Page 14
The Willner Window Product Reference Catalog, Winter 2016
since 1911
• Willner Chemists •
the nutritional supplement professionals
Dizzy? Correcting Vitamin D
Deficiency May Help
Several earlier studies had found a link
between vitamin D deficiency and sudden,
non-life-threatening dizziness triggered by
head movement, known as benign paroxys-
mal positional vertigo (BPPV), but no studies
had tested treating with vitamin D supple-
ments. In BPPV, calcium crystals embedded
in the inner ear dislodge and flow into inner
ear fluid, sending false movement signals to
the brain.
In this study, 93 people with single-ear
BPPV and vitamin D levels of 10 nanograms
per milliliter of blood (ng/mL) or less, took
50,000 IU of vitamin D once every two
weeks, plus 600 mg of calcium twice per
day.
After three months, 14 percent of those
whose vitamin D levels had increased by at
least 10 ng/mL experienced a recurrence of
BPPV compared to 43 percent of those
whose vitamin D levels had increased less
than 10 ng/mL, leading doctors to conclude
that raising vitamin D levels can significantly
reduce chances of BPPV recurring.
Reference: International Journal of ORL &
HNS; September, 2015, Published Online
Athletes Take Note: Nutrients
Improve Sports Endurance And
Muscle Function
L-Citrulline And Endurance
Increasing blood flow is key to increasing
endurance. Nitric oxide (NO) helps relax and
dilate blood vessels, and arginine can pro-
duce NO, but only 1 percent of ingested
arginine is available for absorption. Citrulline
can increase arginine levels.
In this study, 10 healthy men completed a
moderate to severe cycling exercise on days
six and seven of a 7-day supplementation
period with placebo, 6 grams of arginine, or
6 grams of citrulline per day, in three alter-
nating phases.
L-arginine increased during the citrulline
phases, as did signs of increased NO produc-
tion. The men taking citrulline performed
better during the exercise, had greater mus-
cle oxygenation and faster oxygen uptake.
Blood pressure was lower during the cit-
rulline phases compared to arginine or place-
bo.
Reference: Journal of Applied Physiology;
2015, Vol. 119, No. 4, 385-95
Omega-3 Supplements And Muscle
Function
In this study, 30 male athletes, average age
25 and typically training for 17 hours per
week, took 375 mg of EPA, 230 mg of DPA,
and 510 mg of DHA from seal oil per day, or
a placebo.
After three weeks, while there was no
change for placebo, thigh muscle function
increased by 20 percent for those taking seal
oil. Also, 50 percent of the omega-3 men
had improved time trials compared to 33
percent for placebo.
Commenting on the findings, doctors said
this is the first study to measure the effects of
omega-3 supplements on neuromuscular
function and performance, and that omega-
3s may have a positive effect in athletes.
Reference: Journal of the International
Society of Sports Nutrition; 2015, Vol. 12,
Published Online
Does Statin Therapy Really
Lower Coq10 Levels?
Doctors most often prescribe statin drugs
for lowering LDL cholesterol levels. One of
the side effects is muscle pain, possibly due
to lower levels of CoQ10, a naturally occur-
ring antioxidant in every cell.
In this study, doctors reviewed eight place-
bo-controlled trials that measured the effect
of statin therapy on CoQ10 levels. All of
those taking statins had lower levels of
CoQ10, regardless of which of the four types
of statin drug they were taking.
A new study is underway, using a dose of
600 mg of CoQ10 per day, or a placebo, to
determine if CoQ10 can reduce muscle pain
in those on statin therapy.
Reference: Pharmacological Research;
September, 2015, Vol. 99, 329-36
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