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9 Side Effects Of Having High Doses Of Vitamin D
Vitamin D is an important nutrient required for the proper functioning of the muscle, heart, lung and brain. This vitamin helps your body absorb minerals, such as calcium and phosphorus, needed for the formation of bones.
The intake of vitamin D through foods or supplements benefit your health in many ways, such as losing weight, supporting bone health, lowering depression, protecting against heart disease and so on.
But, excessive intake of vitamin D can be harmful to your body as well. Read on to know the side effects of taking too much of vitamin D.
1. Hypercalcemia
Vitamin
D
toxicity
leads
to
hypercalcemia,
a
condition
that
occurs
when
the
calcium
levels
in
your
blood
are
above
normal.
High
levels
of
vitamin
D
leads
to
an
increase
in
calcium
that
your
body
absorbs
and
this
can
cause
a
range
of
complications,
such
as
loss
of
appetite,
confusion
and
high
blood
pressure
[1].
The
symptoms
are
chest
pain,
high
blood
pressure,
irritability
and
anxiety.
2. Kidney damage
Having
high
amounts
of
vitamin
D
can
lead
to
kidney
damage.
It
is
because
an
excessive
amount
of
vitamin
D
increases
calcium
levels
in
the
blood,
which
leads
to
kidney
damage.
A
study
showed
that
vitamin
D
toxicity
can
lead
to
acute
kidney
injury
[2].
The
symptoms
are
fever,
nausea
and
vomiting
or
severe
stomach
pain.
3. Weak bones
Vitamin
D
in
excess
amounts
causes
bone
loss
and
brittle
bones.
It
is
because
high
levels
of
vitamin
D
lead
to
low
levels
of
vitamin
K2
in
the
blood.
The
primary
function
of
vitamin
K2
is
to
preserve
calcium
in
the
bones
and
taking
excess
of
vitamin
D
can
reduce
the
activity
of
vitamin
K2
[3].
The
symptoms
of
brittle
bones
are
painful
bones,
severe
back
or
joint
pain,
increased
risk
of
fractures
and
instability.
4. Irregular heartbeat
Excessive
intake
of
Vitamin
D
causes
hypercalcemia
and
this,
in
turn,
can
alter
the
proper
functioning
of
the
heart's
cells,
which
leads
to
irregular
heartbeat.
High
levels
of
calcium
cause
calcium
deposits
to
develop
in
the
arteries
of
the
heart,
which
can
increase
the
risk
of
heart
attack
[4].
The
symptoms
are
chest
pain,
exhaustion
and
dizziness.
5. Lung damage
High
levels
of
vitamin
D
increase
the
levels
of
calcium
and
phosphate
in
the
blood
that
combine
together
to
form
crystals.
These
crystals
are
more
likely
to
accumulate
in
the
lungs,
which
can
impair
its
function,
thus
causing
lung
damage.
The
symptoms
are
coughing,
difficulty
in
breathing
and
chest
pain.
6. Dehydration
As vitamin D toxicity increases the calcium levels in the blood, it can pose a risk to the kidneys' ability to concentrate urine. This results in uncontrollably passing large quantities of urine, which in turn causes dehydration.
7. Nausea and vomiting
Nausea and vomiting are other side effects of taking excessive amounts of vitamin D, which occurs when there are increased levels of calcium in the blood [5].
8. Stomach pain
Vitamin D toxicity leads to an increase in calcium levels, which in turn causes severe stomach pain. It also causes other digestive problems such as constipation and diarrhoea [6].
9. Pancreatitis
High intake of vitamin D elevates calcium levels and this can cause acute pancreatitis-it is an inflammation of the pancreas. The symptoms of acute pancreatitis include losing weight, pain in the upper part of the stomach and fever.
Other risks of taking high doses of vitamin D are dry mouth, loss of appetite, exhaustion, continuous headaches, muscle weakness, changes in gait, high blood pressure, tinnitus, hearing loss, coma and gastric ulcers.
To Conclude...
Taking high doses of vitamin D supplements for an extended period of time pose a harmful risk and each person may respond differently depending on the symptoms. Consult your doctor, before you take vitamin D supplements.
Common FAQs
What happens when your vitamin D is low?
When your vitamin D levels are low, you will notice symptoms like bone loss, hair loss, muscle pain, depression, fatigue and getting sick often.
Do vitamin D pills work?
People who don't get enough amounts of vitamin D from food get it from supplements. It prevents vitamin D deficiency, reduces osteoporosis risk, improves depression and lowers diabetes risk.
How much vitamin D should I take daily?
The recommended dietary allowance (RDA) for adults is 600 IU of vitamin D per day.
What is the best time to take vitamin D?
The best time to take vitamin D supplements is in the morning, have it with meals for better absorption of the vitamin.
What is the proper way to take vitamin D?
Take vitamin D supplements on an empty stomach in the morning before having breakfast.
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