It's resveratrol with two atoms swapped. The change is real: most oral resveratrol is destroyed in the gut and liver before it reaches your blood, and this version survives at roughly four times the rate, though that figure comes from rats, not people ¹. Once inside, it flips the same switches resveratrol does, the fuel-and-stress sensors that put cells into repair mode ². The mechanism is plausible. Whether any of it becomes something a person feels is the open question.

The human evidence is thin, and what exists cuts the wrong way. Eighty adults with high cholesterol took placebo or pterostilbene for six to eight weeks. The high-dose group's blood pressure fell about 8 points systolic, roughly a mild blood-pressure drug. In those same people LDL cholesterol rose 17 mg/dL. People already on a statin were spared the rise ³. The cleanest functional test stacked it with a NAD+ precursor in adults aged 55 to 80, the exact group the marketing targets. Blood levels of the target molecule shot up and held. Muscle strength, soreness, stem cells, tissue: no difference on any of them ⁴. The brain and longevity claims trace to aged rats, with no human trial published ⁵.

Before you buy, this is the one decision to make.

What a year of it buys you. Six months in, the version who took it and the version who skipped look the same. A year out, the taker may carry a slightly worse lipid panel and is out $30 to $500; the skipper has that money and one fewer bottle on the shelf. The longevity payoff that anchors the sales pages has not shown up in a single human trial, so on present evidence neither person's aging trajectory bends ⁴.