RIMAN Booster → Serum → Booster explained
Three positions, two products, and the same Booster used twice.
B means Dermatology Booster and S means Dermatology Serum in the Taiwan routine discussed here. The sequence is Booster → Serum → Booster, at the Director’s steps five, six and seven.
The second B is not a third bottle or a typing mistake. It repeats the same Booster after the Serum. Compare the full sequence when learning how these two products are used.
Follow the directions on the relevant products for quantity and application. The letters describe an order; they do not by themselves establish a treatment effect or a rule for every skincare line.
Two-Phase Oil Mist earlier in the routine is a different product. Dermatology Cream follows B → S → B in this example. You do not have to buy every preceding step to ask how your products should fit together.
These articles use the Director’s Taiwan ICD routine as an example. Product names, formulas, sets and directions can differ by market. Check the packaging and your local official RIMAN store before use or purchase.