Scientific studies have shown that plant sterols can help lower cholesterol
levels*+. Beta-Sitosterol provides high potency botanicals shown in
clinical studies to address the challenges of prostate health that can lead
to an enlarged prostate. * In addition, it also contains ingredients shown
in clinical studies to help promote healthy and normal cholesterol levels.
Beta-Sitosterol Plant Sterols is a unique dietary supplement rich in the
plant sterols Beta-Sitosterol, Campesterol, and Stigmasterol.
Beta-Sitosterol information:
Beta-sitosterol is a plant-derived sterol. Plant sterols or phytosterols
are common components of plant foods, especially plant oils, seeds and
nuts, cereals and legumes. The most common phytosterols are
beta-sitosterol, campesterol, and stigmasterol. Beta-sitosterol is found in
high amounts in nuts and amaranth.
Benefits of Beta-Sitosterol Confirmed
To confirm these remarkable effects of beta-sitosterol, another study was
performed and the results were published in the British Journal of Urology. The study involved 177 patients with
benign prostate enlargement. Patients received 130 mg of beta-sitosterol
each day and were monitored for more than six months. Measurements of the
International Prostate Symptom Score, urinary flow, and residual urine in
the bladder after voiding were recorded.3
On average, urinary flow values increased by 4.5 ml/second while residual
urine volumes decreased by a substantial 33.5 ml. The International
Prostate Symptom Scores showed a statistically significant improvement.
These results with beta-sitosterol are comparable to those seen with the
commonly prescribed drug Proscar, used to treat benign prostate
enlargement.
Two years later, a review of all existing studies of beta-sitosterol in the
treatment of benign prostate enlargement was conducted. The researchers
identified randomized, placebo-controlled, double-blind trials involving a
total of 519 men. In three of the trials, beta-sitosterol was used, and in
one trial, a glucoside of beta-sitosterol was used. In these studies,
beta-sitosterol improved urinary symptom scores and urinary flow rates, and
significantly reduced the volume of residual urine in the bladder.
How Does Beta-Sitosterol Work?
Prostate-Specific: In the human body, supplemental beta-sitosterol acts in
several ways. First, it protects the prostate against growth caused by
age-related reactivation of increased conversion of testosterone to the
dihydrotestosterone (DHT) form. The higher production of DHT is normal from
puberty to the early 20s, a man's most sexually active period. In an adult,
however, reactivated production of DHT is a major contributing factor in
the undesirable growth of the prostate or benign prostatic hyperplasia
(BPH). By normalizing this conversion and depriving the prostate of the
active metabolite DHT, prostatic tissue growth ceases and existing tissue
atrophies. (Kirby RS, Christmas TJ. Benign Prostate Hyperplasia. London,
England: Mosby-Year Book Europe Limited; 1993) Beta-sitosterol has been
shown to do just this, naturally block this unwanted conversion, reducing
and normalizing the supply of DHT to the prostate, and, in effect, maintain
a normal male hormone balance for a healthy prostate. (Shrinkage in the
volume of the prostate from either beta-sitosterol or use of the herbal
products appears to be a mixed clinical picture. Some reports indicate
significant symptom improvement with no change in volume, while others
report shrinkage. Since beta-sitosterol does not appear to affect prostate
cell apoptosis of the cells stimulated by DHT [unlike cancer cells], the
existing cells and consequent volume increase will only reduce upon their
death after their extended life span. The differences in reports may be due
to the end period of the research protocols, since it seems that this could
take as long as 18 months, long past the endpoint of most research. Also,
beta-sitosterol has no demonstrated effect on inflammation of the prostate,
which could account for some of the reported volume increase.
See Prostate Enlargement Conditions and Cures:
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STUDIES:
Beta-Sitosterol and Cancer*
Preliminary research suggests that beta-sitosterol may help fight colon
cancer. In a 2010 laboratory study published in BMC Complementary and
Alternative Medicine, for instance, scientists found that beta-sitosterol
isolated from the Asclepias curassavica plant inhibited the growth of human
colon cancer cells.
Some research indicates that beta-sitosterol may also fight breast cancer.
For example, a 2003 laboratory study published in Oncology Reports found
that beta-sitosterol induced apoptosis in breast cancer cells. Apoptosis, a
type of programmed cell death, is key to halting the proliferation of
cancer cells.
Furthermore, a 2008 laboratory study published in Molecular Nutrition and
Food Research found that using beta-sitosterol in combination with the
breast cancer drug tamoxifen may enhance the drug's effectiveness.
It's important to note that more research needs to be conducted before
beta-sitosterol can be recommended for the treatment or prevention of any
form of cancer.
Beta-Sitosterol and the Prostate*
There are dozens and dozens of classic double-blind studies done with real
men on the effects of beta-sitosterol on benign prostate hypertrophy or
BPH. Below we have summarized some of these studies, all of which
indicate that beta-sitosterol is a highly effective treatment for BPH.
A most unique review of 31 years of studies was published in volume 280 of
the Journal of the American Medical Association (1998) where they
chose 18 different trials involving 2,939 men in total who were treated for
BPH with strong extracts of saw palmetto containing beta-sitosterol. They
said after reviewing all these studies, "The evidence suggests that Serenoa
repens (saw palmetto) improves urologic symptoms and flow measures."
One of the very best studies done was published in the British Journal of
Urology, volume 80 (1997), at the University of Dresden. Drs. Klippel,
Hilti, and Schipp studied 177 men for 6 months who suffered from BPH. Half
the men got a placebo and half got the prescription extract Azuprostat
containing 130mg of beta-sitosterol. They cited a full 32 references to
substantiate their research. They carefully screened all the men and tested
them extensively during the study. They concluded, "These results show that
a beta-sitosterol is an effective option in the treatment of BPH."
Another unique review in a different manner was done by Dr. Buck in the
British Journal of Urology, volume 78 (1996). At the Department of Urology
in Glasgow, Scotland he did a 12-page review of herbal therapy for the
prostate including Harzol, Tadenan, Permixon, Strogen and Sabalux (all
European prescription herbal extracts standardized for beta-sitosterol
content). He documents his review with 59 published worldwide studies and
discusses the biological basis of prostate illness. His conclusions on the
efficacy of herbal treatment of prescription drugs and therapy are
well-founded certainly.
In the Lancet, vol 345 (1995) a very professional study was done at the
University of Bochum in Herne, Germany by Dr. Berges and his associates.
They used pure beta-sitosterol with 200 men half of whom received a placebo
over the course of a year. They said, "Significant improvement in symptoms
and urinary flow parameters show the effectiveness of beta-sitosterol in
the treatment of BPH." This is clearly one of the most important and
well-done studies on the prostate ever published.
In volume 55 of Current Therapeutic Research (1994) a study done at the
University of Brussels, Belgium by Dr. Braeckman using Prostaserene (an
extract standardized for beta-sitosterol) for a mere six weeks led him to
conclude, "Traditional parameters for quantifying prostatism, such as the
International Prostate Symptom Score, the quality of life score, urinary
flow rates, residual urinary volume, and prostate size were found to be
significantly improved after only 45 days of treatment. After 90 days of
treatment, a majority of patients (88%) and treating physicians (88%)
considered the therapy effective."
A study published in volume 21 of European Urology (1992), at the Institute
of Clinical Medicine at the University of Rome, DiSilverio and his
colleagues studied 35 men with BPH for 3 months and gave half of them a
placebo (inert capsules). They concluded, "On the basis of these
considerations, monotherapy with S. re-pens extract (beta-sitosterol
extracted from saw palmetto) may be more favorably accepted, since on
account of similar clinical results, when compared to the combination
therapy cyproterone acetate plus tamoxifen..."
In the German journal Wiener Klinische Wochenschrift, volume 22 (1990) at
eight different urological clinics in Europe 263 total patients with BPH
were studied over a two month period. They were given either Tadenan (a
Pygeum africanum extract standardized for beta-sitosterol content) or a
placebo. This very extensive study compiled from different clinics and
different doctors yet all agreed that "Treatment with the Pygeum africanum
extract led to a marked clinical improvement: a comparison of the
quantitative parameters showed a significant difference between the Pygeum
africanum group and the placebo group with respect to therapeutic
response."
Again, in Minerva Urologica e Nefrologica, volume 39 (1987), Drs. Bassi et
al at the University of Padova studied 40 men with BPH with an extract of
Pygeum africanum with a high beta-sitosterol content. Half the men received
a placebo and many parameters were measured for the two-month study. They
concluded, "The preliminary results demonstrate a significant improvement
of the frequency, urgency, dysuria (difficult, painful urination) and
urinary flow in patients treated with the active drug."
In the Italian journal Minerva Urologica e Nefrologica, volume 37 (1985),
doctors at the University of Padova studied the effect of beta-sitosterol
extract on 27 men with BPH. Dr. Tasca and his associates measured urine
flow and other parameters in men ranging from ages 49 to 81 compared to men
receiving a placebo.
In the journal Urolage A, volume 24 (1985) at the University of Basel,
Switzerland, Dr. Vontobel and his colleagues studied a strong extract of
nettles containing a high concentration of beta-sitosterol in a
double-blind study of 50 men for nine weeks. They said that the use of
beta-sitosterols from nettles, "The evaluation of the objective parameters
showed significant differences."
The British Journal of Clinical Pharmacology in volume 18 (1984) at the
Hospital Ambroise in Paris, Champault and two other doctors did a classic
double-blind study with 110 men half of them getting a placebo. They
concluded, "Thus as predicted by pharmacological and biochemical studies
PA109 (4 tablets of Permixon daily) would, therefore, appear to be a useful
therapeutic tool in the treatment of BPH."
In Medical Science Research, volume 16 (1983), Drs. Malini and
Vanithakumari at the Institute of Medical Sciences in Madras, India studied
the effect of beta-sitosterol on the fructose concentration of the
prostate. Fructose is vital to the function of the prostate with regard to
androgenic hormones such as DHEA and testosterone. This was a very unique
and thorough study lasting almost two months.
In volume 77 of the German journal Midizinische Klinik (1982) a study done
at the Urological Clinic of Krankenhauser in Ludenscheid-Hellersen was
performed on 23 patients. Dr. Szutrely gave the patients either Harzol
(herbal extract standardized for beta-sitosterol content) or a placebo for
patients with prostate enlargement over a two month period. They measured
their prostates with ultrasound equipment before and after treatment. In
the end, he said, "Within the scope of a controlled double-blind study to
demonstrate the effect of conservative therapy of benign prostatic
hyperplasia with Harzol, ultrasonic examination of the prostate adenoma
(enlargement) was carried out on 23 patients before and after therapy with
the trial preparation of a placebo. Within a two month treatment with
Harzol there was a significant change in echo structure of the prostate
adenoma, and this is interpreted as a reduction in the interstitial
formation of oedema (swelling)."
These have been only a few of the many dozens of medical journal
publications of studies taken place in some of the most important
urological clinics around the world. These studies all indicate that
beta-sitosterol is highly effective in reducing enlarged prostates in BPH
patients as well as significantly decreasing their BPH symptoms.
See All LifeSource Vitamins Prostate Products, Articles and Studies:
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Beta-Sitosterol and Cholesterol*
If there was only one supplement you could take to reduce your cholesterol
it should be beta-sitosterol taken in 300-600 mg doses every day.
Beta-sitosterol is the most studied, most proven, most effective supplement
to lower total and LDL cholesterol. The studies on this in the medical
journals actually go back 50 years yet most people have never even heard of
it, Upjohn Pharmaceuticals tried to make a prescription analog (chemical
relative) of it decades ago for lowering cholesterol but did not succeed -
the natural molecule works best. The scientific community has been well
aware of it and clinics around the world have done extensive studies on
both humans and animals including gall bladder, bile and liver functions
since these are all part of the cholesterol metabolism. The major mechanism
this seems to be effective is simply by preventing the dietary cholesterol
from being absorbed in the intestines where fat is digested. Another way
this seems to work is by increasing the flow of bile acids, which binds the
cholesterol in the digestive tract and excretes it in the feces.
At McGill University in Montreal (Can. J. Physiol. Pharmacol. 75, 1997, p.
217-27) doctors did a review of the literature on beta-sitosterol and
cholesterol metabolism. They researched in detail 18 major studies that
used sitosterols to lower cholesterol and triglycerides. They concluded,
"In addition to the diet of phytosterols represents an effective means of
improving circulating lipid profiles to reduce the risk of coronary heart
disease." This study came complete with forty high-quality references and
left no doubt about the effectiveness of phytosterols on humans. Also at
McGill University (Metabolism Clinic Experiments 47, 1998, p. 751-6)
patients on a fixed diet were given sterols from pine oil for a mere ten
days in a strict, randomized crossover study. This was not a low fat or low
cholesterol diet at all. They successfully lowered both their total
cholesterol and LDL levels in this short term placebo-controlled
experiment. They concluded, these results demonstrate the short term
efficacy of pine oil plant sterols as cholesterol-lowering agents"
A very interesting study was done at the Center for Human Nutrition in
France (Ann. Nutr. Metab. 39, 1995, p. 291-5) in that healthy people with
normal cholesterol levels were given beta-sitosterol to see if their normal
levels could be lowered even further. We always think of studies as using
unhealthy people with pathological cholesterol levels given supplements to
make them normal again. Amazingly enough, the healthy people lowered their
normal cholesterol levels even more with no change in diet or exercise. In
fact, they were a full 10% lower in only a month. This kind of effect is
really fascinating. They said, "The present results may be of great
interest in the prevention of high cholesterol diet-associated risks,
especially in the prevention of cardiovascular diseases. Since
beta-sitosterol was so effective for people who didn't even need it, think
what it will do for those people who do need to lower their blood lipids.
They concluded, "These findings suggest that a significant lowering of
plasma total and LDL cholesterol can be affected by a modest dietary intake
of soybean phytosterols"
A good study was done at the Wageningen Agricultural Institute in the
Netherlands, the same clinic that did so much good research on trans fatty
acids (Am. J. Clin. Nutr. 72, 2000, p. 1510-5). They gave men and women
margarine containing plant sterols and got very significant reductions in
cholesterol as well as lower LDL levels in only three weeks. Why a clinic
would give margarine to people after studying the negative effects of
hydrogenated oils is another matter. Again, these were healthy subjects
with normal cholesterol levels, yet they still got great benefits very
quickly with no change in diet or exercise.
At Uppsala University in Sweden (Eur. Heart J. Supp. 1, 1999, p. S80-S90)
the doctors wanted to give the volunteers the phytosterols in conjunction
with a cholesterol-lowering diet to see the results of a more comprehensive
lifestyle program. The results were really impressive in that the men and
women lowered total cholesterol a full 15% and LDL cholesterol a full 19%
in less than a month. This shows the very dramatic results you can get with
just adding some reasonable dietary changes even without any exercise
program at all.
At the University of British Columbia at their St. Paul's Hospital
(American Journal of Medicine 107 (1999) p. 588-94) a very impressive
review was done completely with 86 references of using plant sterols to
lower total cholesterol and LDL. They said of the recent research, "In 16
recently published human studies that used phytosterols to decrease plasma
cholesterol levels in a total of 590 subjects, phytosterol therapy was
accompanied by an average 10% decrease in total cholesterol and 13%
decrease in LDL cholesterol levels." This is the best review to date and
should convince anyone of the effectiveness of sterols over drugs.
At the University of Kagawa in Tokyo, two studies were done. The first was
done on healthy young men who were given plant sterols for only five days.
In this short time, their cholesterol levels fell measurably (Joshi Eiyo
Daigaku Kiyo 14, 1983, p. 165-72). The second study was done on healthy
young women (same journal 15, 1984 p. 11-18) again giving them plant
sterols for only five days. "Administration of phytosterol (mainly
sitosterol) increased the output of fecal cholesterol." These were all
healthy young Japanese people eating a traditional low-fat diet who did not
have a cholesterol problem, to begin with, yet they received measurable
results in only five days.
At the University of California in San Diego men were isolated in a
hospital ward and fed 350 mg of cholesterol and then beta-sitosterol
supplements (American Journal of Clinical Nutrition 35, 1982, p. 697-700).
This resulted in a 42% decrease in cholesterol absorption in the
intestines. They said, "Evidently, the judicious addition of
beta-sitosterol to meals containing cholesterol-rich foods will result in a
decrease in cholesterol absorption with a consequent decrease in plasma
cholesterol"
The University of Helsinki took a big interest in lowering cholesterol with
plant sterol therapy back in 1988. The first study (Clinical Chimica Acta
178, p. 41-9) studied familial (genetic) hypercholesterolemia. The higher
the sterol levels they found in the patients' blood the more cholesterol
was excreted rather than absorbed. The second study was in 1989 (Metabolism
Clinical Experiments 38, p. 136-40). Men were studied again for blood
levels of sterols and they found the higher the levels the more cholesterol
was excreted successfully. The third study in 1994 (American Journal of
Clinical Nutrition 59, p. 1338-46) studied vegetarians who eat twice as
many plant sterols as normal people. They showed one reason vegetarians
have lower cholesterol levels besides the food they eat is the efficiency
of their cholesterol excretion due to their intakes of plant sterols. In
the last study in 1999 (Current Opinion Lipidology 10, p. Scientific
studies have shown that plant sterols can help lower cholesterol levels*+.
Beta-Sitosterol provides high potency botanicals shown in clinical studies
to address the challenges of prostate health that can lead to an enlarged
prostate. * In addition, it also contains ingredients shown in clinical
studies to help promote healthy and normal cholesterol levels. A Great
Product!*
Beta-Sitosterol provides high potency botanicals shown in clinical studies
to address the challenges of prostate health that can lead to an enlarged
prostate. * In addition, it also contains ingredients shown in clinical
studies to help promote healthy and normal cholesterol levels.
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