Fast reoiling after washing is affected by personal physical condition and cleansingproduct formula, bringing subjective user sensations. Yuanqibang uses glycerinfree formula with invitro model tests for R&D reference, aiming for balanced washing experience for oily scalps. Note: These results are in-vitro laboratory model test results, for formulation R&D reference only. They do not represent equivalent effects on human body. Actual user experience may vary.