Some
food products claim to lower cholesterol in the blood. Do
they work?
There is evidence that foods containing certain added ingredients,
such as plant sterols and stanols, can reduce levels of cholesterol
in the blood. But there isn’t enough evidence to say
what the long-term effects of eating these products might
be.
If your doctor has told you that you have high cholesterol,
you can help to lower it by changing your diet, without eating
special products.
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Cut
down on foods that are high in saturated fat such as
biscuits, cakes, pastries, meat pies, sausages, hard
cheese, cream, butter and foods containing coconut or
palm oil. This is because eating too much saturated
fat can raise cholesterol levels.
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Choose
foods that are rich in unsaturated fats instead, such
as oily fish, avocados and sunflower, rapeseed and olive
oils. Unsaturated fats can help to lower cholesterol.
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Like
saturated fats, trans fats can raise cholesterol levels.
Trans fats are found in foods that contain hydrogenated
fats, including some types of biscuits, cakes, fast
food, pastry, margarine and spreads.
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And
don’t forget that we should also reduce the total
amount of fat we eat. So try microwaving, steaming,
poaching, boiling or grilling, instead of roasting or
frying; choose lean cuts of meat and go for low-fat
varieties of dairy products and spreads.
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You
can eat plenty of starchy foods, such as bread, pasta
and rice, as well as fruit and vegetables – aim
for five portions of a variety of types every day.
Regular physical activity, such as brisk walking, swimming
or cycling, can also help to improve your cholesterol
levels.
I’ve heard that glucosamine sulphate is good
for joints. Is this true?
Glucosamine sulphate supplements are recommended by
some GPs in the UK for people who have osteoarthritis,
a condition that affects the joints. This is because
there is some evidence that glucosamine sulphate can
help reduce inflammation and pain, and help with joint
movement.
This particular type of glucosamine is recommended because
this is the kind that has been used in more than 90%
of studies investigating the effect of glucosamine on
osteoarthritis. Some people think that glucosamine sulphate
can also help prevent osteoarthritis, but at the moment
there isn’t reliable evidence to support this.
Some people believe that taking glucosamine sulphate
supplements will help their joints when they’re
exercising. But, even though there have been claims
that glucosamine sulphate can help reduce the pain of
injury, there is little evidence to support this for
people who don’t have osteoarthritis.
If you’re taking part in a sport or another type
of physical exercise, it’s a good idea to ask
a qualified sports-training professional about how you
can exercise in a safe way that will help prevent injury
and soreness.
Are there specific health benefits from eating soya
or taking phytoestrogen food supplements?
Soya is a good source of protein and it’s fine
for people to eat it as part of a healthy balanced diet.
Soya also contains phytoestrogens. These are compounds,
found naturally in some plants, which may mimic or block
the action of the human hormone, oestrogen. But they
have a much weaker effect in the body than oestrogen.
Phytoestrogens can also be found in other plant foods,
including linseed (also called flaxseed).
Some people have claimed that foods rich in phytoestrogens
are particularly good for health and that eating these
foods could prevent or improve conditions related to
levels of hormones in the body, such as symptoms of
the menopause, osteoporosis, heart disease, and breast
and prostate cancer. Some fortified foods and supplements
have been developed with high levels of phytoestrogens
in them.
However, even though there has been extensive scientific
research to find out whether phytoestrogens are good
for our health, there is little decisive evidence to
show that they are.
Menopause
Some people have suggested that phytoestrogens could
be an alternative to hormone replacement therapy (HRT),
to help women experiencing symptoms of the menopause
such as hot flushes. However, the scientific studies
that have been conducted so far have produced conflicting
results and they don’t conclusively prove that
phytoestrogens would be helpful in this way.
Osteoporosis
Some studies suggest that phytoestrogens may have a
positive effect on osteoporosis by maintaining bone
density during the menopause. However, women would need
to take high doses of phytoestrogens for a long time
(for example, a year or more) to have even a small effect
on bone density. Therefore, it isn’t likely that
phytoestrogens can provide an effective treatment for
osteoporosis.
Heart disease
Having high cholesterol increases the chances of developing
coronary heart disease. There is convincing evidence
that eating soya, as part of a healthy balanced diet
that is low in fat, may help to lower cholesterol levels
in the blood. However, the evidence suggests that this
benefit from eating soya may be due to a number of components
soya contains, not just phytoestrogens.
Cancer
Eating some soya products may help reduce the risk of
breast and prostate cancer, but we don’t know
the reasons for this. There isn’t conclusive evidence
that phytoestrogens can prevent the development of these
types of cancer.
My mother has recently been diagnosed with Type
2 diabetes. What should she be eating?
People with Type 2 diabetes should follow general healthy
eating advice. This means eating a balanced diet that
is:
1- low in fat (particularly saturated fat)
2- low in sugar
3- low in salt
high in fruit and vegetables (at least five portions
a day)
high in starchy carbohydrate foods, such as bread, chapatti,
rice, pasta and yams
However, people with diabetes should avoid drinking
large amounts of fruit juice, because the fruit sugar
(fructose) can cause problems with blood sugar control.
Generally, your mother should restrict the amount of
sugary food (such as sweets or cakes) that she eats,
because the body absorbs the sugars from these foods
too quickly and this could interfere with her blood
sugar control. It’s better to eat carbohydrates
in a form that releases sugars more slowly, for example
wholemeal bread.
If she is prone to low blood sugar (hypoglycaemia),
she may sometimes need to eat foods to increase her
blood sugar quickly. If possible, it’s better
to eat something that will increase her blood sugar
gradually, such as a slice of toast. Her GP or nurse
practitioner can advise her on how to be prepared for
hypoglycaemia and how to manage it.
The Food Standards Agency and Diabetes UK (formerly
the British Diabetic Association) don’t recommend
specially labelled ‘diabetic’ products.
These foods aren’t necessarily healthier or more
suitable for people with diabetes than other foods.
And they tend to be more expensive than other products.
Above all, it’s important for your mother to maintain
a healthy weight, especially as she gets older.
Can a person with a nut allergy eat pine nuts?
Pine nuts (sometimes called pine kernels) are not botanically
classified as nuts, but there have been reports of some
cases of allergy to pine nuts, particularly in individuals
who have multiple nut allergies.
Bearing this in mind, it would seem a sensible precaution
to avoid pine nuts if you know that you are allergic
to other nuts. If you are concerned, you could discuss
this with your GP.
My blood pressure is higher than it used to be due
to stress at work. How can I change my diet to make
a difference?
Diet is only one of the factors that affect blood pressure.
Keeping physically active and eating foods lower in
fat can help to prevent weight gain, and might help
to lower your blood pressure.
Sodium is also thought to contribute to raised blood
pressure. The majority of sodium in our diets comes
from salt either in food or added to it. Currently,
most people in the UK eat about 9 g salt per day, but
we should be having only about 6 g.
Here are a few ways you can reduce the amount of salt
in your diet.
1- Reduce the amount of salt you add when cooking
– if you do this gradually, you’ll be surprised
how little you miss the salt,
because your palate will adapt to
the new salt levels.
2- Try cooking with herbs and spices instead
of salt.
3- Taste your food at the table before adding
extra salt.
4- Try to eat fewer processed foods (these contribute
about three-quarters of our salt intake).
5- Look for low-salt varieties of products.
6- Check the nutrition panel on food labels for
salt or sodium content.
These changes to your diet can help reduce blood pressure,
but they can’t eliminate stress, which can cause
raised blood pressure. As well as changing your diet,
check if there is anything you can do at work, and in
your leisure time, to reduce stress.
My husband has high cholesterol and we are trying
to eat a healthier diet. Would it be healthy for my
husband to eat nuts as a snack?
Nuts are a good choice of snack because they are rich
in a wide range of nutrients and high in fibre. They
are also a good source of monounsaturated fat, which
can help reduce blood cholesterol levels.
So it’s OK to eat nuts as a snack, as part of
a healthy balanced diet. But remember, nuts are high
in fat, so try not to eat too many. And your husband
should avoid salted nuts because they are very high
in salt, which can raise blood pressure. Like high cholesterol,
having raised blood pressure increases the chance of
developing heart disease.
Eating foods that are high in saturated fat can raise
levels of cholesterol in the blood. So try to cut down
on foods such as biscuits, cakes, pastries, meat pies,
sausages, hard cheese, butter and foods containing coconut
or palm oil.
Choose foods that are rich in unsaturated fats instead,
such as oily fish, avocados and sunflower, rapeseed
and olive oils. Nuts can be a good alternative to snacks
high in saturated fat. And don’t forget that we
should also try to reduce the total amount of fat we
eat.
Variety is an important part of eating a healthy diet
and this includes snacks as well. Some other healthy
snacks you might like to try include fresh or dried
fruit, low-fat yoghurt, raw vegetables, fruit loaf with
low-fat spread and currant buns (without icing).
Is it true that eating certain foods can improve
medical conditions?
We often read in newspapers or on the Internet about
how certain foods or diets can improve particular medical
conditions.
There has been some research into the health benefits
of individual foods, but in general we need to eat a
variety of food types to make sure we’re getting
the range of nutrients our bodies need.
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Most
people should eat a balanced diet, which means one that
is rich in starchy foods (such as bread, pasta and rice)
and we should choose wholegrain varieties where possible.
We should also be eating:
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lots
of fruit and vegetables (at least five portions a day)
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moderate
amounts of meat, fish or alternatives (such as eggs,
beans and lentils)
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moderate
amounts of milk and dairy foods
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small
amounts of fatty foods or sugary foods or drinks
If you are experiencing health problems, consult your
GP and always seek professional advice before making
major changes to your diet. Avoid cutting out certain
food groups or eating large amounts of any foods because
this could have a negative effect on your health.
A lot of information is available about food, but you
should try to make sure that any advice you take comes
from a reliable source.
If you have a specific medical condition and want personalised
advice, contact a State Registered Dietitian through
your local hospital or GP surgery.
I'm 42 and my mum, who's in her 80s, has bad osteoarthritis.
I've read about cod liver oil being good for this. Should
I start taking it now to protect me when I get older?
When someone has osteoarthritis, the smooth cartilage
that takes the strain in a normal joint becomes rough,
brittle and weak. To compensate, the bone beneath thickens
and spreads out, forming knobbly outgrowths. This causes
stiffness and pain.
This form of arthritis is most common in older people
and is very rare in people under the age of 40. Women
are more likely to suffer from it than men and people
who are overweight or obese are more at risk from the
disease, especially in their knees. Joints that have
suffered injury are also more susceptible to osteoarthritis.
There has been research into the use of fish oil supplements
in treating various forms of arthritis, although the
focus is generally on rheumatoid arthritis as opposed
to osteoarthritis. Rheumatoid arthritis is caused by
the body’s immune system attacking the joints
and causing inflammation.
Fats are involved in the inflammation and it is thought
that those found in fish can affect this process and
help reduce inflammation. Some studies testing this
theory on people with rheumatoid arthritis have shown
benefits, while other studies have shown no benefit
at all. Research is still ongoing.
However, healthy eating guidelines recommend that we
eat fish twice a week and one of these helpings should
be oily fish, such as salmon, mackerel, or sardines.
This may be beneficial for sufferers of rheumatoid arthritis,
because the fats found in oily fish may have an anti-inflammatory
effect.
For osteoarthritis, prevention is key. The best thing
you can do is maintain a healthy weight through eating
a varied and balanced diet and keeping physically active.
Eat a diet that is rich in starchy foods, such as potatoes,
rice, bread, and moderate amounts of meat and dairy
products, with at least five portions of fruit and vegetables
every day. And don’t forget to include your two
portions of fish.
Which foods are best for my little girl aged five
with anaemia? She is not a great lover of meat.
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It’s
important to make sure that your daughter gets a varied
diet that includes iron, because iron is an essential
component of haemoglobin, the red pigment found in blood.
Haemoglobin carries oxygen from the lungs to the tissues
and organs of the body. Two-thirds of the iron present
in the body is found in haemoglobin; the remainder is
stored in the liver, spleen and bone marrow. A small
amount is also found in the muscle protein myoglobin.
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Good
non-meat sources of iron include wholegrain cereals
and flours, leafy green vegetables such as spinach and
watercress, pulses such as lentils, kidney beans and
chick peas, some dried fruits (apricots and figs), and
eggs.
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If
food does not provide sufficient iron to replace the
body’s losses, the stores are gradually depleted
and haemoglobin production is inhibited. This can lead
to iron deficiency and can cause anaemia.
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Dietary
iron exists in two different forms: haem iron and non-haem
iron. Haem iron, which is the form that exists in red
meats and offal, is relatively well absorbed (20-30%).
Non-haem iron is found in plant foods and is generally
less well absorbed (1-10%), but absorption increases
when the body’s stores are depleted and when needs
are greatest, e.g. in growing children or pregnant women.
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A
breakfast cereal fortified with iron and a glass of
orange juice is a good way to start the day. This is
because iron absorption is increased in the presence
of vitamin C.
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If
you give your daughter tea to drink you should think
about doing this only between meals, rather than with
food, because tannins in tea can inhibit iron absorption.
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