Once upon a time three meals a day was considered the foundation stone of healthy eating and snacking in between was strictly forbidden if you were watching your weight. But the very latest research tells us a very different story and snacking in between meals isn’t condemned anymore; in fact it’s highly recommended. Obviously snacking on a whole bar of chocolate and a family pack of crisps when you feel that mid afternoon slump isn’t going to do you any good at all but a few strategically timed, balanced snacks can help you get more nutrients, stop food cravings, increase your energy and even keep wrinkles away.

As far as weight loss is concerned the nutritional tide is really turning in favour of snacking between meals. This is because we now know that hanging on until lunch or supper puts your body into starvation mode. Your metabolism slows right down and encourages your body to hold onto fat stores and hinders attempts at weight loss. If, however, you make sure you eat every two or three hours your body doesn’t feel under threat from starvation and doesn’t cling to fat in the same way.

It’s not just your waistline that benefits from regular snacking, however, your brain does too. This is because your brain relies on a steady supply of energy in the form of glucose from the food you eat. If you skip meals or go for long periods as you would with a three meal a day diet plan your blood sugar levels start to fluctuate so your brain doesn’t get that steady supply. The result: you feel tired, forgetful and grumpy.

In addition, studies also show that fluctuating blood sugars can encourage the release of the stress hormones — adrenaline and cortisol — which can not only contribute to the likelihood of weight gain, particularly around the middle, but can also aggravate the symptoms of the menopause, such as hot flushes, mood swings, insomnia and memory loss and increase pre-menstrual symptoms.

Finally, skipping meals or not eating often enough can make you deficient in nutrients that affect how you age. This is because snacks are a convenient and quick way to add more nutrients into your diet. For example, a handful of nuts and seeds, something you may be unlikely to add to a main meal, is bursting with skin friendly antioxidant vitamin E and essential fatty acids. Snacking also allows you to increase your intake of unprocessed, raw foods like fresh fruit and vegetables, which often shed nutrients during the cooking process, especially the antioxidant, anti-ageing vitamin C.

How, what and when?

To reap all the benefits of snacking you need to make sure you eat something small, like an oatcake or some nuts and seeds, every three or so hours. For example, after breakfast you should aim for a mid morning snack at around 11 am and then after lunch you should aim for a mid afternoon snack at around 4 pm and then after supper you could also have a very light snack just before bedtime, if you wake up in the middle of the night, so that everything adds up to three meals a day with two to three snacks in between.

This regular intake of calories and nutrients beats hunger pangs and mood swings because your blood sugar levels stay even and this sends a message to your brain that your body is not under stress and that it can keep revving your metabolism up and use your old fat stores for energy instead of clinging onto it.

Do make sure you pay attention to portion sizes though. Snacking is great for weight loss but not if you end up eating more than you normally do. If you add in snacks you do need to adjust your meal size accordingly. To do this, eat the amount of food you usually do, but spread it over five to six smaller meals and snacks instead.

Your snacks could be something like a handful of nuts and raisins, a small piece of fruit like a banana or an apple, or an oat cake spread with hummous. Remember, your meals should fit on a regular sized dinner plate and should not be piled high and your snacks should fit easily into the palm of your hand.

Your snack prescription:

The snack suggestions below can help if you want to:

• Fight Fatigue: One of the most common symptoms of blood sugar imbalance is fatigue. Eating little and often will help keep your blood sugar and your energy levels steady. Don’t forget to add some protein to your snacks though as protein slows down the rate at which your stomach empties and helps keep your blood sugar levels on an even keel. Try an organic natural yogurt with a palmful of berries and a table spoon of mixed nuts and seeds; a boiled egg with a slice of wholemeal bread or hummous with crudités.
• Lower high cholesterol: A study in the Journal of the American Heart Association found that eating a few ounces of oats a day could lower cholesterol by 16 per cent in three months so snack on a couple of oat cakes or a small bowl of porridge made from organic soya or rice milk.
• Beat Insomnia: Low blood sugar could be one of the reasons why you find it hard to get to sleep or wake up regularly in the night so try to have a snack at least 40 minutes before you go to bed. Aim for foods high in tryptophan, an amino acid that encourages sleep. Good sources are oats, peanuts and sunflower seeds so try a small bowl of oat porridge, a slice of wholemeal toast with peanut butter or a handful of sunflower seeds with a cup of camomile tea.
• Beat Memory loss/poor concentration: Study after study has confirmed the beneficial effect of omega 3 rich oily fish, like tuna, mackerel or salmon and nuts and seeds on brain function. To stay alert for longer aim for a few pieces of oily fish or a selection of sunflower, sesame or linseeds for your mid morning or mid afternoon snack when your concentration is most likely to be at its lowest ebb.
• Beat Mood swings: Snacking on low GI complex carbo-hydrates that release a steady supply of glucose to your brain is a great way to keep your blood sugar levels and your mood stable so try some mixed bean salad or a delicious bowl of comforting oat porridge with a spoon of honey or maple syrup for sweetness.
• Protect yourself against osteoporosis: To keep your bones healthy you need a steady supply of calcium, antioxidants and vitamins; so try a handful of raspberries, blueberries or strawberries and top them with a few tablespoons of organic natural yogurt and a teaspoon of ground linseeds (flaxseeds) to give your bones and joints a boost.
• Lose weight: One of the best ways to shift weight is to boost your nutrient intake so your food is digested more efficiently and to keep your blood sugar levels stable because weight gain is often a symptom of blood sugar imbalances. Snacking is the perfect way to achieve both these objectives, especially if you snack on negative calorie foods like broccoli, carrots, courgettes and celery. These foods are negative calorie foods because they use up more calories in digestion than they provide. To make them more interesting dip them into hummous or guacamole.
• Fight wrinkles: The secret of healthy skin is essential fat which keeps it hydrated and keeps wrinkles and dry skin at bay. To keep your skin glowing, try snacking on four or five olives or whole almonds (both rich in essential fats) with a piece of fruit.
• Beat symptoms of menopause: Foods rich in calming phytoestrogens will help balance your hormones and by so doing ease menopause related symptoms such as hot flushes, poor concentration and bloating. You could snack on a tablespoon of flaxseeds (linseeds) a day with some anti-ageing berries. Remember you don’t always have to eat soya; other legumes, such as chickpeas and lentils, are good sources of phytoestrogens too.

If you find yourself nodding off during the day or constantly yawning during a meeting, study session or conversation, your body could be under siege from hidden energy sappers. Fight back with the following fatigue beating tips:

Energy sapper 1: Your phone

Sleeplessness, headaches, fatigue and dizziness can all be symptoms of electrical sensitivity. Electrical sensitivity affects about 35 per cent of the population. It interferes with your body’s natural rhythms. Cordless phones may be the worst as we tend to keep them beside the bed, where we receive electrical waves from the base. Other risk areas include: using the hairdryer over 10 minutes; keeping your digital clock by the bed and sitting too close and too long in front of a computer screen.

Energy solution:

Switch to an analogue clock and a flat screen monitor and keep your wireless network router in a different room to your study or bedroom. Also if you’re working in front of a computer screen for long periods make sure you take a few minutes break at least every half an hour.

Energy sapper 2: Anaemia

Around four million women in the UK suffer from anaemia, caused by lack of iron. The symptoms include tiredness, dizziness and a racing heart. Your body needs iron to produce red blood cells which carry oxygen around your body. Without it you’ll feel lethargic, no matter how much sleep you get. It is better not to take iron unless you know that you are anaemic and then to re-test it to check that your levels are back to normal.

Energy solution:

If you suffer from tiredness and heavy periods ask your doctor for a blood test for VWD (Von Willebrand’s disease) which affects around 300,000 women in the UK and is caused by blood not able to clot properly. Your doctor also needs to test your iron levels. To reduce the risk of anaemia, make sure you eat a balanced diet with plenty of green vegetables.

Energy sapper 3: Undiagnosed diabetes

According to the healthcare commission 500,000 UK women are unaware that they have diabetes. This is partly to do with high sugar diets, obesity and sedentary lifestyles. Diabetes occurs when the amount of glucose (sugar) in your blood is too high and your body is unable to convert it into energy because there is not enough insulin or the insulin produced isn’t working properly. The body then breaks down its stores of fat and protein to try to release more glucose and the problem gets worse and this is why people with untreated diabetes feel tired and lose weight. Other symptoms include urinating often and extreme thirst.

Energy solution:

Ask your doctor for a blood test. If the test is negative for diabetes then your tiredness might be caused by your blood sugar levels. Cravings for starchy, sweet or fatty foods before your period can mean you have a blood sugar imbalance. To keep your blood sugar levels steady avoid sugar and refined processed foods as well as juices, cigarettes and caffeine. Eat every three hours and load up on low glycaemic foods such as seafood, eggs, hummous, green vegetables and fruits such as pears, grapes and apples. Replace pasta with basmati rice and have porridge for breakfast instead of packaged cereals.

Energy sapper 4: Your lunch

One in 10 people in the UK have a food intolerance which can cause lethargy and irritability. Food intolerances trigger an immune response which uses up a huge amount of energy and the most common food culprits are wheat, dairy and sugar. So if your lunch was a cheese sandwich on whole wheat bread with a bar of chocolate your body may be using up energy by simply digesting rather than converting your lunch into energy.

Energy solution:

If you suspect that you have a food intolerance keep a food diary for a few weeks and see if there is a connection between your tiredness and a specific food. Try eliminating that food and see if it makes a difference. Alternatively you can have a blood test to check for food allergies.

Energy sapper 5: Under-active thyroid

Your thyroid works by producing the hormone thyroxine which controls metabolism and regulates energy levels. If your thyroid produces too little you feel tired. You might gain weight, your skin and hair will feel dry and you may also feel depressed.

Energy solution:

Ask your doctor for a thyroid test. If you have an under-active thyroid he or she will prescribe medication to boost your hormone levels. You should also eat a diet high in fruit, vegetables, fish and seaweed and avoid alcohol and cigarettes.

Energy sapper 6: Your bedroom

Almost 40 per cent of the population suffers from some form of insomnia. A disrupted night’s sleep affects you physically and mentally. In the long run you end up with a massive sleep debt that your body can’t repay no matter how much sleep you get.

Energy solution:

To increase your chances of a good night’s sleep make sure your bedroom is a calm and relaxing place and your mattress is comfortable. Use your bed for sleeping and sex only so you associate it with rest and pleasure only. Block out noise and light, as light will impair the production of the sleep hormone, melatonin, and sleep in a well-ventilated but not cold room (around 13 -18° C, 55-65° F) as body temperature falls at night to promote feelings of sleepiness.

Energy sapper 7: Vitamin B12 deficiency

If you feel tired and are eating a healthy diet, you may be deficient in vitamin B12. B12 helps to carry oxygen around the body so it is a must for energy.

Energy solution:

You may want to ask your doctor for a blood test to check your levels of B12. Injections can then be administered by your doctor if needed. Vegans can be more at risk of a vitamin B12 deficiency so testing is important.

Energy sapper 8: Your work out

Not how but when you work out could be draining your energy. You should not exercise intensely just before bed as this will make your adrenaline, heart and respiratory rates pump and you won’t be able to sleep. Also if your exercise routine is too intense, long or vigorous for your current level of fitness, instead of energising you as moderate to mild exercise should, it will be draining you.

Energy solution:

Do energy forming exercises such as running or aerobics in the morning and focus on milder activities later in the evening. Try a walk at the end of the day or a yoga session to calm your mind and stretch your muscles. If your daily exercise routine is exhausting adjust it because the aim of exercise is to boost your energy not drain it. Don’t go the other way though and cut out exercise altogether as no exercise will trap you in a vicious cycle of tiredness. Around 30 minutes of light exercise a day can help boost energy levels significantly.

Energy sapper 9: You’re dehydrated

Dehydration occurs when you lose more fluid than you take in and your body doesn’t have enough water and other fluids to carry out its normal functions. Common causes of dehydration include intense bouts of diarrhoea, vomiting, fever or excessive sweating. Inadequate intake of water during hot weather or exercise also may deplete your body’s water stores. Mild dehydration can cause symptoms such as weakness, dizziness and fatigue.

Energy solution:

You can usually reverse mild to moderate dehydration by increasing your intake of fluids, but severe cases need immediate medical treatment. The safest approach is not to become dehydrated in the first place. Aim for 6 to 8 glasses of water or herb teas a day and don’t wait until you get thirsty to drink. You can do that by monitoring your fluid loss during hot weather, illness or exercise, and drinking enough liquids to replace what you lose. Also reduce your alcohol, tea and coffee intake as these are dehydrating.

Energy sapper 10: You’re depressed

As well as loss of libido, weight gain and lack of motivation, one of the most common side effects of depression is tiredness.

Energy solution:

As well as eating healthily and getting the mood boosting effects of regular exercise preferably in the fresh air, you may want to try some cognitive behavioural therapy (CBT). CBT is recognised as effective in helping to change the patterns of your mind so that you can control stress and depression. The herb St John’s wort is also effective for mild to moderate depression.

1. Blueberries: Sweet blueberries are bursting with antioxidants and phytochemicals that can help sharpen your brain.
2. Leafy greens: Folate and vitamin B6, found in broccoli and kale, help convert tryptophan into serotonin, a brain chemical that boosts your mood and alertness.
3. Salmon, Sardines, and Herring: Oily fish is full of brain boosting omega-3 fatty acids so granny was right: oily fish is the best brain food. In addition to cold water fish (mackerel, salmon, herrings and sardines) good sources of omega 3 for vegetarians include pumpkin seeds, linseeds (flaxseeds) and walnuts.
4. Grape Juice: Drinking red wine in moderation may boost your brain function but since alcohol in excess can slow down the brain’s ability to function properly, antioxidant rich grape juice may be a smarter beverage choice.
5. Whole grains like brown rice: One of the best things you can do to improve your intake of brain boosting nutrients is to switch to brown rice. It’s packed with protein, vitamins and minerals your brain loves.
6. Cranberries: These tasty berries are particularly good for your brain because they are bursting with brain boosting antioxidants. Don’t use cranberry juice as it is usually loaded with sugar.
7. Curcumin: This spice that gives curry its yellow colour can help protect your brain against disease and mental decline.
8. Olive oil: Rich in antioxidants for healthy brain function. The extra-virgin organic variety is best because the oil is produced naturally without chemical treatment.
9. Garlic: This pungent herb is a powerful antioxidant that can also help shake off stress-induced colds and infections. Raw, crushed garlic is best; cooked garlic is less powerful but still benefits circulation. If you prefer to take it in supplement form I use a special garlic in the clinic called Aged Garlic which has been used in over 550 clinic trials for lowering cholesterol and homocysteine, liver detoxification, anti-candidia, immune-boosting and anti-stress. Call 0845 8800915 for more information.
10. Brazil nuts: Brazil nuts are the highest known food source of selenium (one Brazil nut contains 50mcg — 100mcg of selenium, depending on the selenium content of the soil in which it is grown). Selenium, a powerful antioxidant, is concentrated in the brain and is an important nutrient for brain function.