Leeposh Vitamin C Hyaluronic Acid is made of polysaccharides that bond with moisture on and within the skin to help fill in and plump fine lines, How to use the serum with dermaroller 1)Apply Vit c+ Hyaluronic Acid Serum All over Face 2) The roller is moved across the area of skin to be treated in a series of sequential movements. 2) Press firmly but do not overdo this to avoid any unnecessary discomfort. 3) One way of using a roller is to imitate the points of a compass and roll it front, left, right and then backwards. This ensures even coverage without overdoing it. 4) Re- Apply coat of serum 7 CLEAN SKIN AFTER 3 HOURS 5) Your skin will feel warm and tight after use and will have a reddish colour similar to a case of mild sunburn. This is entirely normal and will ease within 24 hours. 6) Clean If any redness or bleeding & finally apply 1 more coating of serum all over face & wash face after 3 hours