Folic Acid
Folate is a term
that refers to different forms of
folic acid. Some foods, such as
dark leafy green vegetables, are a
great source of folic acid, while
other foods are fortified with
folic acid. In order for
appropriate absorption, folic acid
needs to go through a metabolic
process which occurs at a pH of
about 6-7. [9] In addition, folate has a very
synergistic relationship with vitamin
B12, as many metabolic reactions and
processes in the body are
dependent on these cofactors.
For example, proper function of nerves
and nerve conduction are directly
related to these two nutrients. In
fact, a primary sign of B-12 and folate deficiency is impaired
sensations in the limbs.
While not
exclusively singled out as the
cause of Restless Leg Syndrome,
inadequate intake of these
nutrients may predispose one to
this condition. In a study
concerning 6 women aged 31- 70
with various neurological
disorders including restless leg
syndrome, improvement in their
symptoms could be attributed to
folic acid supplementation. This
study suggests restless leg
syndrome could be one of the main
clinical presentations of a folic
acid deficiency. [10] Researching examining folic and
iron deficiency in pregnant women
also provides evidence that low
levels of each of these nutrients
may be a contributing factor in
Restless Leg Syndrome. [11]
Magnesium
Magnesium, an
important and abundant mineral in
the body, plays a positive role in
Restless Leg Syndrome. Magnesium is shown to contribute
to over 300 metabolic reactions in
the body, including energy
production and protein and
carbohydrate metabolism. [12] Magnesium also plays a role in
nerve conduction, especially those
concerning muscle function. Magnesium acts as
a mild muscle relaxant, and may
serve to relax the muscles of the
limbs, ensuring that proper levels
of rest occurs during
periods of sleep.
Although both low
and high levels of magnesium have been
reported in those with RSL,
supplementation seems to help with
symptoms. A study involving 10
subjects suffering from insomnia
due to restless leg syndrome
showed an improvement in sleep and
Restless Leg Syndrome symptoms
after supplementation with
magnesium. [13,
14]
Magnesium is necessary to maintain
the electrical potentials of
nerves and muscles, and for the
transmission of these impulses
across the neuromuscular junction.
Iron
Iron is the most
important transitional metal in
the body, since it is involved in
several metabolic processes, such
as DNA synthesis and energy
production. This process is related to its
ability as an electron
donor/acceptor and oxygen
transporter. [15] While a deficiency can cause
anemia, an excess can cause hemochromatosis and thus tight
regulation is important for proper
function on many levels.
Deficiency can have an effect
on the central
nervous system and there are
implications that low levels of
iron can contribute to Restless
Leg Syndrome. [16]
Restless Leg
Syndrome is children may have a
direct connection to iron deficiency. A
study completed by the Mayo Clinic
involving 538 children with sleep
disorders (23 with diagnosed
Restless Leg Syndrome), showed a
commonality of low blood iron
levels. In addition, research done
with pregnant women shows that low
iron levels may be a contributing
factor to the Restless Leg
Syndrome that is commonly
experienced. [17]
Kava Kava (Piper
methysticum)
Kava has been
traditionally used as a ceremonial
herb as early as the late 1600's.
Today it is known for its uses in
anxiety disorders,
stress, insomnia, and
restlessness, musculoskeletal pain
and more. The herb's pharmacological activity has
mainly been attributed to
components called kava-lactones.
Due to
its sedative effects, it has been
shown to improve sleep quality,
making it a good option for those
that suffer from restless leg
syndrome as an obstacle to sleep.
Some research suggests that the
sedative effects may be due to an
increase in GABA binding sites,
and that it can produce local
muscle paralysis by mechanisms
similar to cocaine. [18,
19]
Furthermore,
the produced muscle sedation does
not effect respiration. [20]
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