SkinCortex

Condition

Acne Vulgaris

A multifactorial follicular condition driven by sebum, keratinization, microbes, and inflammation.

Evidence basis:GuidelineNot a diagnosis

Plain-language overview

Acne is not caused by a single thing. It is the result of multiple skin processes interacting inside the hair follicle.

When sebum production rises, follicle walls shed cells more rapidly, and Cutibacterium acnes signals to the immune system, the follicle becomes inflamed. The visible papules, pustules, and cysts are downstream of this biology.

Understanding acne as a system, rather than as 'oily skin' or 'bad bacteria', explains why different ingredients target different points along the chain.

Mechanism axes

The biology underneath

Each card opens the mechanism page and connects to related ingredients and conditions.

PhysiologyReview

Sebum

Lipid mixture produced by sebaceous glands; substrate for both barrier function and microbial activity.

PhysiologyReview

Follicular Hyperkeratinization

Excessive keratinocyte shedding inside the follicle that contributes to comedone formation.

MicrobiologyReview

Cutibacterium acnes

A commensal anaerobe that, in certain phylotypes and contexts, contributes to acne inflammation.

ImmunologyReview

Inflammation

Innate immune response producing redness, swelling, and discomfort in affected skin.

Ingredient axes

What targets each step

Ingredients commonly discussed in clinical literature in relation to these mechanisms.

antimicrobialGuideline

Benzoyl Peroxide

Antimicrobial / inflammatory acne axis

An oxidizing antimicrobial commonly discussed in inflammatory acne treatment guidelines.

retinoidGuideline

Retinoids

Keratinization / sebaceous axis

Vitamin A-derived agents that normalize follicular keratinization and modulate sebaceous activity.

exfoliantClinical

Salicylic Acid

Follicular keratinization axis

A lipophilic beta-hydroxy acid that penetrates sebaceous follicles and supports orderly desquamation.

anti inflammatoryClinical

Niacinamide

Barrier / inflammation support axis

A vitamin B3 derivative associated with barrier support and anti-inflammatory effects.

Misconceptions

Common claims, mechanism-based reality

Claim

“Acne is caused by dirty skin.”

Mechanism reality

Cleansing alone does not resolve acne. Aggressive washing can disrupt the barrier and worsen inflammation.

Claim

“Oily skin should be stripped of all oil.”

Mechanism reality

Sebum has structural and barrier roles. Over-stripping can trigger reactive sebum production and barrier damage.

Claim

“Diet alone causes acne.”

Mechanism reality

Some patterns (high-glycemic, certain dairy) are associated with flares in studies, but acne is multifactorial.

Open the full graphAll mechanismsAll ingredients

Science Layer

Expert Mode

Manually curated links to public scientific resources — AlphaFold DB, UniProt, Open Targets, PubMed. Not real-time predictions, not treatment guidance.