Animal kidney is a lean, vitamin-rich organ meat with standout B12, selenium, and protein per 100 g, especially from beef and lamb.
B12 (Low)
B12 (Mid)
B12 (High)
Beef Kidney
- ~99 kcal per 100 g
- Strong B2 and B5
- Lean, mild taste
Everyday Pick
Lamb Kidney
- ~137 kcal per 100 g
- Very high B12
- Iron-rich profile
Protein-Dense
Pork Kidney
- ~100 kcal per 100 g
- Trim for leanness
- Clean, quick cook
Weeknight Fast
What You Get From Kidney Meat
Organ cuts from beef, lamb, and pork pack dense nutrition in a small calorie budget. Across species, a 100-gram raw portion lands near 100–140 calories with strong protein and barely any carbs. The standout macros: roughly 17–24 grams of protein, 0–1 gram of carbohydrate, and under 4 grams of fat depending on the animal and trim.
Beyond macros, two nutrients jump off the chart. Vitamin B12 ranges from high to sky-high, and selenium often meets or surpasses a full day’s target in a single serving. Riboflavin (B2), niacin (B3), and iron also show up in useful amounts.
Macro Snapshot By Species (Per 100 G)
| Item | Calories | Protein |
|---|---|---|
| Beef kidney | ~99 kcal | ~17.4 g |
| Lamb kidney | ~137 kcal | ~23.6 g |
| Pork kidney | ~100 kcal | ~16 g |
Why B12 And Selenium Stand Out
B12 supports red blood cell formation and nerve function, and organ cuts are among the richest food sources. Beef kidney provides about 27.5 micrograms per 100 grams while lamb can land near 78.9 micrograms. Selenium backs antioxidant enzymes; values often sit around 140–220 micrograms per 100 grams across these kidneys. For background on these nutrients, see the Vitamin B12 fact sheet and the selenium fact sheet.
That means a single plate can supply many days of B12 for most adults and a full day of selenium. If you already take supplements, match food intake and pills sensibly to avoid piling on more than you need.
Serving Sizes And Real-World Portions
Butchers sell kidneys whole, sliced, or diced. A home portion usually ranges from 85 to 150 grams after trimming. Fry-ups, pies, and stews often cross that range, while pâtés use smaller amounts. Cooking causes water loss, so cooked weights look lighter than raw weights for the same starting piece.
Taste, Prep, And Cooking Tips
Freshness matters. Choose firm organs with a clean scent. Rinse, split to expose the white core, and trim any tough membrane. A brief soak in cold water or milk can soften the mineral edge, though it’s optional.
Fast Cooking
Kidney turns tender when cooked briefly over high heat. Stir-fry thin slices in butter or olive oil and pull them the second they firm up. Overcooking dries the texture.
Slow Cooking
For pies, braises, and stews, pair kidney with beef or lamb cubes. A gentle simmer lets connective tissue soften while the sauce builds depth.
Minerals, Vitamins, And What The Numbers Mean
Numbers vary with the animal and cut. Across common entries, beef kidney per 100 grams lists about 141 micrograms of selenium and 2.8 milligrams of riboflavin, while lamb kidney reaches about 219 micrograms of selenium and 2.1 milligrams of riboflavin. Iron ranges from about 4.6 milligrams in beef to 12.4 milligrams in lamb. These are standout totals for such modest calories.
Those figures place kidney near the top for nutrient density ounce for ounce when compared with standard muscle cuts. It’s a handy add-in when you want more B vitamins and minerals without a huge calorie load.
How Often To Put It On The Menu
There’s no one-size answer. Many eat organ cuts weekly or monthly as part of a mixed diet. Rotate among species, balance with vegetables, and keep portions moderate. People with gout may need to mind purines, and anyone with iron-loading conditions should track iron intake from all sources.
Smart Shopping And Storage
Ask your butcher for fresh delivery days. If a package sits in the fridge for more than two days, freeze it. Wrap tightly to avoid freezer burn; use within three months for the best texture.
Trimming Saves Time Later
Pre-trim before freezing. Split kidneys, strip the tough white core, and portion into cooking sizes. Label by species and date so you can compare flavor later.
Comparing Beef, Lamb, And Pork
Beef brings a mild taste and the most published macro profile near 99 calories per 100 grams with strong riboflavin and pantothenic acid. Lamb runs higher in protein and iron with that large B12 value. Pork sits close to beef on calories and protein and steers lean when trimmed.
Micronutrient Standouts (Per 100 G)
| Nutrient | Beef Kidney | Lamb Kidney |
|---|---|---|
| Vitamin B12 | ~27.5 mcg | ~78.9 mcg |
| Riboflavin (B2) | ~2.8 mg | ~2.1 mg |
| Selenium | ~141 mcg | ~219 mcg |
| Iron | ~4.6 mg | ~12.4 mg |
Safety Notes And Sensitivities
Cook to a safe internal temperature and use clean boards and knives to prevent cross-contamination. People on low-purine diets may need to limit portions. Those with hemochromatosis or other iron-loading issues should monitor intake from organ cuts. A registered dietitian can map kidney into a balanced plan that suits your goals.
Nutrient Density Without The Price Tag
Organ cuts tend to be budget-friendly compared with steaks or chops. A half-pound package can feed two to three people once trimmed and cooked with onions, mushrooms, and a splash of stock. The value case can be a neat way to bring more B vitamins and minerals to the plate without overspending.
Animal Organ Kidney Facts For Everyday Cooking
This section keeps the theme with phrasing that mirrors how many shoppers search. If you’re comparing choices, pick the animal that matches your flavor goal, then build the plate. Crisp onions and a quick pan sauce pair nicely with beef or pork. Lamb plays well with rosemary and thyme.
Simple Meal Ideas
- Flash-fried slices over mashed potatoes with pan gravy.
- Kidney and mushroom skewers with lemon and parsley.
- Hearty stew with beef cubes, diced kidney, carrots, and peas.
FAQ-Free Tips Readers Ask A Lot
Does Soaking Change Nutrition?
A short soak mostly affects flavor, not macros. Water pickup can nudge weights slightly, but protein and mineral density per gram of tissue stay in the same ballpark.
What About Cholesterol?
Values are high. Many readers still fit these cuts into a balanced plan by keeping portions modest and pairing with fiber-rich sides. Ask your clinician if you’re managing blood lipids.
Can You Freeze Cooked Leftovers?
Yes. Cool quickly, pack in shallow containers, and freeze for up to two months. Reheat gently to avoid toughness.
Bottom Line For Home Cooks
If you enjoy bold, savory plates and want more protein, B vitamins, selenium, and iron without a big calorie hit, kidney belongs in the rotation. Mind the trim, cook with care, and keep portions steady with the rest of your menu.