Bitter leaf, ugu: Vegetables that can ward off heart problem Heart attack can lead to heart failure, a term that refers to an obstruction to the
blood supply to the heart. Aside the heart pumping blood to the body, it supplies itself
with blood. When it does not supply itself
with blood or the supply becomes obstructed, heart attack happens. The typical blood flows to it is because it is a living tissue apart from the blood flowing through it. However, it is this obstruction in the blood flow to the heart muscles itself that leads to heart attack and it starts gradually. The
blood vessels starts to be choked up, causing what is called arthelocolsosis and over time the problem becomes complicated because the affected blood vessel, the artery, also becomes dead. This is what
causes heart attack.
But before heart attack comes, gradually
from the age of 20, the inner layer of blood
vessels starts developing fat deposit in
them. The fats are deposited in them for
several reasons including hypertension,
high cholesterol in the blood, diabetes,
smoking, sedentary lifestyle, family history
and wrong diets.
Given that the heart is a pump it must
function properly to meet the need of the
body. If there is a problem within the heart
or around it preventing it from pumping
blood to other parts of the body, heart
failure may occur. Meanwhile, many things
can affect this “pump” and make it fail. Just
as heart attack can lead to heart failure, a
common cause of heart failure is
hypertension.
Hypertension is the commonest cause of
heart failure in Nigeria and, to some extent
an individual can guess his chances of
developing heart disease because it is an
interplay of cholesterol, hypertension, and
diabetes. In fact, the World Health
Organisation (WHO) estimates that almost
20 per cent of all strokes and over 50 per
cent of all heart attacks can be linked to
high cholesterol.
Cholesterol is a fat-like substance circulating
in the blood. Some of this cholesterol comes
from the foods consumed. But the bulk of it
is actually made in the body, specifically in
the liver, because the body needs it to make
some hormones and support the function
of body cells. But an excess of it in the
bloodstream can lead to trouble.
Cholesterol comes in several different
forms, but doctors focus mostly on two: LDL
cholesterol and HDL cholesterol. LDL is also
called “bad cholesterol” and it is termed bad
because if its level is too high, the excess
can accumulate on the walls of the arteries.
This build-up of cholesterol and other
substances called plaque, can narrow the
artery like a clogged drain, leading to
arteriosclerosis, or hardening of the
arteries. This makes the normally flexible
tissue more brittle. Plaques can form
anywhere. If they form in the carotid artery
in the neck, what results is carotid artery
disease.
When they form in the coronary arteries —
which supply the heart muscle with blood
— it’s called coronary artery disease. Like
any organ, the heart needs a good supply
of blood to work. If it doesn’t get that blood,
one could get angina, which causes a
squeezing pain in the chest, among other
symptoms.
Notwithstanding, regular consumption of
vegetables such as Vernonia amygdalina
(bitter leaf )and Telfairia occidentalis (Ugu)
can help to regulate the blood’s cholesterol
level. Wondering why? In a study on
comparative effects of the leaves of bitter
leaf and Ugu incorporated diets on the
lipid profile of rats, it was apparent that the
two diet preparations lowered the blood
(serum) cholesterol levels though the Ugu
diet induced a higher effect at lower
concentrations.
The 2011 study published in the African
Journal of Biochemistry Research involved
C. E. Ugwu and J. E. Olajide from the
Department of Biochemistry, Kogi State
University, Anyigba, in collaboration with E.
O. Alumana and L. U. S. Ezeanyika from the
Department of Biochemistry, University of
Nigeria, Nsukka, Enugu State. It was entitled:
“Comparative effects of the leaves of
Vernonia amygdalina and Telfairia
occidentalis incorporated diets on the lipid
profile of rats”.
The treatment of hypertension has failed to
show definitive effect on the incidence of
coronary heart disease, which has aroused
interest in lipid metabolism in hypertensive
therapy.
The results from the study showed that the
treatment with bitter leaf and ugwu diets
led to a significant increase in serum HDL-C,
showing their protective role in
cardiovascular diseases (CVD). The
comparison of their effects showed that
ugwu diet preparation stimulated a
considerable increase in serum HDL-C
compared to bitter leaf.
Vernonia amygdalina, also called bitter leaf
because of its bitter taste, is a shrub that
grows predominantly in Tropical Africa. The
leaves have found relevance in traditional
folk medicine as a dewormer, a laxative
herb and an antimalarial as they are known
as quinine substitute. They are also used in
the treatment of cough and hypertension.
Telfairia occidentalis (fluted pumpkin or
Ugwu) leaves and young shoots are
frequently eaten as a potherb. The herbal
preparation of the plant has been employed
in the treatment of sudden attack of
convulsion, malaria and anaemia.
The seed of fluted pumpkin is widely
consumed in Nigeria, especially in the
southeastern part of Nigeria where it is
used as a condiment in soup. The fermented
seeds of fluted pumpkin are used in the
production of “Ogiri ugu”, a locally made
custard. The seeds of fluted pumpkin could
also be used in cookie formulations and
marmalade manufacturing. The seed is also
a good source of edible oil.
They wrote: “the results from this study
confirm that V. amygdalina and T.
occidentalis have lipid lowering effects
which may be beneficial to people at risk of
CVD. V. amygdalina and T. occidentalis were
found to be effective in lowering the levels
of serum cholesterol, triacylglycerols and
LDL-C, thereby, showing their
hypocholesterolaemic(reducing cholesterol
level) property. These leaves could be
beneficial to people at high risk of
cardiovascular disease.”
In carrying out the study, the rats were fed
for 28 days on diets specially formulated to
contain 5, 15 and 30 per cent by weight
respectively of the leaves of each plant
while the control group was fed standard
rat diet. The serum total cholesterol (TC),
triacylglycerol (TG), high-density lipoprotein
cholesterol (HDL-C) and low-density
lipoprotein cholesterol (LDL-C) were
determined on blood samples collected on
the 28th day using standard methods.
Certainly, different foods lower cholesterol
in various ways but another easy step to
ensure a safe cholesterol level is having a
bowl of oatmeal for breakfast. Beans,
eggplant and okra are especially rich in
soluble fibre that mops up cholesterol.
Substituting your cooking oil with
vegetable oils, such as canola and
sunflower, helps to lower LDL. Fruits such as
apples, grapes, strawberries and citrus
fruits are rich in pectin, a type of soluble
fibre that lowers LDL.
In addition, eating fishes two or three times
a week can lower LDL by replacing meat,
which has LDL-boosting saturated fats, and
by delivering LDL-lowering omega-3 fats.
Omega-3s reduce triglycerides in the blood
stream and also protect the heart by helping
to prevent the onset of abnormal heart
rhythms.
Interestingly, researchers stated in the
Pakistan Journal of Nutrition that garden
egg was the best when a comparison study
was carried on on apple, oat and garden
egg. They pointed out that “garden egg
significantly reduced the total cholesterol
and triglyceride as well as increased the HDL
compared to oat and apple in both the mid-
term and full-term studies.” Contact us through your comment for more on these products.