Biohealbo Probioterm Tightening Collagen Serum

This is Biohealbo's Probioterm Tightening Collagen Serum, also known as the "Tantan Collagen Serum." It pairs well with Gua Sha massage, so I use them together. Its watery texture, similar to a hydrating serum, leaves a refreshing finish, making it suitable for use year-round. I am satisfied because it feels like it tightens the skin and pores, giving them elasticity.