that, it’s often used quite broadly, so it’s always good to look a little deeper into which specific plant ingredients are actually in the formula.
Botox is the brand name for botulinum toxin, a purified substance originally produced by the Clostridium botulinum bacterium and used in aesthetic treatments.
When carefully injected in small, controlled amounts into specific facial muscles, it works by temporarily blocking nerve signals to those muscles. This reduces their movement, helping to soften the appearance of existing lines and prevent deeper expression lines from forming. The result is a smoother, more relaxed looking complexion over time.
The effects are not permanent and typically last for around 3–6 months, after which muscle activity gradually returns.
Brightening in skincare refers to the process of improving your skin's natural radiance by reducing dullness, uneven skin tone, and hyperpigmentation. The goal is to achieve a luminous, even complexion that reflects light beautifully.
Capillaries are tiny blood vessels that supply blood in the face. When the walls of capillaries break, it causes a visible red capillary on the surface of the skin. The most common causes of broken capillaries are prolonged sun exposure, blowing your nose in cold and flu season or conditions such as rosacea and acne.
C
Caffeine is best known as a stimulant in coffee, but in skincare it also plays a supportive role in helping the skin look fresher and more energised. It’s an antioxidant that helps defend against environmental stressors that can contribute to premature ageing and cellular damage. It has also been shown to temporarily increase blood flow to the skin, helping create a smoother, more hydrated and awakened appearance.
That said, while caffeine is widely used in eye formulations and early research is promising, the scientific evidence for long term clinical benefits in skincare is still evolving. It is generally considered a safe, well tolerated ingredient, working more as a supportive antioxidant and de-puffing aid rather than a definitive corrective treatment.
You’ll find caffeine in targeted eye formulations such as the Wildsmith Active Super Eye Serum, where it is paired with other plant actives to help reduce puffiness, support skin firmness and improve the appearance of dark circles for a more refreshed eye area.
The calendula plant, also known as the marigold, has been used for over 900 years for its medicinal purposes. It possesses anti-inflammatory and antiseptic properties and early research has shown that it can assist in speeding up the healing of wounds, burns and bruising.
Castor oil is sourced from the castor plant. It has been used since egyptian times to treat a number of conditions ranging from constipation through to topical skin complaints. It is rich in ricinoleic acid which is known to have an antimicrobial effect and is therefore recommended as a topical treatment for bacterial, fungal and viral skin infections. However, there are limited clinical studies confirming its efficacy.
Chemical peels are a topical solution applied to the skin to soften the dead skin layer and exfoliate the skin. This, in turn, stimulates cell turnover for smoother skin texture, reduced pigmentation and fewer breakouts. Chemical peels can come in a large range of strengths from gentle resurfacing peels through the medical grade TCA peels that work at a deeper layer for a more intense treatment
What better type of sunscreen to use than one with a thin texture and that’s therefore quick and easy to apply? That’s the advantage of using a sun cream which contains chemical sunscreens, organic carbon-based compounds which create a chemical reaction. They cleverly change UV rays into heat, then release the heat from the skin meaning that after 20 minutes (when applied properly), the skin is fully protected until the next application. However, over-heated skin can increase brown spots and discolouration and because heat can also disagree with rosacea, chemical sunscreens have been known to cause redness too. The cocktail of ingredients it takes to ensure maximum sun care protection, which includes chemical sunscreens, can also result in stinging and irritation and because it gets used up quicker in direct UV light, you need to reapply it more often. There are two types of chemical sunscreens which are a cause for concern when it comes to coral reefs too – oxybenzone and octinoxate. So, we’ve made up our own clever cocktail - a healthy, protected planet combined with healthy, protected skin, with chemical sunscreens not included. Cheers to that.
Chlorophyll is the natural green pigment found in plants that gives them their colour and plays an essential role in photosynthesis.
In skincare, it’s an exciting ingredient being explored for a range of potential benefits, including helping to support a more even looking complexion, assisting acne prone skin, and encouraging the skin’s natural renewal and healing processes.
Research in this area is still emerging, with early studies showing promising results and ongoing work continuing to build a clearer understanding of its full benefits for the skin.
Citric acid is a naturally occurring alpha hydroxy acid (AHA) found in citrus fruits.
In skincare, it’s often used to help support a more even looking complexion by encouraging gentle surface exfoliation and helping to regulate pigment production. This makes it a popular choice for targeting uneven tone and visible pigmentation.
It also works beautifully as a glow boosting ingredient, helping to refresh the skin’s surface so it looks brighter, smoother, and more radiant overall.
“Clean beauty” is a term often used to describe personal care products made without ingredients that are commonly perceived as undesirable or “questionable.”
However, it’s important to note that there is no formal or regulated definition of what qualifies as clean beauty. This means the term can vary widely between brands, with no official guidelines determining which ingredients are included or excluded. Similarly used is 'Green' to describe claims on products and brands which make sustainable or eco claims, again, there is no formal or regulated definition.
As a result, “clean beauty” is more of a marketing description than a standardised category and interpretations can differ depending on the brand or philosophy behind the product. It's a valid reason to always do your research on products and brands.
Cleansing is the simple but essential act of washing your face to keep your skin fresh, balanced and ready for the rest of your routine.
In the evening, your skin has collected quite a bit throughout the day, makeup, SPF, excess oil, pollution and everyday environmental debris. This is where cleansing really earns its place, helping to clear the skin so it can properly recover overnight. In the morning, it helps refresh the skin by removing sweat and natural by products that build up while you sleep.
For a more thorough evening routine, double cleansing is often recommended. The first cleanse helps break down makeup, SPF and surface impurities, while the second cleanse works directly on the skin to deeply purify and rebalance it.
Without proper cleansing, any serums or moisturisers that follow can’t fully do their job, so think of it as the foundation of healthy skin, making sure everything else in your routine can actually get to where it needs to go. That is why we start every treatment with a double cleanse in the Pfeffer Sal clinic.
ClearLift (Q-Switched Nd:YAG laser), as used in the ClearLift + ClearSkin treatment at Pfeffer Sal, is a non ablative laser designed to gently rejuvenate the skin without damaging its surface.
Think of it as a “no downtime” skin renewal treatment. The laser energy is delivered deep into the dermis, where it creates a controlled thermal response that stimulates the skin’s natural repair process. This triggers the production of new collagen, helping to gradually firm and tighten the skin over time.
The laser light is also converted into acoustic sound waves, creating thousands of microscopic points of energy beneath the surface while leaving the surrounding skin completely intact. This means the skin can heal efficiently from these micro-signals, encouraging regeneration while improving overall texture and tone.
Alongside collagen stimulation, ClearLift also can help to break down excess pigmentation, making it a great option for targeting uneven skin tone, melasma, fine lines and early signs of ageing, while keeping the skin’s surface calm, comfortable and mostly unaffected during treatment.
At Pfeffer Sal, one of our dermal therapists will assess your skin, discuss your concerns and goals and help guide you towards the most suitable laser approach for you. We also check that you are medically suitable for laser treatment and do a patch test before proceeding, ensuring everything is safe and appropriate for your skin.
This personalised consultation helps make sure your treatment plan is tailored, effective, and aligned with what your skin needs, so you can move forward with confidence.
ClearLift (Q-Switched Nd:YAG laser), as used in the ClearLift + ClearSkin treatment at Pfeffer Sal, is a non ablative laser designed to gently rejuvenate the skin without damaging its surface.
Think of it as a “no downtime” skin renewal treatment. The laser energy is delivered deep into the dermis, where it creates a controlled thermal response that stimulates the skin’s natural repair process. This triggers the production of new collagen, helping to gradually firm and tighten the skin over time.
The laser light is also converted into acoustic sound waves, creating thousands of microscopic points of energy beneath the surface while leaving the surrounding skin completely intact. This means the skin can heal efficiently from these micro-signals, encouraging regeneration while improving overall texture and tone.
Alongside collagen stimulation, ClearLift also can help to break down excess pigmentation, making it a great option for targeting uneven skin tone, melasma, fine lines and early signs of ageing, while keeping the skin’s surface calm, comfortable and mostly unaffected during treatment.
At Pfeffer Sal, one of our dermal therapists will assess your skin, discuss your concerns and goals and help guide you towards the most suitable laser approach for you. We also check that you are medically suitable for laser treatment and do a patch test before proceeding, ensuring everything is safe and appropriate for your skin.
This personalised consultation helps make sure your treatment plan is tailored, effective, and aligned with what your skin needs, so you can move forward with confidence.
Cocamidopropyl betaine is a chemical derived from coconut oil which is used as a surfactant in products to create a foaming texture. It is a more gentle alternative to other sulphate based surfactants.
Coenzyme Q10 is an antioxidant that the body naturally produces for energy production. However, over the span of a lifetime and exposure to environmental stressors, this production slows affecting the health and appearance of the skin. Topical coenzyme Q10 has been shown to increase cell energy, therefore preventing cell damage and having antioxidant effects.
Collagen is a structural protein found naturally in the skin and connective tissues. Think of it as the skin’s scaffolding, it helps provide firmness, structure, and that plump, bouncy appearance associated with healthy skin.
As we age, the body’s natural collagen production gradually slows down, which can contribute to skin laxity, fine lines and loss of volume over time. Factors such as sun exposure, environmental stress and lifestyle habits like smoking can also accelerate collagen breakdown.
The good news, collagen production can be supported and stimulated through targeted skincare ingredients and professional treatments designed to encourage the skin’s natural renewal processes and support collagen production.
Colloidal oatmeal is created by grinding whole oats into an ultra-fine powder that blends beautifully into skincare products and baths.
Oats are not just for breakfast, inside them are compounds called avenanthramides, which are known for their impressive soothing and anti inflammatory properties. In skincare terms, that means they’re brilliant at helping calm irritated, itchy, or sensitive skin.
That’s why colloidal oatmeal has become a bit of a comforting ingredient for skin concerns like eczema, psoriasis, sunburn, dryness, and irritation, wrapping the skin in gentle, calming care when it needs it most.
Skin is considered compromised when it’s no longer able to properly protect, balance and maintain itself the way healthy skin naturally should. The lipid barrier (or moisture barrier) is the outermost layer of your skin, It locks in hydration and blocks out external irritants
This can become comprimised for a number of reasons, including internal imbalances, allergies, overuse of harsh products, or damage to the skin barrier. When the skin’s natural defence system becomes weakened, it struggles to hold onto hydration and protect itself from external stressors.
As a result, the skin can become more reactive and vulnerable to concerns like sensitivity, redness, dryness, irritation and breakouts, essentially behaving like skin that’s feeling a little overwhelmed and in need of support. It is one of the most frequent condtions we see in new clients and generally can be addressed with nurturing treatments and home care.
Congestion occurs when excess sebum (oil), dead skin cells and debris become trapped within the pores beneath the skin’s surface. Instead of shedding properly, this build-up creates a bumpy, uneven texture and can lead to blocked pores, blackheads or pimples.
A range of factors can contribute to congestion, including dehydration, excess oil production, inconsistent cleansing, heavy products or even frequently touching the face throughout the day.
Think of it as traffic buildup for your pores, when everything isn’t flowing and shedding as it should, the skin can start to feel rough, clogged and out of balance.
Contact dermatitis occurs when the skin reacts after coming into contact with something irritating or sensitising, such as certain ingredients, allergens, fragrances or environmental triggers.
It often appears as redness, dryness, itching, flaking, or in some cases cracked or blistered skin, essentially the skin’s way of waving a little red flag to say, “I’m not happy with this.”
Once the trigger is identified and avoided, the skin will often begin to recover on its own. Alongside this, gentle, non-invasive treatments such as Dermalux LED light therapy can help support the skin’s healing process by calming inflammation and encouraging repair while the barrier restores itself.
Copper peptides are clever little skincare multitaskers known for helping support firmer, healthier looking skin. They work by encouraging the production of collagen and elastin, the proteins responsible for keeping skin feeling strong, bouncy and resilient.
They’ve also been shown to support the skin’s natural production of hyaluronic acid, helping to boost hydration levels while assisting the skin’s repair and renewal processes. On top of that, copper peptides have antioxidant and anti inflammatory properties, helping defend the skin from free radical damage while calming visible signs of stress in the skin.
This is exactly why they’re the star ingredient in the Wildsmith Skin Active Repair Copper Peptide Cream, a treatment focused moisturiser designed to support firmness, hydration and skin vitality in one step. The formula pairs bioactive copper peptides with low molecular weight hyaluronic acid to help leave skin feeling smoother, plumper and more energised over time.
Cortisol, often called the “stress hormone,” is your body’s built-in alarm system, helping you respond to pressure through the fight-or-flight response. It’s useful in short bursts but when levels stay high for too long, it impacts are both physical and mental, including on the skin.
Think of cortisol as a bit of a meddler in your skin’s balance. It can reduce the skin’s ability to hold onto water, leaving it feeling more dehydrated or tight. At the same time, it can nudge the skin into producing more oil, which is why breakouts often make an appearance during stressful periods.
So while cortisol is doing its job behind the scenes, your skin might just be taking notes, sometimes showing dryness, sometimes oiliness and often a bit of congestion when life feels a little too full-on.
Corundum crystals are used in microdermabrasion to provide physical exfoliation. These crystals are similar in structure to sapphires and have a reputation as one of the hardest materials known to man. They are extremely non toxic and non reactive which makes them the perfect crystal to use during skin treatments.
Cruelty Free is an international organisation dedicated to ending animal testing in the cosmetics industry. Their globally recognised Leaping Bunny logo certifies that a product and its ingredients have not been tested on animals at any stage of development.
In the United Kingdom and the European Union, animal testing for cosmetic products is banned, along with the sale of cosmetics that have been tested on animals elsewhere. This means that products purchased within the UK and EU countries meet strict regulations designed to ensure they are developed without animal testing.
Cystic acne and cystic spots appear as hard, painful bumps underneath the skin’s surface. They are often filled with inflammatory discharge and cannot be extracted. Cystic acne is considered to be the most severe form of acne.