



Jan Marini Age Intervention Duality – 30ml | Dual-Chamber Benzoyl Peroxide & Retinol Treatment for Adult Skin
Taxes VAT & duties included — no surprise fees at delivery
A dual-chamber treatment from Jan Marini that dispenses micronised benzoyl peroxide and retinol together — one step for adult skin dealing with breakouts and lines at the same time.
What it does
Adult blemish-prone skin is an awkward problem: the products that help with spots tend to be drying, and the ones that work on lines often make breakouts worse. Duality solves it by keeping the two actives apart until the moment you use them. One chamber holds ultra-micronised benzoyl peroxide, milled fine for better spread; the other holds concentrated retinol, kept stable and separate. You mix them in your palm, so both go on fresh. Peptides, antioxidants and moisturising agents sit alongside to keep skin comfortable — the reason this suits people who've found BPO or retinol too harsh on their own. Over consistent use, skin looks clearer, texture looks smoother, and fine lines and marks look softened.
How to use
On clean skin, dispense one pump from each chamber into your palm, mix, and apply a thin layer over the affected area — once daily to start, building up only if your skin tolerates it. Three things to know: benzoyl peroxide bleaches fabric, so keep it off towels, bedding and clothing; both actives increase sun sensitivity, so a broad-spectrum SPF every morning is essential; and if skin gets dry or irritated, cut back rather than pushing through.
Who it is for
For adults with blemish-prone, combination or maturing skin working on spots and the look of fine lines together. Not for use during pregnancy or breastfeeding — retinoids are avoided in both. Speak to your pharmacist or GP first if you already use prescribed acne treatment, and see a GP for painful, cystic or scarring skin rather than treating it yourself. Patch-test before first use.
Why buy from GlamGlobal
- Fast, fully tracked UK delivery
- Full refund or replacement if anything arrives damaged or faulty
- Buy with confidence
For external use only. Avoid the eye area, lips and nostrils. Not for use during pregnancy or breastfeeding. May bleach hair and dyed fabrics. Patch-test before first use and discontinue if significant irritation occurs. Daily broad-spectrum SPF is essential.
The key ingredients and hero actives for this product are listed in the product description above. For full ingredient list (INCI), please refer to product packaging. All products sold on GlamGlobal are genuine and sourced from authorised suppliers.
Application instructions are included in the product description above. For best results follow the recommended routine for your skin type. If you have sensitive skin or any skin conditions, we recommend patch testing before full application.
Free UK shipping on all orders over £50. Standard UK delivery £4.95 under £50. Delivered in 5-10 business days from dispatch. Europe from £9.95. USA from £9.95. Rest of World from £14.95.
We offer 30-day returns on unused, unopened products in original packaging. For hygiene reasons opened beauty products cannot be returned unless faulty. Email support@glamglobal.com to start a return.
100% Genuine — Guaranteed.
Every product we sell is 100% genuine, sourced directly from authorised suppliers in South Korea, Japan and the United States — the same brands, straight from the source. Join 24,000+ customers who shop with total confidence: fast, fully tracked UK delivery, and a full refund or replacement if anything ever arrives damaged or faulty.
Choose options
