In controlled settings with non-deficient men, what is the consistent finding regarding Mucuna pruriens and sustained testosterone levels?

Significant, sustained increases in testosterone beyond the normal physiological range are not the primary or consistent finding.

When evaluating the clinical evidence synthesis for general populations, particularly men who are not already suffering from clinically low testosterone (hypogonadism), the literature does not strongly support the claim that supplementing with Mucuna pruriens leads to significant and sustained elevations in testosterone above the typical healthy physiological range. The effects observed are much more subtle and indirect. Positive associations are often confined to situations where the supplement is mitigating a decline caused by underlying factors, such as stress or exposure to toxins, suggesting a normalizing or supportive role rather than initiating a primary anabolic surge.