Preparation, uses, and tips
Broccoli can be eaten raw or cooked. Place it in a colander and rinse it thoroughly before
preparing. Unless the stalks are especially tender, cut off the thick base of the stalks and
peel them. Cut the head into florets. Raw broccoli can be used for crudités served with
dips, or can be added to salads. When adding broccoli to cold grain salads, blanch it first by
boiling for just two minutes. Then drain and rinse immediately with cold water. This brightens
the colour of the broccoli and develops the flavour.
To cook broccoli, first cut into bite-sized pieces.
To boil
Boil broccoli in lightly salted water until just tender crisp, about four minutes.
To steam
Steam pieces about five minutes and whole stalks of broccoli for about ten minutes, until
tender-crisp.
To sauté
Sauté in olive oil with garlic and
herbs until tender-crisp, about ten minutes. Sautéed broccoli can be tossed with
cooked pasta and sprinkled with Parmesan cheese.
To microwave
Cook on High for five minutes; then let stand for three minutes before serving.
Flavours that go well with broccoli are basil,
caraway seed, curry powder, dill, fresh lemon juice,
herb-infused vinegar, marjoram, oregano,
tarragon, and thyme.
Health benefits and concerns
Asthma
Vitamin C, present in fruits and
vegetables, is a powerful antioxidant and
anti-inflammatory. This anti-inflammatory activity may influence the development of asthma
symptoms. A large preliminary study has shown that young children with asthma experience
significantly less wheezing if they eat a diet high in fruits rich in vitamin C.
Bruising
Many Americans eat insufficient amounts of foods containing vitamin C; the disease caused
by vitamin C deficiency, scurvy, causes easy bruising. While very few people actually have
scurvy, even minor deficiencies of vitamin C can increase the incidence of bruising. People
who experience easy bruising may want to try eating more fruits and vegetables—common
dietary sources of vitamin C.
Cancer
The strong association between increased intake of
beta-carotene from food and a reduced risk of lung
cancer does not necessarily mean that supplementation with natural beta-carotene
supplements would reduce the risk of lung cancer. Dietary beta-carotene may be a marker for
diets high in certain fruits and vegetables that contain other anticancer substances that may
be responsible for the protective effects. Until more is known, some doctors advise smokers to
avoid all forms of beta-carotene supplementation—even natural beta-carotene.
Foods high in vitamin K such as vegetables typically
are associated with low cancer risk. Despite the fact that the anti-vitamin K drug
warfarin might reduce the risk of cancer under certain circumstances, no evidence suggests
that avoidance of vitamin K (from food or from supplements) would in any way help protect
against cancer.
Calcium D-glucarate is available as a
supplement, and is also found in fruits and vegetables in a slightly altered
form—D-glucaric acid. Preliminary evidence suggests that calcium D-glucarate indirectly
helps the body lower its burden of oestrogen—an effect that might reduce the risk of
breast cancer. Although animal research supports such a possibility, no human trials have been
published to evaluate whether calcium D-glucarate has a therapeutic or preventive effect.
Cruciferous vegetables—broccoli,
Brussels sprouts, cauliflower, and cabbage—contain a substance called indole-3-carbinol (I3C). In preliminary research, I3C has
been reported to affect the metabolism of oestrogen in a way that might protect against breast
and other female cancers, an idea supported by animal and test tube research.
Diindolylmethane (DIM) is another substance found in cruciferous vegetables. Test tube and
animal studies suggest that it may help protect against breast cancer. However, no clinical
trials with cancer patients given DIM have yet been published.
Sulforaphane is a substance found in broccoli,
particularly the sprouts, that has been reported to have anticancer activity in animal and
test tube research. Broccoli sprouts come from broccoli-sprouting seeds and are harvested when
they are 3 days old. No trials in which cancer patients were given sulforaphane supplements
have yet been published.
Capillary
fragility
Eating plenty of flavonoid- and vitamin C-rich fruits
and vegetables helps to support the structure of capillaries.
Cataracts
Some but not all studies have reported that eating more foods rich in beta-carotene or vitamin A was associated with a lower risk of cataracts.
Synthetic beta-carotene supplementation has not been found to reduce the risk of cataract
formation. It remains unclear whether natural beta-carotene from food or supplements would
protect the eye or whether beta-carotene in food is merely a marker for other protective
factors in fruits and vegetables high in beta-carotene.
High
homocysteine
A controlled trial showed that eating a diet high in fruits and vegetables containing folic acid, beta-carotene, and vitamin C effectively lowered
homocysteine levels. Healthy people were assigned to either a diet containing a pound of
fruits and vegetables per day, or to a diet containing 3 1/2 ounces (99g) of fruits and
vegetables per day. After four weeks, those eating the higher amount of fruits and vegetables
had an 11 percent lower homocysteine level compared to those eating the lower amount of fruits
and vegetables.
Hypothyroidism
Some foods, such as rapeseed (used to make rape seed oil) and Brassica family vegetables
(cabbage, Brussels sprouts, broccoli, and cauliflower), contain natural substances that can
interfere with thyroid hormone synthesis, resulting in goitre. Cooking has been reported to
inactivate this effect in Brussels sprouts.
Macular
degeneration
People who eat plenty of fruits and vegetables high in beta-carotene appear to be at lower risk
for macular degeneration than people who do not eat these foods. However, another study found
no association between age-related macular degeneration and intake of antioxidants, either
from the diet, from supplements, or from both combined. More research is needed to reconcile
these differences. In the meantime, beta-carotene-rich vegetables continue to be part of a
healthful diet.
Multiple sclerosis (MS)
In one survey, researchers gathered information from nearly 400 people (half with MS) over
three years. They found that consumption of vegetable protein, fruit juice, and foods rich in
vitamin C, thiamine, riboflavin, calcium, and potassium correlated with a decreased MS risk.
Pregnancy
Pregnant women should consume 1,500mg of calcium per day.
Food sources of calcium include milk products, dark green
leafy vegetables, tofu, sardines (canned with edible
bones), salmon (canned with edible bones), peas, and beans.
Stroke
Diets high in fruit and/or vegetables are associated with a reduced risk of stroke,
according to most studies. In a large preliminary study, cruciferous and green leafy
vegetables, conferred the highest degree of protection. Because it is not clear which
components of fruits and vegetables are most responsible for the protective effect against
stroke, people wishing to reduce their risk of stroke should rely primarily on eating more
fruits and vegetables themselves rather than taking supplements.
Health benefits and
concerns for vegetables
Many health benefits and concerns associated with this food are applicable to other
vegetables. Read about health benefits and concerns
for vegetables for a full description.