Cos De BAHA

Cos De BAHA was founded in 2019 by Sung Il Park and Jun Won Lee in Korea. The brand is now operated by JAINA Co., Ltd. in Suwon, with Jun Won Lee as CEO, and its products are made in Korea.

Its philosophy is straightforward: give shoppers well-known actives at meaningful concentrations, at prices that make it easy to stick with a routine. Product names lead with the active, such as VM for vitamin C and MSM, TN for tranexamic acid and niacinamide, or Retinol 2.5, so it's clear what each serum is for.

The range covers serums for common concerns including oiliness, redness, dark spots, dullness, fine lines and dehydration. Many come in jumbo 60ml sizes, which has made Cos De BAHA popular with shoppers who like to use generous amounts.

For shoppers, choose one or two serums for your main concerns rather than layering everything at once. Use vitamin C or tranexamic acid in the morning under sunscreen, keep retinol for the evening, and introduce strong actives gradually. Niacinamide and peptide serums are easy to pair with most routines, and the jumbo sizes are ideal once you know a serum suits you. Store vitamin C serums away from heat and light.