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Weight Loss Impact on Male Fertility

Significative Weight Loss Impact on Oxidative Stress, Metabolic, Hormonal, Inflammatory and Seminal Parameters of Obese Men.

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04186767
Enrollment
20
Registered
2019-12-05
Start date
2019-01-10
Completion date
2023-01-22
Last updated
2023-02-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Metabolic Syndrome, Obesity, Sub Fertility, Male

Brief summary

This is a prospective non-randomized unicentric clinical trial, characterized by the inclusion of obese (BMI\> 35) male with subfertility (sperm count showing low sperm counts and / or motility and / or morphology and / or DNA fragmentation). Patients selected at the endocrinology obesity HC-FMUSP outpatient will be submitted to very low calorie diet (VLCK) for 6 months, being reassessed clinically and laboratorially monthly.

Interventions

DIETARY_SUPPLEMENTVery Low Carb Ketogenic Diet

Patients will be submitted to very low-calorie ketogenic dietary intervention (VLCK) according to the recommendations of the Pronokal® Method program including lifestyle and physical activity guidelines. The ketogenic stage (phase 1-3) consists of a VLCD diet (600-800 kcal / d), with low carbohydrate intake and lipids. The amount of high biological value proteins ranges from 0.8 to 1.2 g / kg of body weight / day. This first stage (ketogenic) is maintained until the patient reaches the goal of reducing the target weight by 80% to be reduced, being variable in time, according to the response of each patient. After this period, it evolved to a non-ketogenic stage, initiating the hypocaloric diet (800 to 1500 Kcal), with progressive introduction of other food groups, reducing weight more slowly. The maintenance stage consists of a balanced diet, ranging from 1500 to 2000 Kcal.

Sponsors

University of Sao Paulo
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Prospective, unicentre, single group

Eligibility

Sex/Gender
MALE
Age
18 Years to 55 Years
Healthy volunteers
No

Inclusion criteria

Obesity in male patients * Metabolic Syndrome (NCEP-ATP III) * Alteration of some of the seminal parameters evaluated in conventional seminal analysis

Exclusion criteria

* Other causes of hypogonadotrophic hypogonadism * Hypergonadotrophic hypogonadism * Contraindications for performance of ketogenic diet: * Type 1 or type 2 diabetes mellitus in insulin use * Food drive * Alcoholism or drug addiction * Severe psychiatric illness * Use of coumarin anticoagulants * Hepatic insufficiency * Severe renal impairment * Hematologic diseases * Cancer in activity, * Cardiovascular or cerebrovascular diseases (arrhythmias, recent myocardial infarction, unstable angina, decompensated heart failure, recent stroke) * Gout * Renal or biliary lithiasis * Major depression or other serious psychiatric illness.

Design outcomes

Primary

MeasureTime frameDescription
Seminal evaluationSix monthsSpermatic counting will be combined to report

Secondary

MeasureTime frameDescription
Hormonal measurementsSix monthsTo evaluate hormonal parameters total testosterone, LH, FSH, insulin before and after intervention.
Inflamatory responseSix monthsTo evaluate cytokines TNFa and IL-6 response before and after intervention.
Adipose tissue evaluationSix monthsTo evaluate adipokines: leptin, adiponectin, UCP-1, FGF21, irisin and PGC1a measures before and after intervention.
Microbiota evaluationSix monthsEvaluate the whole intestinal metagenomics before and after the intervention
Metabolic responseSix monthsTo evaluate the metabolic parameters lipid and glycemic profiles before and after intervention.
Body composition changesSix monthsApply body composition digital analyser pre and post intervention.
Brow tissue studySix monthsThermodynamic evaluation of brown adipose tissue using infrared thermography.
Adipose tissue toxins studySix monthsPersistent organic pollutants measure: 2,3,7,8- tetrachlorodibenzo-p-dioxin (TCDD)
Epigenetic evaluationSix monthsTo evaluate the epigenetic methylation profile of spermatozoa before and after the intervention

Countries

Brazil

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026