Statins: How They Work, Who Needs One, and the Side Effects

Updated July 2026

Statins are the most widely prescribed cholesterol lowering medications in the world, and also some of the most feared and debated. Patients ask me every week whether they really need one, whether it will wreck their muscles or their memory, and whether food could do the job instead. Here is the balanced picture: what statins do, who genuinely benefits, what the real risks are, and what your alternatives look like.

What do statins actually do?

They lower your LDL cholesterol by slowing how much your body makes. Statins block an enzyme in the liver called HMG-CoA reductase, the rate-limiting step in LDL cholesterol production. With less cholesterol being made, circulating LDL levels fall. Statins also do two other useful things: they calm inflammation in the artery wall and help stabilize existing plaque so it is less likely to rupture and cause a heart attack.

How much do statins lower cholesterol?

Between about 30% and 55%, depending on which one and what dose. The high-intensity options, atorvastatin (Lipitor) at 40 to 80 mg and rosuvastatin (Crestor) at 20 to 40 mg, lower LDL by 50% or more. Moderate-intensity statins like simvastatin, pravastatin, and lower doses of the others land in the 30 to 45% range. That kind of drop is powerful, and it translates into meaningfully fewer heart attacks and strokes, especially for people who already have heart disease.

Who should be on a statin?

It comes down to your overall risk, not your cholesterol number alone. The March 2026 ACC/AHA guidelines set lower LDL goals than ever (under 100 for most adults, under 70 for those at high risk, and under 55 for those with established cardiovascular disease), which means more people now qualify for treatment — and will likely require higher drug doses and more drugs to get to goal. In general, a statin makes the most sense if you already have heart or vascular disease, have diabetes, have familial hypercholesterolemia, or carry enough risk factors that your estimated risk crosses a treatment threshold. Who should be on statins walks through how that decision is actually made.

What are the side effects of statins?

Most people tolerate statins well, but a few concerns come up constantly, and they deserve honest answers. The big one is muscle aches, which are real for some people but far less common than the internet suggests, and may even turn out to be the nocebo effect. Statins can also nudge blood sugar upward and slightly raise the risk of developing Type 2 diabetes, especially in people already headed that way. The memory and dementia fears are not supported by good evidence. And the worry about kidney damage is largely misplaced. For the full rundown, see statin side effects.

Do the benefits outweigh the risks?

For the right person, clearly yes. In people at meaningful risk, lowering LDL with a statin reduces the chance of a heart attack or stroke substantially, and the serious side effects are rare. But "the right person" is the key phrase. The higher your baseline risk, the more a statin does for you; the lower your risk, the smaller the absolute benefit, and the more reasonable it is to focus first on food and lifestyle. This is a decision to make with your doctor, weighing your actual numbers and risk. No matter what, a high LDL alone should not just reflexively generate a prescription.

Can you lower cholesterol without a statin?

Often, yes, especially if your risk is not high and your LDL is not extremely elevated. Diet is the most powerful lever most people never fully pull, and you might not need a statin if the right dietary changes bring your numbers to goal. Even when you do need medication, eating well means you often reach your target with a lower medication dose. The nutrients that matter most, fiber, plant sterols, and omega-3s, are exactly what Step One Foods delivers, and what our clinical trial was built to prove.

What if you can't tolerate a statin?

You have more options than ever. If a statin is not tolerated or is not enough on its own, there are now several other cholesterol-lowering drugs that work through different mechanisms, from ezetimibe to bempedoic acid to the injectable and now oral PCSK9 inhibitors. The newer cholesterol drugs are worth understanding, because the right combination can get almost anyone to goal.

Can you ever stop taking a statin?

Sometimes, but it depends on why you were put on it. If you have established heart disease, a statin is usually a long-term commitment, because its job is to keep protecting arteries that have already shown they are vulnerable. If you were started on one mainly for prevention and you dramatically improve your diet, weight, and other risk factors, there are cases where you and your doctor may decide to lower the dose or stop. That is a conversation to have together, with repeat testing, not a decision to make on your own.

Statins are a genuinely valuable tool, and I prescribe them. But they work best as part of a comprehensive plan, not a substitute for it. The better your diet and lifestyle, the less medication you tend to need, the better it works when you do, and the more you lower your risk in ways no pill can match.

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