Now you know how to build an effective anti-blemish routine . But do you know why some active ingredients really work, while others promise a lot and deliver little?
The anti-acne skincare market is saturated with formulas marketed with a barrage of technical jargon. As a result, it's hard to know what truly deserves a place on your skin. So we decided to break it all down. Tea tree, green clay, aloe vera, crajiru, activated charcoal… These five natural ingredients have a solid reputation. But where does it actually come from? And do they really deliver on their promises for blemish-prone skin ?
Yes. And that's exactly why!
Tea tree: the go-to natural antibacterial
What it really is
Tea tree essential oil (or Melaleuca alternifolia ) is extracted from a shrub native to Australia. Used for centuries by Aboriginal peoples for its therapeutic properties, it is now one of the most documented active ingredients in natural cosmetics.
What makes it so valuable for blemish-prone skin is its concentration of terpinene-4-ol, a compound with exceptional antibacterial and anti-inflammatory properties.
How does it work on imperfections?
When a pimple forms, it's often because the bacterium Cutibacterium acnes (formerly Propionibacterium acnes ) is proliferating in a clogged pore. Tea tree essential oil directly targets this bacterium by disrupting the integrity of its cell membrane.
In practical terms, when applied locally to an imperfection, it:
- Reduces the bacterial load responsible for inflammation
- Soothes redness thanks to its anti-inflammatory action
- It cleanses the skin by limiting the proliferation of pathogens.
- Prevents new blemishes by maintaining the skin in an environment less favorable to bacteria
Things you need to know before using tea tree
Tea tree oil is potent. If too concentrated, it can irritate sensitive skin. That's why it should be used in appropriate doses, formulated as part of a complete skincare product — and not applied undiluted to the skin.
This is exactly the choice that Nohèm made in its anti-blemish serum : the tea tree essential oil is precisely dosed, for an effective purifying action, without irritating the skin.
Green clay: the purifying mineral
What it really is
Green clay, also called illite, is a naturally occurring sedimentary rock rich in silica, magnesium, calcium, and trace elements. Its green color comes from the chlorophyll and iron oxides it contains.
Used in skincare since ancient times, green clay is now recognized as one of the most versatile purifying active ingredients for treating oily and blemish-prone skin .
How it works on imperfections
Green clay works through a fascinating physicochemical mechanism. Its layered structure allows it to absorb and adsorb a large quantity of undesirable substances present in the skin.
In cosmetic applications, it:
- Absorbs excess sebum like a mineral sponge, mattifying the complexion without drying it out.
- It unclogs pores by suctioning out impurities, blackheads, and accumulated residue.
- It tightens enlarged pores , giving the skin a finer and smoother texture.
- Regulates sebum production in the long term
- Clarifies the complexion by removing dead skin cells that dull the face
Unlike other harsh cleansers, green clay respects the skin's natural balance. It cleanses deeply without destroying the skin's natural hydrolipidic film.
The subtle difference between green clay and white clay
In the Nohèm serum formula, green clay (illite) is listed in the INCI ingredients. White clay (kaolin), on the other hand, is known for its extreme gentleness. Both work synergistically on blemish-prone skin, but green clay offers superior purifying power—particularly suited to clogged pores and oily skin.
Aloe vera: the soothing and restorative
What it really is
Aloe vera ( Aloe barbadensis miller ) is a succulent plant native to Africa. The transparent gel contained in its leaves is one of the oldest and most widely used cosmetic ingredients in the world. This gel is composed of more than 95% water and is enriched with polysaccharides, vitamins, minerals, and amino acids.
On blemished skin , it plays an often underestimated role: that of a peacemaker.
How it works on imperfections
Aloe vera doesn't fight bacteria like tea tree oil, nor does it cleanse pores like clay. Its strength lies in healing and soothing—two major issues when dealing with imperfections.
Specifically, it:
- Reduces redness and inflammation thanks to its anti-inflammatory compounds (aloesin, acemannan)
- Accelerates the healing of pimples by stimulating cell regeneration
- Hydrates without leaving a greasy residue : its gel texture delivers water to the skin without clogging pores
- Soothes irritations caused by other, more intense purifying agents.
- Prevents post-acne scarring by supporting skin renewal
It is the active ingredient that balances purifying formulas: it allows powerful ingredients like tea tree to be combined without causing skin irritation.
Crajiru: the regenerative ingredient of the Amazon rainforest
What it really is
Crajiru ( Arrabidaea chica ) is a climbing plant native to the Amazon, used for centuries by the indigenous peoples of South America to treat skin conditions. Its extract, rich in flavonoids and anthocyanins, gives it remarkable properties for skin weakened by imperfections .
Still relatively unknown in Europe, crajiru is one of those niche ingredients that natural cosmetics are beginning to fully value.
How does it work on imperfections?
Crajiru does not act as a first line of defense against bacteria or sebum. Its role is that of a deep repairer: it intervenes after the imperfection, where other active ingredients stop working.
Specifically, it:
- Promotes cell regeneration by stimulating the renewal of skin cells damaged by pimples
- Soothes skin irritations thanks to its flavonoids with anti-inflammatory properties.
- Reduces residual post-blemish marks by supporting the natural healing process
- Protects against premature aging caused by repeated inflammation: skin that regularly breaks out ages more quickly in that area.
- Strengthens the skin's resistance to external aggressions
Why it is particularly beneficial for acne-prone skin
Blemish-prone skin undergoes cycles of chronic inflammation which, over time, weaken the skin barrier and leave marks. Crajiru works precisely at this point: it supports the skin between flare-ups, reduces the after-effects, and helps maintain more resilient skin in the long term.
It's the asset that we don't see working in the short term — but that makes all the difference in the long run.
Activated charcoal: the detoxifier with a high absorption capacity
What it really is
Activated charcoal is obtained through the controlled combustion of organic plant materials (wood, coconut, bamboo, etc.) at very high temperatures, followed by an activation process that multiplies its porous surface area. The result is a black material with exceptional adsorbent properties: used in medicine since antiquity and now a star ingredient in purifying skincare.
Its ultra-porous microscopic structure allows it to capture impurities, toxins and excess sebum with remarkable efficiency.
How it works on imperfections
Activated charcoal works by adsorption: impurities present in the skin literally attach to its surface, as if attracted by a magnet.
Specifically, it:
- It captures toxins and impurities lodged in pores with unparalleled absorption power.
- It extracts blackheads by binding to the plugs of oxidized sebum that clog the follicles.
- Deeply unclogs enlarged pores , visibly refining skin texture
- Reduces excess shine by absorbing surface sebum without drying.
- It cleanses the skin environment by removing stubborn pollution and makeup residue.
The difference with green clay
Both active ingredients are purifying, but they don't work in exactly the same way. Green clay acts through mineral absorption and regulates sebum over the long term. Activated charcoal, on the other hand, is an adsorbent with immediate and powerful action, particularly effective on surface impurities and heavily clogged pores. Together in this formula, they cover the entire purifying spectrum: deep down and on the surface, in the short and long term.
Why these five assets work together
That's where the true intelligence of a good natural anti-blemish formula lies.
Tea tree oil, green clay, aloe vera, crajiru, and activated charcoal do not all do the same thing. They cover five distinct areas, at each stage of the blemish cycle:
| Active | Main action | Visible result |
|---|---|---|
| 🌿 Tea tree | Antibacterial, anti-inflammatory | Dried-up pimple, reduced redness |
| 🪨 Green clay | Mineral purifier, sebum regulator | Refined pores, clarified complexion |
| 🌱 Aloe vera | Soothing, healing, moisturizing | Skin repaired, comfortable, even |
| 🌺 Crajiru | Regenerating, anti-aging, repairing | Faded marks, resilient skin |
| 🖤 Activated charcoal | Absorbent, detoxifying, exfoliating | Pores unclogged, shine reduced |
Together, they tackle imperfection at every stage of its cycle: formation (excess sebum, clogged pore), development (bacterial proliferation, inflammation), repair (healing, uniformity), and prevention (regeneration, strengthening of the skin barrier).
This is exactly the logic that guided the formulation of the Nohèm anti-blemish serum : a synergistic, 100% natural formula, where each active ingredient has a specific role.
Nohèm anti-blemish serum: these active ingredients combined in an organic formula
The Nohèm Anti-Imperfection Serum concentrates these active ingredients: tea tree, green clay and crajiru in a fluid and light formula, designed for targeted application on imperfections.
The formula also incorporates two complementary active ingredients to further enhance its purifying action:
Seboclear : a targeted cosmetic active ingredient that regulates sebum production at the source and reduces the appearance of imperfections on oily or acne-prone skin.
Organic green tea extract : a powerful antioxidant, it helps neutralize free radicals responsible for chronic inflammation and helps prevent new blemishes.
The formula is certified organic, formulated with 100% natural ingredients, and designed to respect the balance of all skin types — including sensitive skin prone to reactions.
Directions for use: Apply locally morning and/or evening to blemishes on clean, dry skin. Massage with fingertips until absorbed. For optimal results, incorporate into a complete purifying routine.
👉 Discover the Nohèm Anti-Blemish Serum: €19 for 15 ml
What these assets cannot do
Even with the best natural ingredients in the world, targeted treatment is no substitute for a consistent routine. Here are the essentials you shouldn't neglect:
Gentle and regular cleansing is essential. Green clay absorbs sebum, but if the skin isn't cleansed morning and night, impurities accumulate more quickly. A cleanser specifically formulated for combination to oily skin is the first step.
Proper hydration is key. Tea tree oil purifies, aloe vera hydrates—but a light cream is still necessary to maintain balance. Dehydrated skin compensates by producing even more sebum.
Regular exfoliation. Once or twice a week, a gentle exfoliant unclogs pores and allows purifying active ingredients to penetrate more effectively.
Consistency is key. Natural active ingredients work deep down, not just on the surface. Visible results generally appear after 4 to 6 weeks of regular use. Patience is part of the routine.
To go further and build your complete routine step by step, check out our ultimate guide for blemish-prone skin .
FAQ: Your questions about these natural ingredients
Can tea tree oil be used on sensitive skin?
Yes, provided it's incorporated into a carefully measured and balanced formula. Applied undiluted at 100%, it can cause irritation. In a serum like Nohèm's, it's diluted and combined with soothing active ingredients, making it suitable for most skin types.
Does green clay dry out the skin?
Green clay absorbs excess sebum, but it is not drying on its own if the formula is well-constructed. In the Nohèm serum, it is combined with hydrating active ingredients that counteract this risk.
Is aloe vera suitable for oily skin?
Absolutely. Aloe vera gel is one of the few non-comedogenic moisturizing ingredients; it provides hydration without oil, without clogging pores. It's even one of the most recommended ingredients for hydrating combination to oily skin prone to blemishes.
What is the purpose of crajiru in an anti-blemish treatment?
Crajiru is a regenerating and repairing active ingredient of Amazonian origin. It doesn't act directly on the current blemish, but it addresses the damage caused by repeated breakouts: residual marks, weakened skin, and slowed cell renewal. It's the active ingredient that works over the long term to keep skin healthy and resilient between breakouts.
Is activated charcoal too harsh for sensitive skin? In a well-balanced formula, no. Activated charcoal is powerful, but its action is mechanical (it absorbs impurities without a chemical reaction with the skin). Combined with soothing ingredients like aloe vera and crajiru, it can be used on sensitive, blemish-prone skin. However, when used as a pure mask or in high concentrations, it's advisable to test it on a small area first.
Can these active ingredients be used every day?
Yes. That's actually one of the advantages of well-dosed natural formulas: they are designed for daily use, morning and/or evening, without rebound effect.
Do these active ingredients help against post-acne scars?
Aloe vera and crajiru are both known for their healing and regenerative properties and can help reduce residual marks. For more pronounced scars, additional active ingredients (niacinamide, vitamin C) may be helpful.
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