In diabetic male rats, adding a small amount of sesame oil to their diet helps improve sperm movement and health, but a larger amount doesn't help — suggesting there's a sweet spot for how much works best.

What we've found so far does not support the idea that sesame oil improves sperm health in diabetic male rats, and there is no clear evidence that dose matters. Our analysis of the available research shows that, contrary to one claim suggesting a benefit, 12 studies refute the idea that sesame oil improves sperm movement or overall sperm health in diabetic male rats [1]. While one claim suggested there might be a "sweet spot" where a small amount of sesame oil helps but a larger amount does not, the evidence we’ve reviewed does not back this up. In fact, the weight of the data we analyzed leans against any meaningful improvement in sperm health, regardless of dose [1]. We recognize that the presence of one supporting claim could suggest a possible area for further study, but based on what we've reviewed so far, the findings do not point toward a beneficial effect. It’s possible that differences in study design, rat models, or how sperm health was measured could explain conflicting signals, but we can’t determine that from the evidence provided. Our current analysis shows that, at this time, there is no consistent support for sesame oil improving sperm health in diabetic male rats. We also cannot conclude whether dose plays a role, as the evidence does not show a pattern where lower amounts help and higher amounts don’t. As we continue to analyze new data, our understanding may change. For now, what we’ve found leans against the idea that sesame oil benefits sperm health in this specific context. Practical takeaway: Based on the current evidence, adding sesame oil to the diet of diabetic male rats is unlikely to improve sperm health.