The Opti-Lean Meal Replacement powder is another product in Optimum Nutrition’s ‘Opti-lean’ range. Is this product worth the money? Will it help you lose weight? In this Opti-Lean Meal Replacement Powder review we’re looking in depth at this product.

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, not fact. Let’s take a look at the top level pros and cons of this product:

Opti-Lean Meal Replacement Powder Benefits:

  • Low calorie meal replacement
  • Protein content allows for easy muscle growth
  • More than one flavor option

Opti-Lean Meal Replacement Powder Drawbacks:

  • Contains no fat burning or metabolism boosting ingredients 
  • Won’t really work to suppress appetite for very long
  • Will only contribute to weight loss if users replace two of their daily meals with the shakes
  • Quite expensive for what is essentially just a protein shake with added vitamins
  • No money-back guarantee

opti-lean meal replacement powder product image

Editor’s note: Shopping around? Click here to check out our most recommended shake for weight loss.

Some Quick Information About Opti-Lean Meal Replacement Powder

Ultra-Lean Meal Replacement Powder is a product you’ve more than likely seen in several health food shops. If you aren’t new to sports nutrition products you won’t need us to tell you that Optimum Nutrition are one of the biggest companies in the industry. Owned by Glanbia, a dairy conglomerate, the brand produces a huge range of milk-protein based shakes.

The concept for the Ultra-Lean Meal Replacement Powder is actually pretty simple, users will replace their three daily meals with these shakes in order to lower their daily calorie in-take.. thus resulting in steady weight loss.

First, some context; If you’re in the market looking for a powerful fat burning, metabolism boosting and appetite suppressing weight loss shake, this product is not for you. The Opti-Lean Meal Replacement Powder is what we would called a “convenience shake” rather than a bonafide fat burning shake. The product providers users an easy way to lower their daily calories without having to rigorously plan their meals in advance – you’re got piece of mind that all you need to do is consume three of these shakes per day. If that’s all you’re looking for, then by all means this product should definitely be on your hit-list of potential buys.

We believe that this product is actually let down by it’s formula vs. price-point. Our Opti-Lean Meal Replacement Powder review team have stated that this product is certainly not cheap, in fact it’s actually priced higher than some of the most potent fat burning weight loss shakes we’ve reviewed in the past.

For a product that really is just a well-branded protein powder with added vitamins, minerals and carbohydrates we feel that there are numerous other products that do the same, but cheaper.. again, that’s if you’re just looking for a simple meal replacement shake and not an advanced weight loss shake.

Does Opti-Lean Meal Replacement Powder Work?

The complicated answer to this is yes and no. The simple answer to this is.. no. Simply put, users lose weight with the Opti-Lean Meal Replacement Powder due to a lowered-calorie diet. There are not fat burning or appetite suppressing ingredients at work in this product to speak of.. you’re simply eating less calories and your body will slowly lose weight because of this fact. These shakes will do nothing to speed up weight loss.

That because said, the big problem with all meal replacement shakes is that once a user discontinues using the shakes the weight typically returns. Unless you’re planning to stay using the Opti-Lean Meal Replacement Powder indefinitely, you may not see long-term weight loss success with it.

What Are The Opti-Lean Meal Replacement Powder Ingredients?

We have found the following ingredient information from

One Serving Contains: Protein Blend (Whey Protein Concentrate, Micellar Casein, Emulsifier: Soy Lecithin), OAT° Fibre, OAT° Flour, Chickpea Powder, Medium Chain Triglyceride Powder [MILK], Inulin, Ground Flaxseed Powder, Flavourings, Sunflower Oil, Di-Potassium Phosphate, Thickeners (Guar Gum, Xanthan Gum), Tri-Calcium Phosphate, Vitamin & Mineral Blend (Sodium-L-Ascorbate, Ferric Pyrophosphate, Dl-Alpha Tocopheryl Acetate, Nicotinamide, Zinc Oxide, Retinyl Acetate, Calcium D-Pantothenate, Sodium Flouride, Manganese Sulphate, Cyanocobalamin, D-Biotin, Chromium Chloride, Potassium Iodide, Cholecalciferol, Pteroylmonoglutamic acid, Sodium Selenite, Copper Citrate, Pyridoxine Hydrochloride, Thiamin Hydrochloride, Phytomenadione, Riboflavin, Sodium Molybdate), Sodium Chloride, Magnesium Oxide, Sweetener (Sucralose).

What Are The Opti-Lean Meal Replacement Powder Side Effects?

We have found the following potential side effect information:

  1. Increased bowel movements
  2. Nausea
  3. Thirst
  4. Bloating
  5. Cramps
  6. Reduced appetite
  7. Fatigue
  8. Headache [1]

Note: These side effects are possible but may not be typical.

What does Opti-Lean Meal Replacement Powder claim to do?

Optimum Nutrition make the following claim about the Opti-Lean Meal Replacement Powder:

“Helps reduce bodyweight”

They state that this claim is only applicable when users are substituting two daily meals with the shakes while actively dieting.

While this statement isn’t exactly false, it’s basically saying you’ll still need to be trying to lose weight for it to work.

Are There Any Reviews From Customers?

We have found the following Opti-Lean Meal Replacement Powder Review testimonials:

Flavour Name: Vanilla Verified Purchase
Great taste, one of the nicest around. Highly Recommend

As this product is reasonably niche, there aren’t that many consumer reviews for it. While we found people stating the flavor was good, we couldn’t find much that talked about weight loss.

Where Can I Buy This Product?

This product is available from the Optimum Nutrition website as well as in store.

Our Conclusion.

To conclude our Opti-Lean Meal Replacement Powder 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. If you’re just looking for a product that’ll give you a nutritious shake that you can use as your breakfast, lunch or dinner then it’s a perfectly adequate product, albeit expensive.

Kath Ross, PhD
Kath Ross, PhD
Health Editor at DietProbe
Kathryn is a Ph.D Health Editor here at DietProbe. She specializes in diabetes and weight control research and in her spare time she's a professional cat lady and wine connoisseur!
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