Chicken liver and giblets: buying, storing and cooking them safely

Almost every whole chicken carries a small bag holding the liver, heart and gizzard, and every Saudi market sells packs of them on their own. Liver in particular is a staple in many kitchens here: fried with lemon and pepper, grilled over charcoal, or folded into a rice stuffing. Gizzards are boiled, seasoned and served alongside dinner. The odd thing is that most of the advice we pass around about chicken concerns breasts and thighs, while the organs that need more attention travel with no clear rules at all. This lesson gives them their rules: a buying rule, a storage rule shorter than most people expect, a cooking rule that differs fundamentally from the one for a steak, and a nutrition rule that concerns one specific group of people.

Why organ meats are a different case#

When we talk about contamination in raw chicken, the usual mental picture is bacteria sitting on the surface, which makes it seem reasonable that high heat on the face of the piece is enough. With liver, that picture collapses. The UK Food Standards Agency warns that Campylobacter can be present throughout the liver, not just on its surface, and states plainly that chicken liver should not be treated like a piece of steak: it must be cooked all the way through. The reason is that the liver is a filtering organ reached by bacteria through the blood and the bile ducts, so they settle in its internal tissue rather than only on its outside.

The laboratory work says the same. A 2024 study in Poultry Science on thermal inactivation kinetics in chicken livers states that both Salmonella and Campylobacter are found on the surface and in the internal tissue of chicken livers. The researchers measured how each resists heat and found Salmonella three to four times more stubborn than Campylobacter at every temperature tested: at 55 °C, cutting Salmonella tenfold took about nine minutes, while Campylobacter took just over two. Those numbers explain why a fast minute over high heat is not enough if the centre of the piece stays cool.

This is not an argument between laboratories either. Britain recorded a genuine wave of outbreaks caused by undercooked chicken liver: of fifteen outbreaks linked to chicken liver products between 2005 and 2009, nine happened in 2009 alone, and five more followed in the first half of 2010 — mostly in restaurants and hotels serving pâté or parfait prepared on site. The common factor in those incidents was a professional cook who believed the pink at the centre was an intended stage of doneness rather than a sign of undercooking.

Buying: what to check before it goes in the trolley#

Organ meats spoil faster than breast and thigh, because their moisture and blood content is higher and their tissue is looser. Checking the pack at purchase is therefore not excessive care — it matters more than it does with a pack of breasts, and the difference between a sound pack and one past its useful life shows to the eye and the nose long before it shows in the pan.

• Colour: sound liver is a glossy, even reddish-brown. Avoid pieces that look pale, greyish, or carry dark green patches — a green patch is the mark of a burst gall bladder and will leave a bitterness that cooking does not remove.
• Texture and liquid: the pieces should be firm rather than mushy, and the liquid at the bottom of the pack should be sparse and clear. Thick, plentiful or foamy liquid means the pack is past its time or has ridden a temperature swing.
• Smell: a faint metallic note is normal in liver. Anything sour or sharp is an immediate no.
• Display temperature: take a pack from deep inside the chilled cabinet rather than from its top edge, and make sure it sits below the load line marked inside the unit.
• Date: giblets are not something to park in the fridge for days, so buy them knowing when you will cook them, or plan to freeze them as soon as you get home.

Make the giblet pack the last thing you put in the trolley, bag it separately from vegetables and bread, and end the shopping trip with it. In a Riyadh summer, an extra half hour in the car is enough to cost the pack a real share of the life it would have had in your fridge.

Storage: a day or two, not a week#

Here is the number that surprises most people. The official cold-storage charts published by the US food-safety agencies give giblets a clearly shorter refrigerated life than ordinary raw chicken: one to two days in the fridge, and three to four months in the freezer. The pack you bought today will not wait for you until the weekend, and if you are not cooking it within two days, its place is the freezer rather than a fridge shelf.

• Fridge at 4 °C or below and freezer at −18 °C, measured with a thermometer inside the appliance rather than judged by hand.
• Keep the pack on the coldest shelf — usually the bottom one — and inside a dish that stops liquid dripping onto anything below.
• To freeze: split it into meal-sized bags, press the air out, and write the date. One large block forces you later to thaw more than you need.
• Thaw in the fridge, in cold water changed regularly, or in the microwave with cooking immediately afterwards — never on the kitchen counter.
• What thawed in the fridge can be cooked within a day; what thawed in water or the microwave is cooked straight away; and nothing that thawed uncooked is refrozen.

Preparing them without spreading contamination#

Organ meats are wet and slippery, which means splash and liquid travel off them more easily than off a breast fillet. The step many people believe is cleaning — rinsing liver under the tap — is in practice the worst thing to do at this stage: water does not remove bacteria from inside the tissue, but it does scatter them across the sink, the mixer tap and the surrounding surfaces.

1. Empty the pack into a colander or dish held over the sink rather than into the sink itself, and do not rinse the pieces under running water.
2. Set out a board and knife dedicated to raw food, kept entirely apart from any board you use for salad or bread.
3. For liver: remove the white connective tissue and any part carrying a green stain from the gall bladder, and leave the remaining pieces as whole as you can so doneness is easier to control.
4. For gizzards: open them, strip out the tough yellow inner lining and any grit left behind — that is the part that leaves a sandy taste if it stays.
5. When you finish: wash your hands with soap for twenty seconds, then clean the board, knife, sink, tap and the fridge handle if you touched it while working.
6. Never return cooked pieces to the plate or tray that held them raw — the same rule the Saudi Food and Drug Authority stresses for avoiding cross-contamination.

Cooking: the number that settles it#

The general poultry rule is the same in Saudi Arabia and elsewhere: 74 °C at the deepest point, and it applies to liver, gizzard and heart exactly as it applies to breast. The British wording expresses the same idea differently — a core of 70 °C held for two minutes, or the equivalent. In practice the two say one thing: the heat has to reach the centre and stay there, not touch the surface and leave.

The Poultry Science study cited above puts precise laboratory backing under that rule: heating livers to an internal temperature between 70.0 and 73.9 °C is enough for a seven-log reduction in the pathogens — the accepted safety target — and validation at 73.9 °C achieved it immediately, leaving the bacteria undetectable. So 74 °C is not an inflated safety margin; it is the point where safety and a liver that is still tender meet.

Because liver loses its tenderness quickly past that point, the accurate approach is not to cook it longer but to measure it. Insert the thermometer into the thickest piece from the side so the probe reaches the centre, rather than from above into something thin. With no thermometer, the fallback is to cut the liver into similar-sized pieces and cook until the raw red colour is entirely gone and no bloody liquid runs out under pressure. Gizzards are a different story: their tissue is dense muscle, and they need a long gentle simmer before seasoning or frying — safe temperature arrives early in them, and it is tenderness that takes the time.

The classic mistake with chicken liver is a fast sear over very high heat: the face browns within a minute while the centre stays raw. Lower the flame a little and give it a few more minutes — a browned surface is no evidence of what is happening at the centre.

Nutrition: why liver really is exceptional#

Liver is not merely a cheap part of the bird; it is among the most nutrient-dense foods there is. The USDA food-composition database gives each 100 g of raw chicken liver roughly 17 g of protein, 9 mg of iron and 16.6 µg of vitamin B12 — many times an adult's daily requirement. Alongside those come about 3,300 µg of vitamin A as retinol activity equivalents, and 345 mg of cholesterol.

That profile explains why liver is traditionally described as food for anyone short of iron, since its iron is the readily absorbed heme form and its B12 supports blood-cell formation and the nervous system. Gizzards and hearts give good protein and reasonable iron at far lower density than liver, which is why they can appear more often in the week without the caveats liver carries.

Who should cut back on liver, and why#

That same density is the one caveat that matters, and its cause is vitamin A. A hundred grams of chicken liver carries several times the daily requirement of it, and the vitamin is stored in the body rather than flushed out in water the way water-soluble vitamins are. UK health guidance therefore sets out three practical points: the adult daily need is about 700 µg for men and 600 µg for women; eating liver or liver pâté more than once a week may mean getting too much vitamin A; and averaging more than 1,500 µg a day over many years may affect the bones, making them more likely to fracture later in life.

The group covered by the strongest warning is pregnant women. The standing health advice is explicit: if you are pregnant, avoid eating liver or liver products such as liver pâté. The reason is that the form of vitamin A in liver is retinol, and excess retinol in the early months of pregnancy is linked to risks to the developing baby. The alternative is not to go without vitamin A but to change its source to beta-carotene in carrots, sweet potato and orange vegetables, since the body converts only what it needs from it. The same caution applies during pregnancy to supplements containing retinol or fish-liver oil.

Outside those two cases there is no reason to avoid liver. Once a week in a moderate portion delivers real benefit without approaching the limits above. And anyone with a specific medical situation — persistently high cholesterol markers, or gout — should take the decision with their doctor rather than from a general rule in an article.

The lesson in six steps#

1. Buy giblets at the end of the shop, check colour, smell and liquid, and avoid green patches on liver.
2. Cook them within one to two days of buying, or freeze them on arrival in meal-sized bags.
3. Do not rinse them under the tap; use a board and knife kept for raw food, and clean everything they touched afterwards.
4. Trim the white tissue and any gall stain from liver, and the yellow lining from gizzards.
5. Cook to 74 °C at the centre over medium rather than high heat, and verify with a thermometer rather than by surface colour.
6. Keep liver to once a week, avoid it entirely in pregnancy, and switch the vitamin A source to orange vegetables when needed.