Updated: 01/14/2018

Lean Source Review - 6 Things You Need to Know


Guess what we did this week? We obsessed over the ingredients, side effects, clinical studies, and customer satisfaction related to Lean Source. Then, we combed through forums and retail venues to track down user reviews. Then, we condensed and refined to give you the bottom line.

Lean Source Readers: Click here to find out why we're giving away samples of our product, Burn HD.

What is Lean Source?

To start, Lean Source is a dietary supplement pill that supposedly speeds up metabolism and burns fat. It has a fairly simple list of ingredients that includes 7 Keto, Conjugated Linoleic Acid, Chromium, and Green Tea Extract. These, when used in conjunction, are supposed to boost metabolism, decrease hunger and support healthy weight-loss. We couldn’t find a label or instructions on how to take the product.

Lean Source is a product developed and sold by Lifetime Fitness, a popular fitness company. Trainers at these facilities will often sell patrons this particular supplement. The supplement was sold through the official website, but it is no longer listed. We like the ease of use and natural ingredients, but read on…

Mediocre Results – “Our First Concern”

First off, this particular supplement doesn’t seem very effective, based on user reviews. “The combination of Lean Source ingredients should provide at least a mild effect on body fat,” said our Research Editor. “Green Tea and Chromium are the two with the most research, but there are still dieters out there that don’t see what they expected.”

“It didn’t do anything for me,” said one reviewer.

Another said, “I did it for 3 weeks and gained 2 lbs. I returned it for a full refund at the gym. I hope that you have better results.”

Unproven Ingredients – “A Real Issue?”

Are the ingredients in Lean Source totally ineffective? Probably not. But all aren’t reliable either.

Ods.od.nih.gov says that CLA has “minimal effective on body weight and body fat,” and lists abdominal discomfort and constipation as possible side effects.

WebMD claims that there, “isn’t enough information on 7-Keto to know if it is safe.”

Green tea extract is probably the most reliable ingredient, and it is inexpensive from online retailers.

In the process of doing hundreds of these reviews, we’ve found that even minor drawbacks can hinder the long-term success of a supplement. One such negative would be a lack of timely, concrete results. If Lean Source does fail to deliver, customers are unlikely to continue taking it and waiting for results to kick in.

The Science – “Clinically Studied?”

This brings us to the matter of science. Should we trust the research behind Lean Source? It doesn’t seem to be backed by any clinical studies. There is not a strong connection between CLA, 7-Keto and weight-loss and the company doesn’t bother to claim one. We’re surprised, however, that facts about chromium and green tea are also left out. Here at DietSpotlight, we can’t express how important proof is to our final decision.

What Users Are Saying

"”I love how these pills don’t make me feel weird after taking them.”"

"”Found that if I take recommended doses it gives me headaches. When I reduced to 2 pills a day no more headaches.”"

"”I can’t tell if it had any effect at all. I took this religiously for 10 weeks while on a strict diet. I don’t think it improved my progress or results by any noticeable degree.”"

The Bottom Line – Does Lean Source Work?

So, are we raving about this one? We gave Lean Source a lot of scrutiny and what we found intrigued us. Though it’s made with natural ingredients we have a few concerns with it. There are the unproven ingredients and lackluster results that will likely affect your weight-loss results. Plus, not all customer reviews report the best outcomes.

Do you still need a supplement to help you burn off some weight? Consider researching products that are backed by clinical testing and have more potent ingredients. Don’t spend your money on something that doesn’t have the support of tons of users and dieters.

Among the best products we’ve seen this year is one called Dietspotlight Burn. It utilizes a proprietary blend of four ingredients that have been clinically tested and shown to help boost fat burn and metabolism. The online reviews look fantastic, and little talk of side effects has emerged.

What’s more, the makers of Dietspotlight Burn are offering a special trial offer always a good sign.

Learn More About Burn HD »
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Previous Lean Source Review (Updated November 27, 2011):

What You Should Know

Lean Source, which is a weight loss supplement, is manufactured by Life Time Fitness. There is an official website for Lean Source that tells us how this weight loss supplement will accelerate a user's metabolism, boost fat oxidation and decrease your fat storage without any harmful stimulants included in the product's formula. The manufacturers of Lean Source also manufacture other weight loss products such as milk replacement shakes, meal replacement bars and bakery bars.


The simple ingredients in Lean Source consist of Conjugated Linoleic Acid, Chromium, and Green Tea Extract.

Product Features

The official manufacturer's website tells us that users should take two capsules of Lean Source in the morning with breakfast, and two capsules in the evening. We are also told that those using Lean Source should not exceed four capsules in one day. This weight loss supplement can be ordered directly on line from the official Lean Source website at a price of $29.99 for 120 capsules. The website does not tell us what distinguishes Lean Source from other similar weight loss supplements on the market. Yet, there are other supplements for sale that contain exactly the same ingredients as the ingredients contained in Lean Source. After reading about literally hundreds of products, we can say that Green Tea Extract and Chromium are two of the most common ingredients in weight loss supplements on the market today. We know of course that Green Tea Extract is high in antioxidants, which brings with it beneficial general health advantages. It also increases the metabolism of the body. Chromium acts to balance blood sugar levels in the body. Although the official website gives contact details for those consumers who have any questions or concerns regarding this product, there does not seem to be a trial period given or a manufacturer's money back guarantee offered, unlike with some other weight loss products currently for sale.


  • You can order Lean Source directly online.
  • You can take advantage of an online meal planning tool on the official website.
  • Lean Source is reasonably priced.


  • Lean Source contains ingredients that are similar to a whole host of other weight loss products currently for sale, with little to set it apart as a weight loss supplement.
  • There does not seem to be a money back guarantee.
  • There is no free trial period given.
  • We are not told what distinguishes Lean Source from other products containing these same ingredients.


At the end of the day competition amongst the manufacturers of weight loss products is tough, particularly between those products like Lean source that contain Green tea as a main active ingredient. These manufacturers must really make an effort to illustrate what makes their product superior to others that also contain Green Tea Extract. Unfortunately we are not convinced that Lean Source is superior to other similar products on the market, based on looking at their customer service policies and the clinical product data that they offer potential consumers.

Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

2 Lean Source Reviews

  •   Side effects
    shadi (Verified User)

    I need to know what are the possible side effects of lean source. where can I read about complete patient trial and who can take it who can not?

    • Maribel (Editor)

      Hello Shadi. All users are different and can experience different side effects; please make sure to consult with your physician before taking this product. Also, refer to the Lean Source official website for more information.