Inclusion Criteria:  Diagnosis of Hepatic Steatosis associated with Metabolism (MAFL, also known as Non-Alcoholic Fatty Liver or NAFL) with Controlled Attenuation Parameter (CAP) value of > 269 dB / m when evaluated by Fibroscan transient elastography Alanine aminotransferase (ALT) levels at least 35% above the upper limit of reference values BMI between 25 and 40 kg / m2 Signing of the informed consent and understanding of the procedures to be carried out Not willing to change their current dietary habits (hypercaloric and hyperlipemic)  Exclusion Criteria:  Treatment of NAFL or NASH (Non-Alcoholic Steato-Hepatitis) for at least 3 months prior to the study, with high dose vitamin E (≥200 mg / day), high dose omega-3 (≥500 mg / day), pioglitazone, bile acid sequestrants, statins, GLP-1 agonists, and / or DPP4 inhibitors ("gliptins"), and not having shown a significant biochemical and ultrasonographic improvement History of chronic alcohol or drug abuse Diagnosis of infectious hepatitis or HIV infection Diagnosis of hemochromatosis Celiac disease, inflammatory bowel disease, chronic or recurrent diarrhea Chronic use of laxatives. Pancreatic failure, thyroid dysfunction, severe liver disease, biliary dysfunction (including cholecystectomy and blood bilirubin abnormalities) Uncontrolled diabetes or hypertriglyceridemia greater than 500mg / dL History of regular use (> 3 days) of oral or parenteral antibiotics one month prior to the study Current use of systemic corticosteroids, androgens, clopidogrel, digoxin, acenocoumarol, warfarin, phenytoin, topiramate, lithium, tricyclic antidepressants, monoamine oxidase inhibitors, second generation antipsychotics, amiodarone, tamoxifen, and/or diltiazem. Intake of other probiotics, plant-derived sterols, beta-glucans, red rice yeast (Monascus purpureus), or milk thistle extract (Silybum marianum) or its active ingredients (silymarin, silybin) on a regular basis (> 7 days) in the 15 days prior to entering the study. History of angina or cardiovascular events, cancer, or immunosuppression Chronic, moderate-to-heavy smoking (> 5 cigarettes a day) History of gastro-intestinal surgery in the previous year. Debilitating diseases (advanced liver or kidney disease, severe depression, psychotic symptoms, neurological diseases). Current pregnancy (positive urine test), or planning to become pregnant during the course of the study. Breastfeeding at the time of eligibility assessment Subjects having participated in a clinical study within 1 month prior to eligibility assessment Current use of 4 or more concomitant medications of any type