Free UK shipping on all orders. Orders are dispatched within 1–2 business days and typically arrive in 5–9 business days. You'll receive tracking as soon as your order leaves us. International delivery times vary by destination.

If DUA isn't right for you, contact us within 30 days of delivery and we'll sort it out. Products should be returned unused where possible, but if you've tried it and it didn't work for your skin, tell us — we'd rather hear about it.

Apply 3–4 drops to clean skin, morning and night, and gently press it in. Follow with moisturiser, and SPF in the morning. Use it consistently — most people notice a difference around week 8 to 12.

Yes, but not at the same time. Copper peptides and Vitamin C can reduce each other's effectiveness, so separate them — many people use Vitamin C in the morning and copper peptides at night. Same applies to strong acids and retinol.

It's formulated to be gentle enough for daily use and contains no added fragrance. If your skin is very reactive, patch test first and introduce it gradually, as with any new product.