Vi
t
ami
n D
Thumb t
e
s
t on t
he s
t
e
rnum.
Fe
e
l
i
ng s
har
p pai
n whi
l
e
pr
e
s
s
i
ng s
t
e
r
num may i
ndi
c
at
e
a l
ac
k of vi
t
ami
n D.
Thi
s vi
t
ami
n
i
s i
mpor
t
ant f
or bone s
t
r
uc
t
ur
e
and i
t
s s
t
r
e
ngt
h,
as we
l
l
as f
or
i
m ne s
mmu
ys
t
e
m.
The
r
e
f
or
e
,
i
t i
s
ne
c
e
s
s
ar
y t
o pe
r
f
or
m a bl
ood t
e
s
t
t
o find out t
he amount of vi
t
ami
n D
you have i
n your bl
ood and dr
i
nk i
t
i
n addi
t
i
on.
I
t c
an c
aus
e a l
ot of he
al
t
h
di
s
or
de
r
s
,
i
nc
l
udi
ng de
pr
e
s
s
i
on.
Vi
t
ami
n B1
2
Bal
anc
i
ng t
e
s
t
.
Cl
os
e your e
ye
s and s
t
and on your
one l
e
g whi
l
e l
i i
ng t
he ot
he
r
.
I
f you c
an'
t hol
d t
he bal
anc
e f
or
3 s
e
c
onds
,
i
t c
an me
an a l
ac
k of
vi
t
ami
n B1
2 i
n your or
gani
s
m.
De
fic
i
e
nc
y of t
hi
s vi
t
ami
n c
an
pr
ovoke ane
mi
a de
ve
l
opme
nt
,
as we
l
l
as damagi
ng your ne
r
ve
s
ys
t
e
m.
Y
ou may f
e
e
l
f
at
i
gue
,
have a
bad mood and have a di
s
t
ur
banc
e
i
n your bal
anc
e
.