Review: Isatori's MX-LS7 (Maximum Strength Lean System 7) -

Review: Isatori’s MX-LS7 (Maximum Strength Lean System 7)

What do you get if you take Isatori’s extremely popular Lean System 7 fat burner and ramp up the ingredients profile?

That’s right…

… you get MX-LS7, or Maximum Strength Lean System 7.

(MX-LS7 is actually marketed as “the fat burner for men”, but there really isn’t any reason why women can’t use this product too!).

What do I need to know about LS7?

The now discontinued Lean System 7 (LS7) was one of the few fat burners that we actually recommended on this site. Here’s why…

  1. Lean System 7 was one of the few fat burners on the market today that has a real, valid clinical study backing up its claims.
  2. When purchased direct from Isatori online here, your satisfaction is guaranteed or your money back. And this company will refund your money, no questions asked.
  3. Commitment to customer satisfaction and a high standard of ethics. At I see and hear about the actions of a lot of scummy retailers and companies. Isatori has continued to impress me with their high standard of ethics and commitment to you, the customer.

In fact, Isatori was recently nominated for an award by a prestigious consumer advocate company in Colorado. You don’t get nominated for such an award unless you know how to treat your customers.

When you combine the above with a decent ingredient profile, you’ve got a product well worth trying!

The foundation of MX-LS7 is built closely upon the ingredient profile of the original LS7. From there, two new complexes are added — a thyroid support complex (called T3/cAMP Activator Blend) and the “Cognition Complex”, designed to enhance mental acuity and focus during workouts. Here’s how MX-LS7 breaks down…

1. LS7 Core Complex: The thermogenic (or fat burning) element and the foundation of this formula, this is basically the original Lean System 7 formula. Rather than repeat myself, you can read the review of the original Lean System 7 formula here! (This link opens in a new window).

2. T3/camp Activator Blend: This new element of the formula is designed to boost the metabolism by supporting enhanced thyroid function. Here’s what’s in it…

i. L-tyrosine: Because tyrosine is a precursor to the thyroid hormone thyroxine, supplementation might boost thyroid levels (American Journal Clinical Nutrition 2001;73:153-7).

However, there is no published data to suggest supplementing with tyrosine leads to weight loss, and certainly not at the dosage included here (human studies on l-tyrosine typically use multi-gram doses).

ii. Guggul lipid extract: Usually standardized for guggulsterones, several studies validate this ingredient’s thyroid-stimulating activity (Planta Med 1988;54:271-7, Curr Ther Res 1999; 60:220-7).

It is thought guggulsterones increase the synthesis of T3, by the conversion of T4 to T3. Nonetheless, while guggul’s effects on weight loss have been clinically demonstrated, they are extremely mild.

iii. Evodia rutaecarpa extract (standardized for evodiamine): a Chinese fruit that some claim burns fat by increasing the body’s production of heat, as well as reducing the body’s ability to store fat.

The claims are supposedly “scientifically” proven. The problem is, they haven’t been scientifically proven in humans. There have been some promising “in vitro” studies and some done on rodents, but the jury is still out on whether this product has positive weight loss effect for humans (see this PubMed extract for more details).

iv. Coleus forskohlii and Clary Sage: both these ingredients are common to fat burners, as they are cAMP stimulators. cAMP is a “cellular regulator.” In other words, this compound is required to “spark” many intercellular processes. An increased concentration of camp can have such “total-body” effects as raised thyroid hormone levels and increased fat burning.

While the effects of clary stage have not been clinically demonstrated, Coleus forskohlii does appear to be helpful for weight loss—but again, only mildly so, and at a higher dosage than included here.

3. Cognition Complex: As indicated earlier, this element of the formula is designed to enhance mental acuity and focus during workouts. Here’s what’s in it…

i. Xanthinol Nicotinate: a super-potent form of niacin (vitamin B3) it has been shown to improve short term memory, improve brain ATP levels and brain glucose metabolism.

ii. Bacopin: a standardized extract of the Bacopa monniera plant, this ingredient has also shown a tendency to improve memory, reduce anxiety and enhance alertness.

iii. Vinpocetine: a derivative of an alkaloid derived of a plant from the periwinkle family. In Europe, Japan and Mexico it’s used as a pharmaceutical agent for the treatment of cerebrovascular and cognitive disorders. It may have a slight effect on elevating metabolism, but at this time, that’s mostly speculation.

What’s the bottom line on MX-LS7?

Well, considering…

  • The foundation of this formula has already been proven effective in a clinical study.
  • The new complexes do improve upon the old formula.
  • Visitor feedback, although anecdotal, is mostly positive.
  • And for all the reasons detailed above (especially the money-back guarantee)…

… we have no problem recommending that you try experimenting with this product. Of course, MX-LS7 is no miracle pill, and should only be used in conjunction with a sensible diet and exercise plan.

We don’t recommend a lot of products on this site, but we do like the Isatori brand. Why? The biggest reason is that they offer a “real” money back guarantee. And by “real”, I mean one that they honor. They do put “their money where their mouth is” so to speak, by eliminating the risk from a purchase.

Of course there is a small catch; you have to order direct from them. If you do, however, they offer a 60-day unconditional “no-questions asked” money back guarantee (less shipping and handling).

No “ifs” and no “buts”. No voice mail, and no spending weeks trying to get a hold of customer service rep. Just quality, dependable service from a company that believes in treating its customers right.

Unlike other companies that offer “lip service” warranties (i.e., they promise satisfaction but make it impossible to obtain a refund) Isatori actually honors their guarantee. In the years we have been recommending Isatori’s products, we rarely hear anything but positive feedback on their products, their customer service and their business ethics. For that reason, we have no reservations about recommending this product. After all, if you’re unsatisfied, simply return it for refund.

Click here to purchase MX-LS7 direct! 


Summary of iSatori MX-LS7
  • The foundation of this formula has already been proven effective in a clinical study.
  • Produced by a solid company with a good reputation.
  • Contains green tea extract, caffeine and other useful ingredients.
  • User feedback mostly positive.
  • Contains some “speculative” ingredients.
  • Proprietary blends make it difficult to determine dosage of individual ingredients.
  • L-Tyrosine is underdosed.

Author: Paul

Paul Crane is the founder of His passions include supplements, working out, motorcycles, guitars... and of course, his German Shepherd dogs.


  1. I first tried LX-MX7 after looking at several reviews, in particular the one on this site.

    I started taking 2-4 per day, usually 1st thing in the morning and then around 11AM if I took a second serving. I was also on a diet and exercise plan, so I can’t be certain the extent to which accounted for my fat loss, but over a roughly 8-10 week period I lost around 8-10 lbs and saw a marked (3-4%) decrease in bodyfat.

    What I can attest to about the product, however, is that it gave me a boost of energy to get me going through my morning cardio workout, but unlike Lipo-6 or other burners I’ve taken in the past, didn’t give me that jittery feeling. Its a very “clean” energy boost, that I really liked.

    I’d definitely recommend the product for others.

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  2. I’ve tried 3 courses of this stuff. It worked every time, but with varying results. Over the course of the year my weight fluctuates maybe 15lbs. Not a huge amount, but enough that people can see a difference, and I can feel it too. I usually pick up the weight during winter when I can’t excercise as much, then get back into shape in early spring. I’ve had three distinct experiences with MX-LS7.

    1st course (slow start, worked up to a medium does eventually) was with a moderate increase in exercise (40 minute bike ride 3 times a week, I normally do 30 minutes of walking a day and crunches and push ups in the morning year round) and basically no diet change (mostly healthful meals with sadly a lot of cheating in between). I noticed a modest increase in energy and stamina during exercise and in 2 weeks I lost 8 lbs. Not bad.

    Second round the next year, I didn’t even add exercise initially. I started at a medium does and with no other changes in diet or activity I lost 5 lbs in 2 weeks. Then I got back on track with the exercise and lost another 10 lbs over the next 3 weeks.

    Next year I ended up gaining more wight, more like 20lbs. I had bought a pair of pants and by the time I wore them 3 weeks later they were painfully tight. I looked at myself in the mirror and was shocked by the paunch I was developing. I was so shocked and horrified (shallow aren’t I ? It was only ~20lbs) I grabbed me another bottle of this stuff and hit the max dose (but never exceeded it mind you) right off the bat + 1hr bike rides 6 days a week and I drastically cut down on fattening foods (switched to veggies, chicken, fish, pasta occasionally, limited carbs, and protein shakes ) and ate very sensible portions. I lost 12 lbs in 7 days. The tight pants were then easy to remove even when zipped and buttoned (in fact they were so loose they would fall off without a belt). That scared me, so I backed off on the pills. Dropped back to a medium dose and lost another 8 lbs over the next 2 weeks. My 6 pack peaked through for the first time in years.

    Long story short. This product is not bunk like many others. Whatever is in it, it can be an effective weight loss aid. An AID, not a solution. To see any real progress it’s best used in conjunction with a good food plan and exercise routine. And like ALL others it’s best to start slow and ramp up as you make sure you’re body is accepting it. Also, I tried this product at a low dose as a maintenance aid as well. You build up a resistance to it over time, so you either have to increase the dose or get back on the wagon. It’s best used in courses to jumpstart REAL changes in your life.

    No free lunches in this life. Best wishes to all!

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  3. Just started using Mx-LS7 today and an having a funny sensation on my tongue. Has any one experienced that and any suggestions? I am taking the recommended dose – 3 in the morning & 3 in the afternoon.

    Editor’s comments: Reduce your dosage by a single cap per each dosage to assess your tolerance to your product.

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  4. Hi
    Can somebody please tell me what happens once you stop taking these tablets? Id really like to get into shape, but I don’t want to have to be on these fat burners for the rest of my life to keep in shape.

    Editor’s comments: A lot of people find that supplements like these suppress their appetites. Now suppose you take the product, eat less than usual, eat better, exercise, and subsequently, lose weight. If you stop taking the product, start eating more, adopt your old bad habits the weight will definitely come back. If you stop taking the product and maintain a sensible level of calories PLUS a healthy lifestyle and exercise program, there’s no reason for the weight to come back.

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  5. I will give it a four because it did help me lose weight. I used it for 2 days and lost about 6 pounds. On the second day however, I had to go to the emergency room because I couldn’t breathe. It turns out the fat burner caused me to have a panic attack (I have no previous history of panic attacks). This is a great fat burner if you are not as sensitive as I am. It is definitely not the pill for me.

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  6. Just started mx-ls7. taking recommended dosage 3 in the morning and 3 in the afternoon. noticed a big increase in energy levels and waking up very early in the morning an hour or two earlier than normal. lost two pounds in the first two days. have a reasonable diet and exercise between 40 minutes to an hour each day. Gonna see out the full tub and see how I get on!!

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  7. I know this product works, I have used it for a couple weeks, and I do have noticeable results, HOWEVER, I am a competitive swimmer, and I train really hard in the water as well as the weight room, and after a week of this product I started puking more often.

    I usually puke at practices once every two weeks (of exhaustion), but it seemed to become more than just occasional, I started puking bout 5 times a week, out of eight practices! I am not 100% if it was the product, but I did not change my diet, I didn’t change anything, I just started to take MX-LS7. If you experience anything like this, stop. Otherwise i believe the product works, but maybe a little too well for me or something.

    Editor’s comments: Stimulant based fat burners allow you to push yourself further than is normally capable. If you normally work out so hard that you are sick, it’s likely the product is enabling you to push yourself this hard more often. This is not necessarily a good thing.

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  8. i believe that this supplement really does work, but i am just very concerned about upping my dosage. i have gone from taking 3 pills, to taking 8. thats a big difference to me. i am very immune to strong diet supplements it seems. this stuff really does HELP you lose weight, but it does not just fall right off for you. i work out almost every other day and try to eat decent food:) i love my sweets, so this can be a challenge. personally, i would tell you to not take these every day, try taking them every other day, so your body wont get so immune to it soo quickly. one day of not taking the pills will not make a huge difference, so just try it out and see what works best with your body. Happy Dieting!!!

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  9. I started taking MaxLS7 on September 17, 2011 and use this supplement to this day.

    I had been hoping to publish the differences in my fat percentage loss for that month via the Tanita body scale but alas, those scales proved to be inaccurate and cannot be relied upon, at least in my case.

    However, I can say that in the entire month that I have been using this supplement, my waist is four inches smaller, I have dropped a size in jeans and because I love my muscles, my abs are starting to appear (belly is now flat) and biceps are larger and more full.

    I basically consumed healthy food though allowed some indulgence on weekends and monitored calorie intake to about 1600-1800 calories per day. I combined strength training four to five times a week, and cardio 5 to six times a week.

    The real miracle here is that I can’t stop training!!! I was significantly obese in 2007 and lost up to 20kg without supplements just by training and watching my food. However, I then found it difficult to train more than twice or three times per week due to often feeling lethargic and tired (especially from the work I do which can involve long shifts). MxLS7 has definitely given me incredible levels of energy that have been consistent and even feel natural, and I’m well into my second bottle. I also alas can’t prove it, but I know from my past experiences with losing body fat and muscle gain that these supplements have boosted and sped up the process for me, perhaps due mainly to the fact that I have so much energy while training, and in my overall daily life.

    I also want to make a special note to thank the staff at Isatori. I will not mention names to protect privacy, but I didn’t even order directly from Isatori (they don’t deliver to my country), and have exchanged frequent emails with the staff here. Staff here were not only encouraging, but willing to answer any query I might have had regarding training, fat loss, eating and so on. A special thank you to Isatori staff.

    Finally, two of my own friends, and possibly a few more in the future, are now taking this product. One of my friends is a fellow gym member, and like me, she feels like she can finally train consistently and even enjoy training more with this supplement. That’s another note I wanted to add. I personally feel a kind of blissful energy while training, and enjoy it to the point where I can’t wait to do something new the next day.

    Many special thanks for recommending this product, I will continue to take it for some months as I now have no doubt that I will reach my goals.


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  10. Probably would work if i took them for long enough. Let me explain a bit further. The ‘if’ part, after each dose, lets say my bowels moved for the rest of the day, rather debilitating, so i stopped using them. Now for the ‘probably’, I would probably lose weight if i continued with the diarrhoea, seems to work for many parts of the third world, unfortunately. Personally i would not bother wasting my money on what is nothing but a very expensive laxative.

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  11. I have taken other thermogenics and various fat burners in the past. As soon as the next day after I took ISATORI MX-LS7 for the first time I experienced pretty significant side effects. Extreme exhaustion, dizziness, depression, frequent urination a veritable grocery list of unwanted symptoms. The product looked good from the ads, but id stay FAR away from it! All of our bodies are different, maybe itll work fantastically for you. I wouldnt take that chance if I were you though

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  12. I have really benefited from this product and feel the difference when using it. I do maintain a healthy diet (most of the time 😉 ) and exercise regularly.

    When I took the product for the first time I did have a strange sensation of being light headed, irritated and generally I didn’t like the sensation. But after the first pill My body system must have adjusted and it is now fine.

    It really helps with my training and yes I do sweat a lot when doing my cardio and weights session but with its themo ingredients that what I would expect. I would say don’t take this product if you are not training as I can imagine there would be no where for the extra energy to be channelled.

    I take it half an hour before training and I have to say that my body shape has definitely changed for the better. I put this down to a combination of a good diet, and regular exercise with the aid of a good Protein shake and this tablet. I do not overdo the products and take less than the recommended dose. One tablet before training and one scoop of protein after training. This is as much as I can handle and really as much as I need.

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  13. My first day on it and 3 hours after taking my first dose, mind you i start these things slow to learn my tolerance (1 capsule), i was light headed, sick bloated feeling, and was vomitting and had diarrhoea by my first break at work. This is following other instructions exactly other than dosage, took my dose, ate my 350 calorie breakfast, 4 eggs(one yolk) cottage cheese and peppers and onions for taste. Some of these products are great and im sure this will work for some but my experience told me to pack it in and just stick to my diet and regular exercise. I will not be venturing back in to a dietary supplement. Wish i could have lost the weight quicker but this is not how i wanted to do it.

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  14. On the third day of taking this tablet I had to visit the Hospital as I could not sleep in the last 36 hrs and heart rate had increased.
    Did all the tests ..ECG, ECHO and no permanent damage had occurred. No easy way to loose weight. Learnt it the hard way ..

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  15. Titanium Dioxide, health hazard

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