Statins Beat Every Supplement Tested for LDL Reduction — But the Study Has Flaws

The SPORT trial, conducted at the Cleveland Clinic and published to considerable attention, randomized participants to receive either a starting dose of rosuvastatin (Crestor), a placebo, or one of six dietary supplements: fish oil, cinnamon, garlic, turmeric, plant sterols, or red yeast rice. The primary outcome was change in LDL cholesterol after approximately one month. The results were stark — rosuvastatin reduced LDL by an average of 35%, and critically, every single participant on the drug saw their LDL go down, with reductions ranging from 18% to over 50%. By contrast, the supplements performed no better than placebo, with individual responses resembling a coin flip between LDL rising or falling.

While the headline result — statins outperform supplements — is not surprising, Greger dissects serious methodological concerns. The trial was funded by AstraZeneca, the maker of Crestor, which still earns over a billion dollars annually despite the drug being off-patent. The supplement selection raises red flags: fish oil and cinnamon are not marketed as cholesterol-lowering agents, and turmeric requires at least eight weeks to show modest effects (under 10 mg/dL reduction) — far longer than the trial's one-month window. The red yeast rice brand chosen was independently found to contain zero active monacolins, the compounds responsible for its LDL-lowering effects, making its inclusion arguably a straw-man comparison. The garlic product used was odor-free and contained 15 other ingredients, stripping out the active sulfur compounds shown to lower LDL at doses as low as one-eighth of a teaspoon of garlic powder daily.

Notably absent from the trial were supplements with stronger evidence bases: berberine, bergamot, psyllium, and artichoke extract — all of which have meaningful LDL-lowering data. The plant sterol product used also contained questionable ingredients and may not have been given sufficient time to act, though phytosterols typically show effects within two weeks.

A broader and actionable lesson emerges: dietary supplements are poorly regulated in the U.S., and label claims often do not match actual content. Greger advocates for whole foods over extracts wherever possible — real garlic powder instead of garlic supplements, barberries instead of berberine capsules, artichoke hearts instead of artichoke extract. These deliver the active compounds in their natural matrix without the regulatory gray zone.

For longevity-focused individuals, the video reinforces that statins, at starter doses, are highly effective and have decades of safety data behind them — and should not be dismissed based on supplement misinformation. At the same time, the evidence-backed dietary approach (including the Portfolio Diet, plant sterols from whole foods, and other food-based interventions covered in Greger's broader series) remains a powerful adjunct or alternative for those unwilling or unable to take statins. The critical takeaway is to evaluate supplement studies with a sharp eye toward funding sources, product quality, and whether the most evidence-supported comparators were even included.