How it works: Animal studies show that it can inhibit a fat-producing enzyme in the body and increase levels of serotonin, potentially helping to reduce cravings.
Effectiveness: One study with 130 people compared garcinia against a dummy pill. There was no difference in weight or body fat percentage between groups.
A 2011 review that looked at 12 studies on garcinia cambogia found that, on average, it caused weight loss of about 2 pounds (0.88 kg) over several weeks.
Side effects: There are no reports of serious side effects, but some reports of mild digestive problems.
US $14.81
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Green coffee beans are
simply normal coffee beans that haven't been roasted.
Green coffee beans are
simply normal coffee beans that haven't been roasted.
They contain two substances
believed to help with weight loss, caffeine and chlorogenic acid.
How it works: Caffeine can increase fat burning,
and chlorogenic acid can slow the breakdown of carbohydrates in
the gut.
Effectiveness: Several human studies have shown
that green coffee bean extract can help people lose weight.
A review of 3 studies found
that the supplement made people lose 5.4 more pounds (2.5 kg) than placebo, a
dummy pill.
Other benefits: Green coffee bean extract may help
lower blood sugar levels, and reduce blood pressure. It is also high in
antioxidants.
Side effects: It can cause the same side effects
as caffeine. The chlorogenic acid in it may also cause diarrhea, and some
people may be allergic to green coffee beans.
US $14.24
Green tea extract is a popular ingredient in many weight loss
supplements.
This is because numerous studies have shown the main antioxidant in
it, EGCG, to aid fat burning.
How it works: Green tea extract is believed to
increase the activity of norepinephrine, a hormone that helps you burn fat
Effectiveness: Many human studies have shown that
green tea extract can increase fat burning and cause fat loss, especially in the belly area.
Side effects: Green tea extract is generally
well tolerated. It does contain some caffeine, and may cause symptoms in people
who are caffeine sensitive.
Additionally, all of the health benefits of drinking green tea should apply to
green tea extract as well.
US $17.77
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Glucomannan is a type of fiber found in the roots of the elephant yam,
also called konjac.
How it works: Glucomannan absorbs
water and becomes gel-like. It "sits" in your gut and promotes a
feeling of fullness, helping you eat fewer calories.
Effectiveness: Three human studies showed
that glucomannan, combined with a healthy diet, can help people lose 8-10
pounds (3.6-4.5 kg) of weight in 5 weeks
Other benefits: Glucomannan is a fiber
that can feed the friendly bacteria in the intestine. It can also lower blood
sugar, blood cholesterol and triglycerides, and is very effective against
constipation.
Side effects: It can cause bloating,
flatulence and soft stools, and can interfere with some oral medications if
taken at the same time.
It is important to take
glucomannan about a half an hour before meals, with a glass of water.
US $16.78
US $16.78
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