Evidence
Do Weight Loss Supplements Work? What the Reviews Found
Do weight loss supplements work? Barely, and not reliably. Pooled reviews of single ingredients found differences of about 1.23 kg for green coffee extract, 0.88 kg for garcinia and 0.04 kg for green tea outside Japan, mostly in short, low-quality trials. NIH says little is known about these products, and no trial tested SodaSlim.
Written by the SodaSlim label deskUpdated · 5 min read
The numbers
Do weight loss supplements work, according to reviews?
Reviews of single ingredients find average differences of about a kilogram or less, so the honest answer is: slightly at best.
A difference between groups is not the same as a result for one person, and none of the trials below tested SodaSlim.
| Ingredient | Review | Difference | Caveat |
|---|---|---|---|
| Green coffee extract | 15 trials, 897 people (Asbaghi 2020, green coffee meta) | 1.23 kg | No link to chlorogenic acid dose |
| Garcinia (HCA) | 2011 review (Onakpoya 2011, garcinia meta) | 0.88 kg | Range touches zero |
| Green tea, outside Japan | Cochrane review (Jurgens 2012, Cochrane green tea) | 0.04 kg | "Not likely clinically important" |
| Caffeine | 13 trials, 606 people (Tabrizi 2019, caffeine and weight) | "Might promote" | Results varied very widely |
Claims vs studies
Why do weight loss supplement ads sound stronger than the studies?
Ads sound stronger because supplements are not approved before sale, and a claim only has to avoid naming a disease.
FDA does not approve supplements, and a supplement may describe an effect on normal body structure or function with a disclaimer. NIH's fact sheet says little is known about weight-loss supplements (NIH ODS, Dietary Supplements for Weight Loss). In 2014 an FTC sweep over weight-loss claims, about 34 million dollars in all, said "the science just isn't there" (FTC 2014, Operation Failed Resolution).
One well-known green coffee trial was retracted that year because its sponsors could not assure the data. Testimonials and star counts are not evidence either.
What helps
Are there weight loss supplements that work better than habits?
We found no source that ranks any supplement above sleep, movement and eating patterns.
CDC's healthy-weight page points to food, activity, sleep and stress together (CDC, About Healthy Weight and Growth). The HHS guidelines set 150 to 300 minutes of moderate activity a week plus strengthening on 2 or more days, and walking counts. For medical options, NIDDK describes prescription medicines and who qualifies. More in our healthy-weight basics and on how to read weight-loss ads.
SodaSlim capsules: 30 to a bottleOne capsule a day · 2, 3 or 6 bottles · price and shipping shown at checkout
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How do SodaSlim's five rows compare?
SodaSlim is a capsule of five ingredients with starred label lines, and none of the five has strong human evidence for weight.
The dials are an editor's reading of how well human studies support each row's label claim, not a measurement or a rating of the product. Most trial doses were also higher than the label's: about 65 mg of chlorogenic acids against 500 mg or more.
Green coffee bean extract
Little28 of 100
A handful of small trials, many with bias concerns, with mixed results. (Onakpoya 2011, green coffee review) (Asbaghi 2020, green coffee meta)
Raspberry ketone
Very little8 of 100
Mostly lab and animal work; very few human trials of the ingredient itself. (Morimoto 2005, raspberry ketone mice) (Lopez 2013, multi-ingredient raspberry ketone)
Garcinia extract
Little18 of 100
A few small human trials with mixed results; reports of liver injury exist. (Onakpoya 2011, garcinia meta) (van Breemen 2025, garcinia liver)
Caffeine
Mixed40 of 100
Well studied for alertness; evidence for body-weight outcomes is limited and mixed. (Tabrizi 2019, caffeine and weight) (FDA, Spilling the Beans caffeine)
Green tea extract
Little30 of 100
Trials on body weight are small and mixed; liver-injury reports exist at high catechin doses. (Jurgens 2012, Cochrane green tea) (LiverTox, green tea)
Our reading of the sources, not a measurement. Each needle is an editor's judgment of how well human studies support the label claim for that one ingredient, at studied amounts. It does not rate SodaSlim: no study tested the capsule or this five-row combination.
Keep taking prescribed medicine; chest pain, fainting or trouble breathing: 911. The ingredients page has each row. Pack options follow.
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FAQ
SodaSlim questions people ask
Which weight loss supplements work best?
No supplement stands out in the sources we read. Pooled results for single ingredients were about 1.23 kg or less, and the best-known trial was retracted. Sleep, movement and food patterns have better support than any capsule.
Are weight loss supplements effective for everyone?
No source suggests they are. Review averages hide wide differences between people, and many trials were short or low in quality. A pooled gap of under a kilogram says little about what one person will see.
Is a doctor's visit better than a supplement?
A visit can check medicines, blood pressure and whether prescription options fit you. NIDDK says lifestyle comes first and describes who qualifies for medicines. A supplement cannot do those checks.
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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