Participants will be divided into intervention and placebo groups in a ratio of 1:1 using random blocks (www.randomization.com) by a research assistant not involved in the study. For this purpose, the codes A and B will be assigned to the supplement or the placebo, and the researchers will not know which code is for the placebo or the supplement until the end of the study. In the method of using random blocks, we can create blocks and assign codes equally to each block. If we specify two codes in each block, we can make two possible sequences AB and BA. When we randomize the blocks, the same codes can be assigned to each group. If the block size is four, we can make six possible sequences (AABB, ABAB, ABBA, BAAB, BABA, BBAA) and then randomize them. The drawback of this method is that the presenter can predict the code of the next person. For example, if the block size is two, we can easily know the fact that B comes after A, or if the block size is four, we can predict what the last code will be. This is against the principle of randomization. To solve this problem, the research assistant who performs the randomization has hidden the block size from us and uses randomly mixed block sizes. For example, the block size can be two, four, and six. The codes will be provided to the researcher in a sealed envelope.