Heart & cholesterol

Real LDL reduction

Plant sterols & stanols are the most boringly reliable option here. They sit in the gut and block cholesterol absorption, and the dose-response is well mapped: a meta-analysis of 124 studies found LDL falls steadily up to about 2 g/day, where you get roughly an 8–9% drop, with little extra benefit above that.¹ The honest caveat is that this is a surrogate win — no trial has shown sterols themselves cut heart attacks, and the enriched spreads and yoghurt-drinks deliver the 2 g far more consistently than a stray capsule does. People with the rare inherited condition sitosterolaemia should avoid them.

Viscous soluble fibre is the one I would actually start with, because it does more than one job. Psyllium at roughly 7–10 g/day lowers LDL and apoB across 28 randomised trials,² and oat beta-glucan at about 3 g/day drops LDL by ~0.19 mmol/L (near 5%) across 58 trials.³ Both carry authorised EFSA and FDA heart-claims, both are cheap, and unlike a sterol they also help with regularity and fullness. See the full fibre guide for forms and dosing.

Red yeast rice is the awkward one. It lowers LDL by about 1.0 mmol/L — as much as a low-dose statin, and a meta-analysis of 20 trials confirmed the effect is essentially indistinguishable from statin therapy.⁴ That is not a coincidence: its active ingredient, monacolin K, is chemically identical to prescription lovastatin. So it “works” precisely by being an unlabelled statin — which is exactly why it is a problem to buy off a shelf (see the warning below).

Right tool — know the target

Omega-3 (EPA+DHA) is constantly sold for “cholesterol,” but it barely touches LDL — if anything EPA+DHA nudges it up. Its real job is triglycerides: at a pharmacological ~4 g/day it cuts them by 30% or more, per the American Heart Association’s advisory.⁵ Whether that prevents heart attacks is where the field openly split. REDUCE-IT gave high-risk statin patients 4 g of EPA-only icosapent ethyl and saw a 25% reduction in major cardiovascular events;⁶ STRENGTH gave a similar population 4 g of EPA+DHA against a corn-oil comparator and found nothing.⁷ The mineral-oil placebo used in REDUCE-IT muddies even the positive result. Practical read: a couple of oily-fish meals a week is a genuine no-brainer; a 4 g prescription dose for high triglycerides is a doctor’s decision, not a supermarket buy.

Berberine is the multitasker of the metabolic aisle. A 2018 meta-analysis of 16 randomised trials in about 2,150 people found it improves the whole lipid panel — LDL and triglycerides — and it lowers blood sugar too, which is why it turns up in metabolic stacks.⁸ Read it with the caveats the authors flag: the trials are small, clinically heterogeneous and mostly short, the raw compound is poorly absorbed (hence 500 mg two-to-three times a day with meals), and it is a real CYP3A4 inhibitor, so it interacts with a long list of medicines. Promising and genuinely active — not a statin substitute.

Over-sold

CoQ10 is the perennial “heart tonic,” and the first thing to say is that it does not lower cholesterol at all. It has two legitimate questions attached. On statin muscle aches, the evidence is mixed: the largest pooled analysis (12 trials) found people reported less muscle pain, weakness and cramp on CoQ10, but the objective muscle-damage marker, creatine kinase, did not move — and the trials are small and subjective.⁹ On heart failure, there is one genuinely encouraging trial, Q-SYMBIO, in which 300 mg/day cut cardiovascular events and deaths — but it was modest in size and has not been convincingly replicated.¹⁰ Reasonable to trial if statin aches are wrecking your day; not something to take “for your heart” if you are well.

Garlic is the herbal that never quite delivers. The most comprehensive meta-analysis (39 trials) found it modestly lowers total cholesterol — about 17 mg/dL — and LDL by roughly 9 mg/dL, but only if you start above 200 mg/dL and stay on it for more than two months.¹¹ Real, but small, and the trials disagree on which preparation matters. Eat it freely; do not count on it as your lipid plan.