Gallstones are common. They cause no symptoms in two out of three people who have them. They sometimes cause problems such as pain, jaundice, pancreatitis, and gallbladder inflammation. Surgery is the usual treatment for gallstones that cause symptoms.
Gallstones occur when bile, which is normally fluid, forms stones in your gallbladder. This is the organ that sits beneath the liver. Most commonly, gallstones contain lumps of fatty (cholesterol-like) material that has solidified and hardened. Sometimes bile pigments or calcium deposits form gallstones. Sometimes just a few small stones are formed; sometimes a great many. Occasionally, just one large stone is formed.
About one in three women, and one in six men, form gallstones at some stage in their lives. Gallstones become more common with increasing age. The risk of forming gallstones increases with:
- Rapid weight loss.
- Having a close relative with gallstones.
- Taking certain medicines such as the contraceptive pill.
Being vegetarian and drinking a moderate amount of alcohol may reduce the risk of forming gallstones.
The role of the gallbladder in digestion
The gallbladder plays a part in the digestion of food. It stores and releases bile into the small intestine when food enters. This helps with the digestion of food because the gallbladder contains bile salts (and other substances) that break down fat. The bile duct where bile is released from can become blocked by gallstones. This may cause symptoms such as pain, bloating, a feeling of sickness (nausea), and being sick (vomiting). This is because more bile is released when foods high in fat are eaten. The stone may cause a blockage and make it difficult for the bile to be released from the bile duct.
Dietary changes to help with symptoms of gallstones
There is no specific diet for treating symptoms of gallstones. However, eating a healthy balanced diet that is naturally low in fat may help to reduce symptoms. If you are overweight, losing weight will be beneficial. However, it is important to do this gradually, as rapid weight loss has been associated with the development of gallstones. A safe weight loss of 1-2 lbs (0.5 to 1 kg) per week is recommended.
A healthy balanced diet consists of:
- Plenty of fruit and vegetables. Aim to have at least five portions each day.
- Plenty of starchy carbohydrates. Examples include bread, rice, cereals, pasta, potatoes, chapattis and plantain. Choose wholegrain varieties when possible.
- Some milk and dairy products (2-3 portions per day). Choose low-fat dairy products.
- Some meat, fish, eggs and alternatives such as beans and pulses.
- Limited amounts of foods high in fats and sugars. Limit saturated fat that is found in animal products, such as butter, ghee, cheese, meat, cakes, biscuits and pastries. Replace these with unsaturated fats found in vegetable oils, such as sunflower, rapeseed and olive oil, avocados, nuts and seeds.
- Make sure your diet is high in fibre. This can be found in beans, pulses, fruit and vegetables, oats, and wholewheat products, such as bread, pasta and rice.
- Drink plenty of fluid - at least two litres daily, such as water or herbal teas.
Try not to eat too much fat at one mealtime. It might be helpful to have smaller, frequent meals. Some people find that specific foods are the triggers for symptoms. Keep a food and symptom diary to identify trigger foods. Avoid these foods for a two-week trial period and note any improvements in symptoms.
Cutting down on fat
A high-fat diet and fatty foods can sometimes cause discomfort and painful symptoms. They may also cause steatorrhoea (fatty stools), which are oily, pale and smelly. Steatorrhoea is a sign that fat is not being digested properly.
Here are some ways to cut down on fat in the diet.
|High-fat foods||Lower-fat alternatives|
|Butter, lard, ghee, oils, spreads.|
Lower-fat/light spreads, oil sprays for cooking, jam, honey.
Whole milk, cream, full-fat yoghurts.
Skimmed or semi-skimmed milk, half-fat crème fraîche, low-fat evaporated milk, low-fat or fat-free yoghurt.
Full-fat cheese, such as Cheddar, Brie and Stilton.
Cottage cheese, light soft cheeses such as Philadelphia® or Dairylea Light®, quark, reduced-fat Cheddar cheese or naturally lower-fat cheeses such as mozzarella and ricotta (matchbox-sized portion).
|Snacks, such as cakes, biscuits, pastries, crisps and nuts.||Toasted teacakes, low-fat popcorn, fruit and vegetables, dried fruit, meringues, rice cakes, Rich Tea® biscuits, low-fat crisps such as Quavers® or Skips®.|
|Puddings, such as pies, ice cream and custards.||Jelly, sugar-free jelly, low-fat custard, rice pudding made with semi-skimmed milk, sorbet, tinned or stewed fruit, low-fat yoghurts|
|Sauces and dressings, such as mayonnaise, creamy sauces.||Light mayonaisse, vinaigrettes, mustard, lemon juice, fat-free salad dressings, tomato-based sauces (some can contain oil), salsa, balsamic dressing.|
|Meats and processed meats, such as sausages, salami, corned beef, bacon, gammon, pork, lamb, beef mince, beefburgers, meat pies, fish tinned in oil.||Chicken, turkey, lean ham, lean or extra lean beef mince, turkey mince, red meat with visible fat cut off, and white fish, such as cod, haddock, pollock, and fish tinned in brine or water.|
Note: many processed foods that are low in fat can contain high amounts of sugar. Check the labels for high-sugar products and try to keep these to a minimum. A product that is high in sugar contains more than 10 g of sugar per 100 g.
Reduced-fat, light and low-fat are not the same thing. If a product is low-fat, this means that the product contains 3 g or fewer of fat per 100 g and is actually low in fat. A reduced-fat product does not mean that the product is necessarily low in fat. It means that the product contains 25% less fat than the original product, which is usually a very high-fat product, such as mayonnaise or Cheddar cheese. This is a similar for 'light' products, which contain about a third fewer calories than the original product, or 50% less fat. Therefore, keep these to a minimum when choosing reduced-fat or lighter products.
Practical tips to cut down on fat
Just by adopting some healthy habits can really impact on the amount of fat you consume. Here are some tips you can use during cooking and food preparation.
- Try to avoid processed foods and cook from scratch when possible. This will help to have control over how much fat goes into your food.
- Check labels for high-fat products. A product that is high in fat contains 17.5 g or more of fat per 100 g. Try to avoid foods with red colour coding on the label for fat. Look for foods that contain 3 g of fat or fewer.
- Bulk out meals with vegetables and pulses. For example, a bolognese could be made with half the amount of meat by adding kidney beans and mushrooms.
- Use oil spray when cooking, or wipe off extra oil using a paper towel.
- Measure your oil when cooking, rather than pouring it. A good measure is about one teaspoon per person.
- Try to use fat/oil in food only when it is absolutely necessary.
- If you are cooking meat that is sticking to the pan, a small drop of water may help rather than adding more oil.
- Make your own dressings using low-fat yoghurt, lemon/lime juice and herbs.
- Remove all visible fat and skin from meat, and choose leaner cuts of meat.
- Skim fat off the top of casseroles and stews.
- Try not to fry food. Bake, steam, boil, grill or roast on a drip tray instead.
Dr Hayley Willacy