Is Red Meat Bad for You? Not as Bad as Bacon, Research Finds

Few foods start arguments like red meat.

One headline says a burger will shorten your life. The next says the warnings were overblown.

Both sides are partly right. It depends on what kind of meat you mean, and how much.

Here’s what the biggest studies found, how much is too much, and why bacon and steak shouldn’t be lumped together.

Is red meat bad for you?

The short answer: processed meat looks worse than plain red meat, and smaller amounts look safer than large ones.

The World Health Organization’s cancer agency classes processed meat as a cause of bowel cancer. It classes red meat as a probable cause.

For plain red meat, a careful 2022 review found only weak evidence of harm. The risks it found were small and uncertain.

That doesn’t make red meat a health food. But it does mean a steak once or twice a week is a very different thing from bacon every morning.

Red meat vs processed meat: what’s the difference?

These two words get mixed up a lot, and the difference matters.

Pork counts as red meat. Chicken and turkey don’t, but sliced chicken or turkey from the deli counts as processed meat, the NHS says.

What the research shows

A review of 55 studies on plain red meat

The main source is a 2022 review in Nature Medicine, from the Institute for Health Metrics and Evaluation at the University of Washington.

The team pulled together 55 reports, covering 37 long-term studies that followed people’s diets and health. Follow-up ranged from about 4 to 32 years.

They looked only at unprocessed red meat. Then they asked a stricter question than most reviews: how strong is the evidence, once you account for how much studies disagree?

What they found

These are cautious, lower-end estimates. They compare people who ate typical amounts with people who ate none.

The authors’ average estimates were higher. For bowel cancer, eating 50 g a day was linked to about 30% higher risk, but with a very wide range.

What “weak evidence” means

Weak doesn’t mean safe. It means the studies point in the same direction, but they disagree a lot about how big the effect is.

The risk across all six problems was lowest at zero red meat. But the uncertainty was huge: the lowest-risk amount could be anywhere from 0 to 200 g a day.

Their conclusion: the evidence is too weak for strong advice about exactly how much to eat.

Processed meat: a clearer signal

Processed meat is a different story. In 2015, the WHO’s cancer agency reviewed more than 800 studies.

It put processed meat in its highest group, meaning there is enough evidence that it causes bowel cancer. Red meat went one group lower, as a probable cause.

The experts estimated that each 50 g of processed meat eaten daily raises bowel cancer risk by 18%. That’s roughly two slices of ham.

An 18% rise doesn’t mean 18 in 100 people get cancer. It means a small risk gets somewhat bigger.

In 2025, the team behind the 2022 review used the same strict method on processed meat. Compared with eating none, eating up to about 57 g a day was linked to at least 11% higher diabetes risk.

It was also linked to at least 7% higher bowel cancer risk. The team rated this evidence as weak too, but it still advised limiting processed meat.

A 2024 study of nearly 2 million people

The newest big study looked at type 2 diabetes. It pooled data from 31 studies in 20 countries, covering 1.97 million adults.

Over about 10 years, 107,271 of them developed type 2 diabetes. The team compared what people ate with who got sick.

A 50 g portion of processed meat is about two or three slices of bacon. A 100 g portion of red meat is about a small steak or a medium burger.

Poultry was linked to a smaller rise too. But that result was weaker when the team tested it in other ways.

Swapping matters

The team also modelled swaps. Replacing 50 g of processed meat a day with 100 g of plain red meat was linked to 7% lower diabetes risk.

Replacing it with 100 g of poultry was linked to 10% lower risk. Swapping plain red meat for poultry made no clear difference.

So in this study, cutting processed meat looked like the most useful change.

The catch

Here’s what I’d keep in mind. Almost all of this comes from observational studies, which show links, not proof that meat causes disease.

People who eat lots of processed meat may also smoke more, move less or eat fewer vegetables. Studies adjust for this, but never perfectly.

Most studies asked people about their diet once, at the start. People are also not great at remembering what they ate.

And the comparison food matters. Red meat replaced by beans is not the same as red meat replaced by white bread.

Who funded it

The 2022 review was funded mainly by the Gates Foundation and other public and charity funders. The authors reported no competing interests.

The 2024 diabetes study was funded by the EU and UK public research bodies. Two authors reported past dairy industry funding.

How much red meat is too much?

No one knows the exact safe amount. The WHO says the data didn’t allow a conclusion on whether a safe level exists.

The NHS gives a practical limit. If you eat more than 90 g of red and processed meat a day, it suggests cutting down to 70 g.

That’s cooked weight, averaged over the week. Here’s what common portions weigh, according to the NHS:

So one cooked breakfast puts you well over the daily average. You’d need to eat less meat on the days that follow.

Does red meat have any benefits?

Yes. Red meat is a good source of protein, iron, zinc and B vitamins, the NHS says.

It’s also one of the main sources of vitamin B12.

That’s why most advice says limit red meat, not avoid it. Lean cuts are better than fatty ones, and grilling is better than frying.

If you eat less meat, fish, eggs, beans and lentils are all good sources of protein.

We looked at one of them in our article on eggs and cholesterol.

What earlier research found

A 2023 review linked both types to heart disease

A 2023 review in the European Heart Journal pooled 43 studies with about 4.46 million people.

Each extra 100 g a day of plain red meat was linked to 11% higher risk of heart and blood vessel disease. Each extra 50 g of processed meat was linked to 26% higher risk.

Links with stroke and diabetes were stronger in Western countries.

A 2019 panel said keep eating as you do

In 2019, a panel in the Annals of Internal Medicine reviewed the evidence using strict grading rules.

It judged the certainty of the evidence as low. It suggested adults continue their current red and processed meat intake, as a weak recommendation.

That put it at odds with the WHO and many national guidelines, which advise limiting red and processed meat.

Trials found little change in blood sugar

A 2023 review pooled 21 randomised trials that compared diets with more or less red meat.

Red meat made no clear difference to most diabetes warning signs, such as fasting blood sugar and insulin resistance. But the trials measured blood tests, not diabetes itself.

This review was funded by the Beef Checkoff, a US beef industry programme. That doesn’t make it wrong, but it’s worth knowing.

How it fits together

The long-term studies keep finding the same direction: more meat, especially processed meat, means more disease. The size of the effect is still argued over.

How much should you trust this?

Promising. The links are consistent across huge studies and many countries. But they are links, and for plain red meat they are weak.

What makes it convincing

• Millions of people were followed for years, in many countries.
• Different research teams keep finding the same direction.
• The WHO’s cancer agency judged the evidence on processed meat and bowel cancer strong enough to call it a cause.

What makes me cautious

• There are no long-term trials of red meat and disease. Nobody can randomly assign people to eat steak for decades.
• Diet was mostly self-reported, often only once.
• The cautious estimates for plain red meat were small, some as low as 1%.

What this means for you

• Cut processed meat first. Bacon, ham, sausages and salami had the clearest links. Treat them as occasional foods.
• Keep red meat moderate. The NHS suggests no more than 70 g of cooked red and processed meat a day on average.
• Watch the swap. Replace meat with fish, beans, lentils, eggs or poultry, not with refined carbs.
• Choose lean cuts. Trim visible fat and grill rather than fry.
• Don’t panic about one meal. These are small risks that build up over years of eating habits.
• Have a family history of bowel cancer? Ask your doctor about screening.

The NHS guide to meat in your diet explains portion sizes and healthier choices.

In this short video, PBS NewsHour explains how big the cancer risk from processed meat really is:

What we still don’t know

1. Is it the meat, or the people who eat it? Better studies that track diet over time could help.
2. What’s the safe amount? No study has pinned down a clear limit.
3. Does cooking matter? Charring and high heat may add risk, but few studies measure it well.
4. What about poultry? The diabetes link for chicken is newer and less certain.

My take: bacon is the real problem

What I like about the 2022 review is its honesty. It didn’t just ask “is there a link?” It asked “how sure can we be?”

I’m less convinced by headlines that treat a steak and a hot dog as the same thing. The evidence clearly splits them.

So my reading is simple. Make processed meat an occasional treat.

Enjoy red meat in modest amounts, and fill the rest of your plate with plants.

If you already eat this way, there’s little reason to worry.