Explained
What Is a Fat Burner? The Usual Ingredients and What Studies Found
What is a fat burner? It is a sales term, not a drug class, for supplements usually built on caffeine plus plant extracts such as green tea, green coffee and garcinia. The idea is that they raise energy use or change appetite. Studies of the parts show small, uneven gaps, and no trial tested SodaSlim.
Written by the SodaSlim label deskUpdated · 5 min read
Definition
What is a fat burner supplement?
A fat burner is a sales term for a dietary supplement marketed around energy, appetite or weight, and it has no medical definition we could find.
Because FDA does not approve supplements, a maker may describe an effect on normal body function if it carries the FDA disclaimer; naming a disease would turn the claim into a drug claim (FDA structure/function claims). That is why labels use soft, starred wording instead of promises.
Ingredients
What are the usual fat burner ingredients, and what do studies show?
The usual ingredients are caffeine and a few plant extracts, and each has a claim that outruns its evidence.
| Ingredient | Claimed to | What studies found |
|---|---|---|
| Caffeine | Raise energy use | 13 trials, 606 people; "might promote" weight loss, results very inconsistent (Tabrizi 2019, caffeine and weight) |
| Green tea extract | Support weight | 0.04 kg outside Japan, "not likely clinically important" (Jurgens 2012, Cochrane green tea) |
| Green coffee extract | Support weight | 15 trials, 897 people: 1.23 kg (Asbaghi 2020, green coffee meta) |
| Garcinia (HCA) | Limit fat storage | 0.88 kg, range touching zero; 1,500 mg for 12 weeks (135 people) no different from placebo (Heymsfield 1998, garcinia RCT) |
| Raspberry ketone | Fat breakdown | We found no human trial of the ketone alone |
How it works
What does a fat burner do, and how does it work?
The marketed idea is "thermogenic" action, meaning more heat and energy use, but we found no proof of it in people at label amounts.
The effect you can feel is from the stimulant: caffeine causes jitters, a faster heartbeat and poor sleep when the total runs high, and FDA's reference for healthy adults is 400 mg a day from all sources (FDA, Spilling the Beans caffeine). NIH's fact sheet says little is known about weight-loss supplements overall (NIH ODS, Dietary Supplements for Weight Loss).
Food, movement and sleep carry most of the evidence on weight. Our label versus studies page sets each row against the studied amounts.
SodaSlim capsules: 30 to a bottleOne capsule a day · 2, 3 or 6 bottles · price and shipping shown at checkout
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Is SodaSlim a fat burner?
SodaSlim is a dietary supplement capsule; "fat burner" is only a category name that sellers and shoppers apply.
The label never uses those words. It prints “Promotes Energy Production From Fat*” with a star that leads to the FDA statement. It is a capsule, not a soda, and its five rows are the ones in the table above, with caffeine at 138 mg or more; the Supplement Facts page has the panel. Jump to any row below.
Keep taking prescribed medicine; chest pain, fainting or trouble breathing: 911. Pack options follow.
90-day supply
3 bottles: 90 days
90 capsulesone a day · price shown at checkout
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180-day supply
6 bottles: 180 days
180 capsulesone a day · price shown at checkout
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See 6 bottlesPrices are shown at checkout (SodaSlim sales site). Two bottles are also sold. Check your medicines with your doctor or pharmacist before you order.
FAQ
SodaSlim questions people ask
Is a fat burner the same as a diet pill?
The terms overlap and neither has a legal definition we found. Both describe supplements sold for weight. A prescription weight medicine is a different thing, tested as a drug, and NIDDK describes who qualifies.
Do fat burners really burn fat?
We found no trial showing that any fat burner does. Pooled studies of the ingredients found differences of about 1.23 kg or less in short trials. Treat the name as marketing, not a description of what happens in the body.
What is in a typical fat burner?
Usually caffeine plus plant extracts such as green tea, green coffee or garcinia. Always read the Supplement Facts panel for amounts in milligrams, and add up the caffeine.
Who wrote this
Written and reviewed by
Pages built from the label, the seller's brief and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site of a USA Authorized SodaSlim Retailer. It is not the manufacturer, and the label names Gex Corporation LLP (Ogden, Utah) as the distributor. We earn money when you buy through our order links.
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