The Fusion Starter

The Fusion Starter is unlike anything you've ever tried before. 

The Fusion Starter includes:

Ready to perform at your peak? Build Muscle? Train like an olympian? Good. This is what you've been looking for.

Mr Fusion

What is Mr. Fusion?


Mr Fusion is the ultimate coalescence of pump and energy.

  • Unrivaled Pumps and Blood Flow
  • Sustained Clean Energy & Focus*
  • Power and Strength Intensifier*

Mr. Fusion provides an incredibly clean energy while maximizing pump and endurance. You'll be more focused, energized, and perform better through your workout. The amount of caffeine and stimulants is much more mild than other pre-workouts, so you shouldn't feel a 'jittery' or anxious.

  • Improved Blood Flow 
  • Increased Nitric Oxide Production
  • Improved Blood flow the muscle
  • Decreased Muscular fatigue
  • Increased endurance and muscular performance 
  • Steady No- Crash Performance 
Who is it for?

Anyone needing to improve energy and performance from their workout but doesn't want something that makes them feel jittery. This is an ideal product when looking to maximize muscular performance, increase strength, and endurance.

What will I notice?

If you've taken pre-workout before, you will notice a bit of the tingling feeling caused from beta alanine. This is normal and likely the first thing you'll notice. You will also notice increased energy and alertness before much else.

During your workout you'll notice an increased pump (blood flow) in the muscle you're training. Set after set you'll notice you can keep pushing further than you would normally and aren't fatiguing as quickly. You'll be able to workout harder and longer than normal with less overall fatigue.


What is Isothority?

Isothority is a cross-flow cold-microfiltered whey protein isolate. Sounds fancy, right? Let's break it down: Isolate is the purest form of Whey Protein available. You get less filler, carbs, lactose, etc. This means it also digests much more easily without stomach issues.

The method by which the protein is extracted is much more precise. Rather than using extreme heat, acid washes, and other harmful processes, we utilize a filtration system to isolate the protein.

This leaves an incredibly clean protein that is easy to flavor, has a great texture, and digests extremely well. There truly is not another protein that is this pure, and tastes this good.

Who is it for?

Everyone. If you are exercising, restricting your calories, or cleaning up your diet - you'll benefit from Isothority. Isothority is especially important after your workout as it will help you recover faster, be less sore, and boost your metabolism.

How do I use it?

The most important time is after your workout - 1 scoop mixed with 6oz of water (or milk) will do it for most everyone. It can also be utilized at any other time you would need a protein source; as part of a meal, as a milk shake, or just to increase total protein intake for the day.

What will I notice?

This is a tricky question. Here's another way to look at it: What would you notice from eating a chicken breast, or egg whites? In general, you will be less sore after your workouts. Your body will adapt and gain strength and endurance much more easily. You'll also boost your metabolism and stave off hunger more easily when taking a quality protein source in.

Amino Factor

What is Amino Factor?

Amino Factor is a simple product. It only contains three ingredients:

  • L-Leucine
  • L-Isoleucine
  • L-Valine

Those three amino acids make up the Branched-Chain Amino Acids or BCAA's. 

Basically, these are the most important amino acids you could take in to help protect and rebuild muscle tissue around workouts.

Amino Factor is a 2:1:1 Instantized BCAA product. That specific ratio is one that has been clinically proven to increase muscle protein synthesis, speed up recovery, reduce DOMS (delayed onset muscle soreness), and reduce muscle catabolism (waste). 


Customer Reviews

Based on 66 reviews

Not only is this product great tasting but it provided me with energy to make it through my workout without the jitters!

Thank you Tiffany!!


Nutrithority always has quality products, quality taste, quality ingredients. I don’t even try other brands anymore. I know what I’m getting from the yellow label and I like it!

Thank you Bryce!!

Love it!

This is my first time using pre-workout and I can't believe I've gone without it for so long! I have already recommended Mr. Fusion to a friend who purchased as well! Pineapple punch has a really great flavor and I look forward to trying more. My order contained so many free samples and a hand written note!!

Thank you so much Teryn!!

Best preworkout ever

I have tried LOTS of pre workouts over the last 9 years. This one takes the cake! I was recommended this a year or so ago and keep coming back to it!

Thank you!

The perfect pre-workout

Caffeine goes a long way with me, Mr Fusion is the perfect amount of everything to make me feel awesome during my workouts! Not to much caffeine but not to little. The perfect mix!

Thank you Miranda! Glad you like it!

Yummy Orange Cola

The best by far pre workout out there. The powder mixes well and does not clump up. I sometimes drink it on my off days for added energy boost if I feel sluggish. Definitely helps with helping hit my PRs. I sometimes forget I drank it because it does not give me that itchy jittery feeling you get with other powders.

Thank you Victoria!!

Good I feel more energized

Good I feel more energized

Thanks Tyler!!

Phenomenal product

This is one of my top favorite pre workouts! Gets the job done

Thank you Ashley!!

Great products. Quick delivery!

Great products. Quick delivery!

Thank you Brandon!!

My favorite pre-workout

My favorite pre-workout

Thank you Olivia!!

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