This highly concentrated revitalising serum is specifically formulated for tired, dull, lack-lustre skin that has a loss of tone and colour. Using the marine ingredient, Spirulina, for its revitalising, nutritious and regenerating properties, the Intensive Spirulina Serum will leave the skin radiant, totally revitalised, firmer, smoother and better toned.For very dull, tired skin, regardless of the cause (age, sun, genetic or hormonal factors, dieting, health).