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  • A world-class protein blend with added caffeine
  • Includes Caffeine and Green Tea Extract for thermogenic benefits
  • Provides 20 g of protein per serving
  • Available in four fantastic flavours
  • Available in packages containing 26 servings
  • Includes added vitamins for everyday health and well-being
  • Brought to you by the world’s most popular bodybuilding supplement manufacturer
Where to Buy ON Protein Energy

Optimum Nutrition Protein Energy Overview

Optimum Nutrition Protein Energy combines Whey Protein Isolate, Whey Protein Concentrate, and Whey Protein Hydrolysate to provide a three-level protein blend for a sustained release of amino acids into your bloodstream.

Whey Protein Hydrolysate and Whey Protein Isolate are both known for being very fast-digestive and proteins, making them ideal for use post-workout or simply throughout the day to give your body a quick bolus of protein.

Whey Protein Concentrate, on the other hand, is a slightly slower-digestive and protein source that will essentially “work in the background” to keep your blood amino acid levels topped up so that you don’t feel hungry quite so soon after drinking your protein shakes.

Optimum Nutrition Protein Energy combines the benefits of this multi-period blend of proteins with the energy-boosting and thermogenic properties of Caffeine and Green Tea Extract to keep you mentally focused and energetic throughout the day.

ON Protein Energy Ingredients

Optimum Nutrition Protein Energy contains the following ingredients:

  • Protein Blend, containing:
    • Whey Protein Isolate;
    • Whey Protein Concentrate;
    • Whey Protein Hydrolysate
  • Energy and Focus Blend, containing:
    • Caffeine; and
    • Green Tea Extract
  • Cocoa Powder
  • Natural and Artificial Flavors
  • Sunflower Oil
  • Mono-and Diglycerides
  • Dipotassium Phosphate
  • Tricalcium Phosphate
  • Tocopherols
  • Corn Syrup Solids
  • Sodium Caseinate
  • Cellulose Gum
  • Xanthan Gum
  • Carrageenan
  • Lecithin
  • Sucralose
  • Acesulfame Potassium
  • Salt


How and When Do I Take It?

As per the manufacturer’s recommendations you should consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplements throughout the day as part of a healthy balanced diet and exercise program for healthy adults

Optimum Nutrition Protein Energy does contain caffeine and niacin so if you are sensitive to either of these ingredients in you will, of course, want to on the side of caution and start with a smaller serving size so that you can assess your tolerance levels and avoid any unpleasant side-effects such as jittery feelings and anxiety.


The most fundamental benefit of Optimum Nutrition Protein Energy is its three-level blend of proteins that we mentioned above.

The combination of Whey Protein Isolate, Whey Protein Concentrate, and Whey Protein Hydrolysate means that you will be reaping the benefits that all three of these slightly different proteins have to offer, helping you to keep hunger at bay for a great deal longer between meals.

If you have ever used a stand-alone Whey Protein Isolate or Whey Protein Hydrolysate supplement in you are probably well aware of how quickly they digestive and how soon after you begin to feel hungry; for many people, this occurs less than an hour after drinking their protein shakes!

Optimum Nutrition Protein Energy effectively solves this problem by combining the extremely fast-digesting proteins with a slower-digesting.

On top of this, Optimum Nutrition has added Caffeine and Green Tea Extract, both of which offer their own appetite suppressing benefits to further pronounce the overall satiating effects of this product.

Of course, we are all aware of the stimulant effects of Caffeine, and Green Tea Extract itself is a potent thermogenic compound and fat burner that should greatly help any of you who are currently trying to shed excess body fat.

Speaking of dieting, it can be very easy to become deficient in certain nutrients when you are eating in a caloric deficit, so Optimum Nutrition Protein Energy includes added Vitamin E and B Vitamins to cover your nutritional bases and help promote everyday health and well-being.

Are There Any Precautions?

Consult your doctor or physician prior to using Optimum Nutrition Protein Energy if you have any pre-existing medical conditions, are pregnant or breastfeeding, or if you are currently using prescription medication.

Optimum Nutrition Protein Energy promotes stimulatory effects and contains approximately 200 mg of caffeine per scoop so please exercise caution prior to use if you are particularly sensitive to caffeine or other stimulants.

Optimum Nutrition Protein Energy is generally not recommended for individuals under the age of 18.

Please note that these statements have been neither written nor reviewed by a doctor or medical authority of any kind.

Available Flavors and Serving Sizes

Optimum Nutrition Protein Energy is available in the following flavors:

  • Chocolate
  • Cinnamon Bun
  • Mocha Cappuccino
  • Vanilla Latte

Optimum Nutrition Protein Energy is available in packages containing 26 servings.

Good Value for Money?

Optimum Nutrition Protein Energy is probably best looked at as a luxury item because it is certainly not designed for those of you who are currently operating on a tight budget; this includes complete beginners who want a simple protein powder that won’t break the bank.

Whenever you purchase and Optimum Nutrition product you can almost always guarantee that you will be receiving some of the best quality ingredients that the supplement industry has to offer, but context is always important when making a decision on a product like this.

It probably won’t taste as good but you could save money by buying a cheaper chocolate-flavored protein powder such as Optimum Nutrition Gold Standard Whey and adding a couple of spoonfuls of instant coffee to the mix – there’s your caffeine fix right there!

Final Thoughts

Optimum Nutrition Protein Energy is a relatively unique product and one that should satisfy any of you who are looking to get slightly more from your existing protein powder.

Optimum Nutrition Protein Energy offers the exact same degree of quality that most of us have come to expect from Optimum Nutrition supplements, and Optimum Nutrition has definitely outdone itself in the taste department.

Available in four awesome flavors based on coffee shop and café favorites, and provided with added stimulants, thermogenic, and vitamins, Optimum Nutrition Protein Energy is a fantastic luxury whey protein blend supplement that definitely delivers on its promises.

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