8 Popular Weight Loss Pills and Supplements Reviewed

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This best-selected list of popular weight loss pills and supplements reviewed should be able to help you decide which ones actually work stay true to their promises of, fat burned and increased energy

Below are the 8 Popular Weight Loss Pills and Supplements

  1. Raspberry Ketones

Raspberry ketone is a substance found in raspberries, which is responsible for their distinct smell.

A synthetic version of raspberry ketones is sold as a weight loss supplement.

How it works: In isolated fat cells from rats, raspberry ketones increase breakdown of fat and increase levels of a hormone called adiponectin, believed to be related to weight loss (17).

Effectiveness: There is not a single study on raspberry ketones in humans, but one rat study using massive doses showed that they reduced weight gain (18).

Side effects: They may cause your burps to smell like raspberries.

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2. Caffeine

Caffeine is the most commonly consumed psychoactive substance in the world (6).

It is found naturally in coffee, green tea, and dark chocolate, and added to many processed foods and beverages.

Caffeine is a well-known metabolism booster, and is often added to commercial weight loss supplements.

How it works: Short-term studies have shown that caffeine can boost metabolism by 3-11%, and increase fat burning by up to 29% (78910).

Effectiveness: There are also some studies showing that caffeine can cause modest weight loss in humans (1112).

Side effects: In some people, high amounts of caffeine can cause anxiety, insomnia, jitteriness, irritability, nausea, diarrhea and other symptoms. Caffeine is also addictive and can reduce the quality of your sleep.

3. Hydrolyzed Collagen

hydrolyzed collagen has been around for more than a decade, and is currently one of the most popular weight loss supplements in the world.

There are several different types, but the most common one is simply called “hydrolyzed collagen.”

How it works: It contains several ingredients that are claimed to help with weight loss, including caffeine and a few plant extracts. It’s easy to mix with beverages, smoothies and food and has a relatively neutral flavor.

Effectiveness: One study showed that it caused 21 lbs (9.5 kg) of weight loss over a 3 month period (5).

Side effects: If you are caffeine sensitive, you may experience anxiety, jitteriness, tremors, nausea, diarrhea and irritability.

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  1. Garcinia Cambogia Extract

Garcinia cambogia became popular worldwide after being featured on the Dr. Oz show in 2012.

It is a small, green fruit, shaped like a pumpkin.

The skin of the fruit contains hydroxycitric acid (HCA). This is the active ingredient in garcinia cambogia extract, which is marketed as a diet pill.

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 (12).

Effectiveness: One study with 130 people compared garcinia against a dummy pill. There was no difference in weight or body fat percentage between groups (3).

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5. Green Coffee Bean Extract

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 (1920).

A review of 3 studies found that the supplement made people lose 5.4 more pounds (2.5 kg) than placebo, a dummy pill (21).

Other benefits: Green coffee bean extract may help lower blood sugar levels, and reduce blood pressure. It is also high in antioxidants (22232425).

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6. Glucomannan

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 (27).

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 (28).

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 (293031).

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7. Green Tea Extract

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 (33).

Effectiveness: Many human studies have shown that green tea extract can increase fat burning and cause fat loss, especially in the belly area(34353637).

Side effects: Green tea extract is generally well tolerated. It does contain some caffeine, and may cause symptoms in people who are caffeine sensitive.

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8. Conjugated Linoleic Acid (CLA)

Conjugated linoleic acid, or CLA, has been a popular fat loss supplement for years.

It is one of the “healthier” trans fats, and is found naturally in some fatty animal foods like cheese and butter.

How it works: CLA may reduce appetite, boost metabolism and stimulate the breakdown of body fat (3839).

Effectiveness: In a major review of 18 different studies, CLA caused weight loss of about 0.2 pounds (0.1 kg) per week, for up to 6 months (40).

According to another review study from 2012, CLA can make you lose about 3 lbs (1.3 kg) of weight, compared to a dummy pill (41).

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Vai (source) healthline.com

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