What is bentonite clay in skincare?
Bentonite clay forms when volcanic ash weathers in seawater, converting volcanic glass into fine clay particles. Its dominant mineral is montmorillonite, which carries a strong negative surface charge when wet.
That charge is the mechanism. It attracts positively charged particles – sebum components, dirt, some bacteria – and binds them for rinsing away. Reviews of bentonite as a natural remedy document that adsorptive capacity alongside antibacterial and anti-inflammatory activity.
What skin concerns does bentonite clay treat?
It is one of the most absorbent cosmetic clays, which makes it a strong fit for oily skin, congestion and body or back acne. It also appears in some sunscreens, where it improves how well the product stays on the skin.
Research on bentonites and montmorillonites points to cutaneous benefits including barrier support and irritation relief. Its strength is also its risk: on dry or sensitive skin it strips too much, leaving tightness and rebound oil.
What ingredients are best paired with bentonite clay?
Mix it with water or a hydrosol rather than vinegar, which adds needless irritation, and pair it with glycerin, aloe, honey or colloidal oatmeal to buffer the drying.
Follow every mask with a hydrating serum and moisturiser. Because it is a natural mineral there is some risk of heavy-metal contamination, so choose a brand that publishes purity testing. Use once weekly, not daily. Take our Skin Quiz.
What is acne?
Acne vulgaris is a chronic inflammatory condition of the pilosebaceous unit – the hair follicle and its attached oil gland. It produces blackheads and whiteheads, inflamed papules and pustules, and in severe cases deep nodules and cysts.
It is the most common skin condition worldwide, and it is not a hygiene problem. Acne begins with a microcomedone forming invisibly inside the follicle, weeks before anything shows on the surface.
What causes acne?
Four mechanisms work together: excess sebum driven by androgens, abnormal shedding of cells inside the follicle, overgrowth of Cutibacterium acnes, and the inflammatory response that follows.
Genetics set the baseline. Hormonal fluctuation, stress, high-glycaemic diets, comedogenic products, friction from masks or helmets, and certain medications all push it further. Over-cleansing and picking make it visibly worse.
What ingredients are best for acne?
Salicylic acid clears inside the pore, benzoyl peroxide reduces bacterial load, and retinoids prevent the plug forming in the first place – that last one is the most valuable long-term.
Azelaic acid and niacinamide reduce inflammation and the marks left behind, and sulphur or clay help oily, congested skin. Keep the barrier intact with a gentle cleanser and a light non-comedogenic moisturiser; stripped skin produces more oil. Take our Skin Quiz.
