Taking 0.15 mg of nonivamide every day for 12 weeks does not change the patterns of metabolites in the blood or the types of bacteria in the gut of moderately overweight adults.

We analyzed the available evidence on whether 0.15 mg of nonivamide daily for 12 weeks affects blood metabolites or gut bacteria in overweight adults. What we’ve found so far is that 60.0 assertions support the idea that this dose and duration do not change the patterns of metabolites in the blood or the composition of gut microbiota [1]. No assertions in our review contradicted this finding. Nonivamide is a compound related to capsaicin, often used in topical pain relief, but here we’re looking at a very low oral dose—150 micrograms—taken daily over three months. The metabolome refers to all the small molecules in the blood, which can reflect how the body is processing food, energy, and waste. Gut microbiota are the trillions of bacteria living in the digestive tract, known to influence metabolism and inflammation. Changes in either could suggest a biological effect from the supplement. The evidence we’ve reviewed does not show any measurable shift in these systems after 12 weeks of use. This doesn’t mean nonivamide has no effect on the body—only that, at this specific dose and timeframe, we didn’t see changes in these two specific areas. It’s possible effects exist in other systems, or at different doses, or over longer periods—but we don’t have data to say that. We also note that all 60.0 assertions come from the same body of evidence, and no studies were found that tested alternative outcomes or challenged this conclusion. While the number of assertions is high, we don’t know how many unique studies they represent, or whether the methods used were equally rigorous across all. For someone considering this supplement, the current evidence suggests that taking 0.15 mg daily for 12 weeks is unlikely to alter blood metabolites or gut bacteria in overweight adults. But without more detailed study designs or longer-term data, we can’t say whether other benefits or effects might still exist.