Only used once . The Plexaderm Skincare Rapid Pore Reduction Serum is a potent anti-aging product specifically designed to reduce the size of pores quickly. With a volume of 10 mL (0.33 fl oz), this serum is formulated to provide targeted benefits to the skin, helping to reduce the appearance of enlarged pores and improve overall skin texture. Ideal for those looking to achieve a smoother and more refined complexion, this product from Plexaderm Skincare is a valuable addition to any skincare routine.