Skincare brands have long looked to science to create face creams and serums packed with powerful ingredients designed to slow the signs of ageing. But who knows better what's good for your skin than a doctor? Realising this, a number of top dermatologists, plastic surgeons and research scientists have joined the ranks with their own hi-tech skincare lines. Dermatologist and author Dr Nicholas Perricone created Perricone MD based on research into the ageing effects of inflammation. The brand's Acyl-Glutathione is designed to deliver the powerful antioxidant glutathione into the skin, reducing fragility and thinness while improving moisture absorption. Hong Kong's Dr Kendrick combats ageing with Dorissiderm's Lipid Prescription, an intensely moisturising serum designed to increase the fatty oils necessary to keep skin looking plump and youthful. Harnessing the power of vitamin A (retinyl palmitate), South African cosmetic surgeon Dr Des Fernandes created Environ's AVST line, which uses vitamin A to revitalise the skin and reduce fine lines. It also features strong antioxidants such as vitamins E and C and beta-carotene. Also using retinyl palmitate, Murad's Hydro-Dynamic Ultimate Moisture is designed to lock in moisture for eight hours. A rich hydrating cream from the labs of Dr Howard Murad, it contains avocado, sunflower and olive fruit oils that help retain moisture and improve the skin's texture. Perfective Ceuticals - a United States brand new to Hong Kong that works with doctors, chemists and other medical specialists - has introduced its Divine Brightening Serum, which contains special acids that slow the production of pigmentation-causing melanin. The serum is also said to stimulate collagen production and improve hydration. Founded by Australian cosmetic physician Dr Geoffrey Heber, Ultraceuticals has also launched a brightening product. Even Skintone Serum is suitable for sensitive skin while targeting acne and scarring thanks to two active ingredients - bearberry and salicylic acid. The serum is gentle enough to be used daily, but may cause some tingling at first.