The This Works in Transit Vitamin C Serum is a 30ml foil-sealed product designed for all skin types. With hyaluronic acid as the active ingredient, this day treatment serum is formulated to be vegan and have a period after opening of 6 months. Its main purpose is age-defying, making it suitable for both men and women looking to improve the appearance of their skin. Perfect for daily use, this serum is ideal for those wanting to combat signs of ageing and achieve a brighter, more radiant complexion.