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Introduction

In a world full of elusively-named products, MaxiNutrition is one of the pack leaders (right next to USN). This MaxiNutrition Lean review will be looking at how this product works and whether or not we recommend it for weight loss.

Readers please note that statements on this page are fair comment based on observation. This content is produced on a matter of public interest. Statements on this page are our honest opinion.

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What Is MaxiNutrition Lean?

Lean Definition is a low calorie diet protein shake produced by MaxiNutrition (formerly Maxi Muscle). The shake is high in protein and features several ingredients that will help boost energy and overall increase your workout performance.

You can buy this product from the official MaxiNutrition Lean website. It is also available in most supplements stores and Amazon.

Does MaxiNutrition Lean Work?

If you were expecting this product to cut the fat straight off your body within one tub worth of powder while you sit on the couch watching Love Island, you’ll be disappointed.

We would to class this shake as a “weight loss support shake”, rather than a cutting edge weight loss shake; By this we mean that the product alone isn’t really going to burn body fat or suppress appetite, however the ingredients inside can be helpful to somebody who leads an active lifestyle.

This product does not contain any scientifically proven ingredients for weight loss – however the ingredients that it does contain will boost energy, heighten mental focus and will most likely allow you to work harder in the gym; This may result in weight loss.

The Pros & Cons Of MaxiNutrition Lean

Below we’ve rounded up everything we found to be a positive or negative aspect:

The Pros

  • High in protein per serving.
  • Caffeine content will boost energy.

The Cons

  • Doesn’t contain any scientifically proven weight loss ingredients.
  • Product carries some potentially negative side effects.
  • Very expensive product.
  • No money-back guarantee.
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What Are The MaxiNutrition Lean Ingredients?

We have found the following ingredient information via the Musclefood website:

One Serving Contains: Whey Protein Isolate, Hydrolysed Whey Protein Isolate, Sweeteners (Xylitol, Sucralose) Cocoa Powder (5%) Safflower Oil Powder, Fructooligosaccharides, Flavoring, Thickener (Cellulose Gum) Guarana Seed Extract, Caffeine, Green Tea Extract, and Pantothenic Acid.

Is MaxiNutrition Lean Suitable For Everyone?

This product isn’t suitable for those with allergens to Milk or Soy. MaxiNutrition Lean shouldn’t be used by anyone who’s under the age of 18, or by pregnant or breastfeeding women.

Ingredients inside the Lean formula could worsen symptoms of IBS, anxiety, or bi-polar disorder.

Is MaxiNutrition Lean Safe?

As you’d expect from a top rated nutrition company, the formula is free from anything that’s banned or officially deemed as dangerous – we do not believe MaxiNutrition poses any sort of health risk to consumers who use it correctly as directed.

What Are The MaxiNutrition Lean Side Effects?

We’ve compiled the following potential side effects based on the ingredients inside this formula:

  • Increased bowel movements
  • Nausea
  • Increased thirst
  • Bloating
  • Cramps
  • Tiredness
  • Headache [1]

Note: these side effects are possible but may not be the typical user experience.

Are There Any MaxiNutrition Lean Reviews From Customers?

We have found the following MaxiNutrition Lean Definition review testimonials:

This is a reformulated product and is awful. Even when mixed as instructed it tastes powdery and leaves a nasty after taste. I have used two scoops from the tub and can’t stomach any more. A waste of money!

I bought this item because I like my protein shakes but when I used it once it turned yellow and brown and tasted funny and it had a weird smell once I opened it up the product was still in date but I ended up throwing it out!

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Our Final Verdict On MaxiNutrition Lean

To summarize our final thoughts on this MaxiNutrition Lean Definition review, it’s a bit of a mixed bag – there are things that we like about it and things that we aren’t too blown away by for readers who are interested in losing weight quickly. The formula is completely lacking in any scientifically proven ingredients – Yes the formula will boost your energy levels and is high in protein, however this product is not going to burn your fat.

This shake would be great for supporting your workouts in the gym, but we would not recommend it as your dedicated weight loss shake supplement.

Marina Ma, MD
Marina Ma, MD
Staff Writer & Fact Checker at DietProbe
Marina has an MD from U-M and is a resident writer and fact checker at DietProbe.
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Fact Checked


This article has been reviewed and fact-checked by a certified nutritionist, and only uses information from credible academic sources.