The problem with fats
There are several different types of fat; some are more healthy than others. The three main types of fat are:
The basic building blocks of fat are called fatty acids. Each type of fat is made up of different fatty acids.
Most adults in the UK eat too much fat – especially saturated fat. Too much saturated fat increases our risk of heart disease. All types of fat can contribute to an unhealthy weight gain. This is because fats are a very concentrated source of energy. They also tend to make foods taste good.
Saturated fats
Saturated fats are found mainly in foods that come directly, or indirectly, from animals – lard, butter, cream, fatty meat, hard cheese, and foods made using animal fats, like biscuits and ready-made pastry. Coconut oil, palm oil and ghee are also rich in saturated fats – as is chocolate. We should all eat a lot less saturated fat.
Meat and cheese, however, supply other valuable nutrients as well as containing saturated fat. The way around this dilemma is to try to choose lean cuts of meat (we only need a little, remember). It is also a good idea to trim away visible fat, and avoid using extra fat when cooking the meat. If you eat a lot of cheese, you may like to choose a low-fat variety. And, if you enjoy the taste of butter, try a low-fat, ‘buttery’ spread instead. Semi-skimmed milk (or normal milk with the cream poured off) contains a lot less fat than whole milk – and is just as nutritious.
Mono and poly: the unsaturated fats
Monounsaturated fats are found in many foods, including vegetable oil, olive oil, soft margarines, meat, fish, avocado, eggs and peanuts. Check the ‘nutritional information’ label on packaged food to see what type of fat each food contains.
Monounsaturated and polyunsaturated fats are better for you than saturated fats. Polyunsaturated fats tend to be liquid at room temperature – in contrast to saturated fats which are usually hard (think of butter, lard, fat on meat and so on). Polyunsaturated fats are found in soya and sunflower cooking oils, sunflower margarine, oily fish, nuts and seeds.
Essential fatty acids
Polyunsaturated fats are important because they contain essential fatty acids. These special fatty acids are called ‘essential’ because (unlike other fatty acids) they cannot be made in our bodies – we have to get them from our food. The essential fatty acids are needed for normal brain development and the production of some of the hormones necessary for a healthy pregnancy. (Hormones are special chemicals working in our bodies.)
There are two essential fatty acids: linoleic acid and linolenic acid. Linoleic acid is found mainly in nuts, and in plant oils such as sunflower, soya or corn oil. Good sources of the other essential fatty acid – linolenic acid – are oily fish (tinned or fresh sardines, mackerel and salmon), eggs and lean meat.
It is important to take in a balance of the two fatty acids. Unless you are on a very low-fat diet, you are probably taking enough linoleic acid, but most of us would benefit from eating more oily fish and so increasing our intake of the second essential fatty acid, linolenic acid. Scientific research suggests that women who eat more oily fish tend to have longer pregnancies and bigger babies. There may also be a link between taking fish oil during pregnancy and a reduction in the risk of pre-eclampsia, a serious disorder of pregnancy.
Trans fats
Finally, we need to mention a special group of fatty acids called ‘trans fats’. You may notice on some low-fat spreads a label stating that ‘This product contains virtually no trans fats’. These products are good ones to choose because high intakes of trans fats have been linked with heart disease.
Trans fats are found in polyunsaturated fats that have been artificially processed in some way. For example, reheating vegetable oil changes the (healthy) fatty acids in that oil to (unhealthy) trans fats. A similar thing happens when liquid fats are hardened to use in factory-produced pastry and hard margarine. Butter, cream and cream cheese also contain some trans fats. The words ‘hydrogenated vegetable oil (or fat)’ on food labels means that the food probably contains trans fats.
We talk more about avoiding the unhealthy types of fats in Chapter 8.
What’s wrong with sugar?
There are two main types of sugar:
The main problem with added sugar is that, although it gives us an energy boost, it contains no other nutrients at all. In fact, because our bodies need to work to digest sugar, nutrients from other foods eaten at the same time are wasted. Too much added sugar actually drains nutrients from our bodies.
Eating sugary foods fills us up – so we can’t eat other, healthier foods. Too much added sugar contributes to tooth decay and to an unhealthy weight gain. Sugary foods don’t satisfy us for long – so we soon feel hungry again. Finally, sugary foods – cakes, chocolates and sweets – tend to be expensive. So, bad food value all round!
The problem is that many of us really like the taste of sugar. Some women find that they want to eat more sugary foods at certain times of their menstrual cycle – or at different stages of pregnancy. It can be very hard saying ‘no’ to a tube of sweets or bar of chocolate at times like this. Try to think instead about the other type of sugar – the natural sugar found in fruit or in milk. Foods containing this kind of sugar are rich in many nutrients. When you crave a sugary snack, reach for things like kiwi fruit, bananas and cherries, dried fruit, a slice of fresh bread, a couple of digestive biscuits or some unsalted nuts.
We talk more about cutting down on sugar and sugary foods in Chapter 8.
Last, but not least – water!
We all need to drink plenty of water and other fluids. A good intake of liquid throughout the day helps with the smooth running of virtually every part of our body. When we drink enough water our digestion works better, our joints ache less and our skin is softer. Drinking plenty of water can relieve and help prevent many ailments – headaches, constipation, urine infections.
Drinking more while you are pregnant may seem odd, because many women already find they need to go to the toilet more often, especially at night. But there is a reason for this. When you are pregnant, your body contains extra blood and other fluids, to meet the needs of your baby – and your kidneys need to work harder to cope with the additional demands. It is important that you drink plenty to meet your baby’s needs, and to keep yourself in good health. Cutting back on what you drink to avoid getting up to go to the toilet at night can be harmful. Pregnant