Initially Posted: 05/24/2019
Weight Loss Supplements Tested by ConsumerLab.com

Alphabetical list of 7-keto DHEA, forskolin, and herbal stimulant weight loss supplement brands compared in this review

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BioGanix Pure Forskolin Extract

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Burn XT

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Douglas Laboratories 7-Keto

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Herbalife Total Control

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Life Extension 7-Keto DHEA Metabolite 100 mg

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Muscletech Hydroxycut Hardcore Elite

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Nature's Answer Forskohlii Weight Control

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Natures Plus Herbal Actives Coleus Forskohlii

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Paradise Coleus Forskolii

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Premier Research Labs Lean Advantage

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Puritan's Pride 7-Keto DHEA 25 mg

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Rock Star Skinny Gal Thermogenic

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Source Naturals 7-Keto

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Xenadrine Ultimate Weight Loss

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In this Review, CL tested stimulant blends (which are some of the most popular weight loss supplements and contain caffeine and/or synephrine), as well as supplements with 7-keto DHEA or forskolin (from Coleus forskohlii). CL has separately reviewed many other types of supplements used for weight loss (See our reports on other supplements used for weight loss: Chromium, Garcinia cambogia, Green Coffee Bean, and Green Tea, as well as information about Raspberry Ketone). There isn't overwhelming evidence that any dietary supplement enables significant, long-term weight loss. However, many small studies — typically funded by supplement companies -- suggest short-term weight loss, slimming (reducing fat but not overall weight), and/or appetite reduction (see What It Does for a summary of the evidence). What did we find? Laboratory tests and analyses by ConsumerLab revealed potentially dangerous amounts of caffeine in three products and a potentially dangerous amount of synephrine in another — twice the amount expected from its label. In addition, one Forskohlii supplement contained less than 5% of its expected forskolin. All of the 7-keto DHEA supplements contained their claimed amounts. Across products, the dose of caffeine ranged from 51.6 mg to 270 mg per serving in stimulant blends, 7-keto DHEA ranged from 25 mg to 100 mg, and forskolin ranged from just 1.9 mg to 50 mg. The cost to obtain 100 mg of 7-keto DHEA ranged from 15 cents to $3.00 and the cost for 25 mg of forskolin ranged from 33 cents to $1.40 -- showing huge opportunity for savings when buying these products. For details, see What CL Found
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Among products Approved in testing, ConsumerLab selected a Top Pick for 7-Keto DHEA and a Top Pick for Forskolin, with each providing the clinically tested dosage at relatively low cost. A Top Pick Stimulant Blend was also chosen that provided a safe level of caffeine.

You must be a member to get the full test results for weight loss supplements along with ConsumerLab.com recommendations, comments, and quality ratings. You will get results for thirteen supplements selected by ConsumerLab.com for testing and for one other that passed voluntary Quality Certification Testing.

In this comprehensive review, you'll discover:
  • Which weight loss supplements failed testing and which passed
  • ConsumerLab's Top Picks among products
  • Direct comparisons, reviews, and quality ratings of weight loss supplements 
  • The pros, cons, and weight loss evidence for bitter orange, calcium, caffeine, Garcinia cambogia, stimulant herbs, chitosan, chromium, diuretics, ephedra, forskolin, green tea, hoodia, L-carnitine, pyruvate, raspberry ketone, 7-keto DHEA, stimulant laxatives like senna, and vitamin C  
  • Dosage for 7-keto DHEA and forskolin
  • Concerns, cautions, and drug interactions for caffeine and many ingredients common in weight loss supplements  

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