2.4. Randomization and Blinding
The participants were randomly allocated to sequence A or B by a third-party allocation manager. A randomization list was generated using a stratified method with sex as the stratified factor. The original randomization list was sealed until the key code was broken. The allocation manager or their substitute prepared the test foods. The test foods were bLF and the placebo. The bLF was 100 mg of MLF-1