Investigating the Effect of Synbiotic and SperiGen Supplementations on Spermatogram in Idiopathic Oligoasthenoteratozoospermia: A Double-Blinded Randomized Clinical Trial.
Zarehoroki A, Vahidi S, et al. • International journal of urology : official journal of the Japanese Urological Association • 2026
The combination of Synbiotic and SperiGen appears to be much more effective than using an antioxidant alone in improving DNA fragmentation, concentration, and progressive motility of sperm in idiopathic oligoasthenoteratozoospermia.
Key Findings
Results
Combination of Synbiotic and SperiGen significantly increased average change in sperm progressive motility compared to SperiGen and placebo.
p = 0.001 for between-group comparison of progressive motility change
73 patients with idiopathic oligoasthenoteratozoospermia (iOAT) were randomized into two groups
Treatment duration was 3 months
One group received SperiGen plus placebo; the other received SperiGen plus 500 mg Synbiotic (FamiLact) daily
Results
Combination of Synbiotic and SperiGen significantly improved DNA fragmentation compared to SperiGen and placebo.
p = 0.001 for between-group comparison of DNA fragmentation change
DNA fragmentation is associated with ROS-induced damage to sperm DNA
Both groups received SperiGen as an antioxidant agent throughout the trial
Results
Combination of Synbiotic and SperiGen significantly reduced levels of non-motile sperm compared to SperiGen and placebo.
p = 0.018 for between-group comparison of non-motile sperm levels
This was one of three semen parameters that showed significant between-group differences
Results
Within-group analysis showed that all semen parameters were significantly improved in both treatment groups, with one exception.
The exception was non-progressive motility in the SperiGen and placebo group, which did not reach significance
Within-group improvements were observed in both the Synbiotic plus SperiGen group and the SperiGen plus placebo group
Parameters assessed included sperm concentration, progressive motility, non-progressive motility, non-motile sperm, and DNA fragmentation
Methods
The trial was a double-blind randomized clinical trial conducted on infertile males with idiopathic oligoasthenoteratozoospermia (iOAT).
73 patients with iOAT were blindly randomized into two groups
One group received SperiGen plus placebo; the other received SperiGen plus 500 mg Synbiotic (FamiLact) daily
Semen parameters were measured before and after the 3-month intervention
Registered as IRCT20190810044500N6, registration date 2020-09-05
Background
Antioxidants are proposed to scavenge reactive oxygen species (ROS) that reduce sperm motility, cause DNA damage, and lead to apoptosis in sperm cells.
Male infertility is influenced by quantitative and qualitative impairments in spermatogenesis
SperiGen is described as a multivitamin-mineral supplement for men helping to improve male fertility used as an antioxidant agent
Synbiotic (FamiLact) was administered at 500 mg daily as the probiotic/prebiotic component
Zarehoroki A, Vahidi S, Sahebnasagh A, Shahsavan R, Nabi A, Meybodi M, et al.. (2026). Investigating the Effect of Synbiotic and SperiGen Supplementations on Spermatogram in Idiopathic Oligoasthenoteratozoospermia: A Double-Blinded Randomized Clinical Trial.. International journal of urology : official journal of the Japanese Urological Association. https://doi.org/10.1111/iju.70255