Urolithin A raised muscle strength by about 12% in one four-month study, but the main test of muscle power did not improve. The article reviews human studies of Urolithin A, including a 2022 study in middle-aged adults. It also covers a 2026 review that combined results from two studies. Together, the findings suggest a possible strength benefit, not a clear improvement across all movement tests. The distinction between strength and power matters here. Strength measures how much force muscles can produce. Power also involves how quickly they can produce it. The four-month study's main planned measure was peak power, which did not improve. The roughly 12% strength gain was a separate result. That makes the findings mixed, rather than a simple win. The combined review found a 17-meter gain in distance walked in six minutes. But the result was too uncertain to rule out chance. It does not establish that the supplement helps people walk farther. The article also notes an important funding detail. Most human research has been sponsored by Amazentis, which sells Urolithin A as Mitopure. That does not erase the results, but independent studies would strengthen confidence. For BioSocial members, this is a reason to compare specific numbers, not just impressions. Logs of the same strength task over time could make community notes more useful. Recording dates and changes in exercise habits adds context. Personal trends cannot prove what caused a change, but they can show whether a hoped-for benefit appeared. If you've tried Urolithin A, what changed—or stayed the same—in your strength numbers over time?