Lean beef: which cut has the least fat and the most protein

You are at the counter looking at five cuts of beef at roughly the same price, and the question is always the same: which one gives the most protein for the least fat? The short answer is the round — topside, silverside and eye of round. Those sit at around 22 g of protein and only 2–4 g of fat per 100 g raw.

The numbers below are rounded averages. They shift with breed, how the animal was fed, how much visible fat the butcher trimmed and, above all, how you cook the thing.

Per 100 g raw

• Round (topside, silverside, eye of round): about 22 g protein, 2–4 g fat, 110–130 kcal
• Fillet: about 21 g protein, 6–8 g fat, 140–160 kcal
• Rump and sirloin: about 21 g protein, 6–9 g fat, 150–170 kcal
• 5% fat mince: about 21 g protein, 5 g fat, around 130 kcal
• 15–20% fat mince: 17–18 g protein, 15–20 g fat, 220–260 kcal
• Chuck and shoulder: about 19 g protein, 10–15 g fat, 180–220 kcal
• Short ribs: about 17 g protein, 20 g fat or more, over 280 kcal
• Liver: about 20 g protein, 4 g fat, around 135 kcal

The gap between eye of round and short ribs is roughly 150 kcal per 100 g, and the leaner cut still carries more protein. That is the whole point: the spread within one animal is wider than the spread between beef and chicken.

Raw versus cooked

Beef loses 25–30% of its weight in cooking, mostly water, so the protein concentrates. A 150 g raw piece of topside comes off the pan at about 110 g and gives you roughly 33 g of protein. The rule worth keeping in your head: 100 g of cooked lean beef ≈ 30 g of protein.

Cooking changes the fat more than the cut does. A lean steak fried in 20 g of oil is no longer a lean meal — you have added about 180 kcal. Mince works the other way: brown it, drain the pan, and you lose several grams of fat per portion.

No fibre at all

Beef contains 0 g of fibre. That is not a flaw, just a reminder that meat on its own is not a meal. Alongside 130–150 g of topside you want at least 200 g of vegetables and a decent serving of grains or potatoes.

The same structure works cold: lean protein, a grain and vegetables holds together for hours, which is why a bulgur salad survives a morning in a bag while a leafy one does not.

Fitting it into the day

A 120–150 g raw portion delivers 25–33 g of protein and covers one of the three or four protein meals in a day. For an 80 kg lifter that is roughly a quarter to a third of the daily total.

Beef does not need to carry the whole day, and it is expensive for that job. If dinner is a lean steak, the rest can be cheaper and faster — a baked pasta with chicken and broccoli covers a second big protein meal without a second trip to the butcher.

Guidance on red meat generally lands around 350–500 g cooked per week, with processed meat kept as low as possible. That is three or four portions. The evidence is strongest against processed meat; for fresh lean red meat the picture is milder and still unsettled.

Who it suits, and who it doesn't

It suits anyone who struggles to hit iron and zinc. Per 100 g you get around 2–3 mg of haem iron, which absorbs better than plant iron, about 4 mg of zinc and a full day's B12. Women of reproductive age and people who rarely eat meat gain the most here.

It suits you less if money is tight, since chicken is considerably cheaper per gram of protein. If you have gout, raised cholesterol or your doctor has already asked you to cut back on red meat, stay at the low end of the weekly range and stick to the lean cuts only.

Simple combinations

• 150 g topside + 200 g roasted vegetables + 60 g dry rice: about 40 g protein
• 120 g of 5% mince in tomato sauce + 80 g dry pasta: about 35 g protein
• 150 g rump + potato salad with onion: about 32 g protein
• Cubed topside in a yoghurt marinade on skewers — the same marinade used for chicken skewers works on beef, it just needs a shorter time over the heat

Common myths

"Fillet is the leanest cut." It isn't. Fillet is tender and feels light, but topside has less fat per 100 g, the same protein and a lower price.

"Butcher's own mince is better." Fat in mince is invisible and you cannot trim it with a knife. Ask for 5%, or ask them to mince a piece of round in front of you.

"Red meat is fatty by definition." Eye of round has less fat than a chicken thigh with the skin on. The cut matters, the colour doesn't.

"Cook it hard so the fat runs out." Some fat does render, but high heat for a long time gives you dry meat and charred edges. Moderate heat and more frequent turning is the better trade.

When to see a doctor

If you are dealing with fatigue, breathlessness on light effort, pallor or hair loss, do not try to fix it with more steak — get iron and ferritin tested. The same applies if you get pain in the big toe joint (possible gout), have kidney disease, or have already been told to limit your protein intake.

In short

• Best protein-to-fat ratio: cuts from the round — around 22 g protein and 2–4 g fat per 100 g raw.
• After cooking, count on roughly 30 g of protein per 100 g of finished lean beef.
• A 120–150 g raw portion gives 25–33 g of protein.
• Beef has no fibre, so vegetables and grains are part of the meal, not decoration.
• Cooking method can add 150–200 kcal and erase the difference between cuts entirely.