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Multiple
Sclerosis
and
Sunlight
It
is
believed
that
sunlight
offers
some
protection
against
multiple
sclerosis
(MS)
since
the
disease
is
rare
near
the
equator
and
more
prevalent
at
high
latitudes.
What
is
it
about
sunlight
that
offers
this
protection?
To
find
out,
researchers!
injected
mice
with
proteins
that
induce
a
condition
in
mice
comparable
to
MS
in
humans.
The
control
mice
got
only
the
injection,
while
a
second
group
of
mice
were
exposed
to
UV
light
before
and
after
the
injection,
and
a
third
group
of
mice
received
vitamin
D
supplements
before
and
after
the
injection.
In
the
test
comparing
UV
light
to
the
control
group,
evidence
was
found
that
the
mice
exposed
to
UV
suppressed
the
MS-like
disease
significantly
better
than
the
control
mice.
In
the
test
comparing
mice
getting
vitamin
D
supplements
to
the
control
group,
the
mice
given
the
vitamin
D
did
not
fare
significantly
better
than
the
control
group.
If
the
p-values
for
the
two
tests are
1)
0.324
and
2)
0.008
,
which
p-value
goes
with
which
test?
UV
Test
Vitamin
D
-
1
v
Test
1Seppa,
N.,
“Sunlight
may
Cut
MS
Risk
by
Itself”
Science
News,
April
24,
2010,
p.
9,
reporting
on
a
study
in
the
Proceedings
of
the
National
Academy
of
Science,
March
22,
2010.
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