Red Meat

Last reviewed October 2026 · Based on 20 studies

Bottom line

Lean, unprocessed red meat can fit inside a Mediterranean-style eating pattern: in a feeding trial, more lean beef or pork did not worsen most cardiometabolic risk factors. Over the long term, though, large studies link higher intakes of red and processed meat to modestly higher risks of type 2 diabetes, cardiovascular disease and colorectal cancer. This evidence is observational, so it can't prove cause and effect.

What it helps with

Raises type 2 diabetes risk — Harm, evidence grade B (Moderate). Large, consistent prospective cohorts, including a pooled analysis of 1.97 million adults; observational data can't prove cause and effect.
Raises cardiovascular disease risk — Harm, evidence grade B (Moderate). Large, consistent prospective cohorts and meta-analyses; observational data, with small effects.
Raises colorectal cancer risk — Harm, evidence grade B (Moderate). Consistent meta-analyses of large prospective cohorts; observational data can't prove cause and effect.
Raises LDL ('bad') cholesterol compared with plant proteins — Harm, evidence grade C (Limited). Meta-analysis and trials of small samples; LDL is a surrogate marker, not heart disease.

What it is

Red meat is studied as two things: unprocessed red meat, eaten as fresh cuts such as beef and pork [1], and processed meat [2]. The largest pooled analysis tracked intakes from 0 to about 110 g/day of unprocessed red meat and 0 to about 49 g/day of processed meat [3].

What the research says

In the largest analysis to date, pooling individual data from 31 cohorts of nearly 2 million adults, each 100 g/day of unprocessed red meat was linked to a 10% higher risk of type 2 diabetes, and each 50 g/day of processed meat to a 15% higher risk [3]. An umbrella review of 67 meta-analyses rated the processed meat and type 2 diabetes evidence high certainty, and red meat moderate certainty [4]. For cardiovascular disease, a 2023 meta-analysis of 43 studies (4.4 million people) linked 100 g/day of unprocessed red meat to 11% higher risk and 50 g/day of processed meat to 26% higher risk [2]; a 2023 review of 21 cohorts found higher total stroke incidence with both [5]. For colorectal cancer, a 2025 meta-analysis of 60 prospective studies found red meat linked to a 15% higher risk and processed meat to a 21% higher risk [6]. Randomised feeding trials show red meat raises LDL cholesterol compared with plant proteins [7], and raises LDL and apolipoprotein B compared with nonmeat protein even when saturated fat is matched [8]. Replacing red meat with nuts or whole grains has been linked to lower risks of type 2 diabetes and death [9]. A 5-week feeding trial found a Mediterranean-style diet improved blood pressure and lowered cholesterol whether it contained 500 g or 200 g of lean beef or pork per week [1].

Doses used in studies

Pooled analyses report risk per 100 g/day of unprocessed red meat or 50 g/day of processed meat [3][2]. The feeding trials used about 500 g versus 200 g per week of lean beef or pork inside a Mediterranean-style diet [1], and 12% of calories from red meat for 4 weeks in a crossover comparison [10].

Safety and interactions

The main documented concerns are long-term: higher unprocessed and processed red meat intakes are linked to higher risks of type 2 diabetes, cardiovascular disease and colorectal cancer, with the processed meat links the strongest [3][2][6]. The feeding trials we reviewed did not report short-term side effects from the red meat diets [8][1]. Red meat is a food rather than a supplement, so the reviews we used define no upper intake limit; they also report no medicine interactions, pregnancy-specific data or guidance for people with iron overload.

Caveats and open questions

Almost all long-term evidence is observational and cannot prove that red meat causes disease [2]. The effects are small for an individual: about a 10% higher relative risk per 100 g/day of unprocessed red meat [3]. One large review rated the certainty of its evidence low [11]. Whether lean, unprocessed red meat behaves differently from fattier cuts and processed meat is not settled; the trial that found no harm used lean, unprocessed meat inside an otherwise healthy diet [1].