To assess the efficacy and safety of the use of probiotics as a food supplement compared to placebo in regulating body metabolism and gut microbiota in overweight or obese subjects.

Inclusion Criteria:

1. 18-45 years old;
2. BMI ≥ 24 kg/m2 or men with a body fat percentage of ≥ 25% and women with a body fat percentage of ≥ 30%；
3. Normal liver function indexes;
4. Willing to complete study-related questionnaires and diaries and complete all clinical visits.

Exclusion Criteria:

1. Those who have been diagnosed with high uric acid or gout are not recommended to participate in the test;
2. Psychiatric or neurological diseases, celiac disease, lactose intolerance, allergies;
3. Have the following diseases: irritable bowel syndrome, ulcerative colitis, fatty liver, liver cirrhosis, etc.;
4. Recently treated with antibiotics (i.e., < 3 months prior to the start of the study);
5. Participants who smoked more than 10 cigarettes per day were excluded;
6. It is not recommended to participate in other special circumstances, such as those who are allergic to probiotic products;
7. Pregnant and lactating women are not suitable for experiments.