Ultimate Fitness Stack
Ultimate Fitness Stack
Ultimate Fitness Stack
Ultimate Fitness Stack
Ultimate Fitness Stack

“This is by far THE BEST stack I’ve used for serious energy and incredible results.”

— Jonathan T., Crazy Nutrition Customer

Crazy Nutrition’s Ultimate Fitness Stack

The Ultimate Fitness Stack by Crazy Nutrition is the best jump-start package that can help athletes of all skill levels maximize their energy, stamina, muscle build, and focus.


Ultimate Fitness Stack by Crazy Nutrition was formulated as a way to cut through the noise and confusion of the never-ending list of weight loss and bulking supplements on the market and give you only the ones that matter.

We believe these three core supplements can help any athlete, no matter their size or skill level, achieve the body & health they deserve.

Included In Crazy Nutrition’s Ultimate Fitness Stack:

  • CRN-5 is a creatine formula made with 5 grams of creatine monohydrate plus added electrolytes for muscle hydration so you can lift harder and recover faster.
  • Tri-Protein is a delicious protein formula made with 6 types of natural proteins that are absorbed in 3 different rates for longer-lasting muscle build & recovery.
  • Pre-Train is a sugar-free pre-workout formula containing 19 natural ingredients to help ignite the brain and body for intense focus, drive, and energy like never before.

Everything You Need To Maximize Performance

  • Strength Watch your reps go up
  • Weight Help support fat-burn
  • Build Increase protein
  • ATP Energy Fuels the brain & body
  • Recovery Improve muscle recovery

Works For All Athletes

  • Gym
  • Track
  • Outdoors
  • Crossfit
  • Resistance Training

Ultimate Fitness Stack by Crazy Nutrition is formulated to be taken in
conjunction with your daily workout or exercise routine.

  • STEP 1

    minutes prior to working out.

  • STEP 2

    Enjoy CRN-5 after your workout to
    help with recovery & muscle build.

  • STEP 3

    Have a delicious glass or two (or three) of Tri-Protein to help build muscle, support recovery, and suppress appetite.

“When it comes to supplementing my nutrition, I choose only the best formulas made with high-quality ingredients. Crazy Nutrition’s Ultimate Fitness Stack is by far the best, all-in-one stack out there today! It’s helped me keep my head in the game and given me that extra push to go harder. Not to mention, they taste absolutely fire.”

Nick Manning
Fitness Model

“Love how simple and easy this [Crazy Nutrition] stack is. I like how the formulas complement one another with an overall goal to get you ripped, shredded, and feeling amazing! This is a must-have for any beginner or expert athlete that wants to bring out their best.”

Men’s Physique Athlete

You’re 100% Covered By
Our Crazy 60-Day Guarantee

We’re so confident you’ll experience the results you’re looking for, we offer a no-hassle,
100% money back guarantee.

Try us for 60 days, free of risk, and if you do not see and feel a difference in your
performance, then we’ll refund your investment and won’t hold it against you.

Order Now

60-day, 100% money back guarantee

What are people saying about Crazy
Nutrition’s Ultimate Fitness Stack formula?

Customer Reviews
4.9 Based on 21 Reviews
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Filter Reviews:
Elliott D.


I am very satisfied with your products, but I will use a different brand in the future. This is because I don't want a subscription. I want to decide for myself when and what I order. Make all your products cheaper without having to take out a subscription. I'm sure you will make more sales. Good luck.

Ben A.

The only supps you need!

More stamina, better performance and great taste. I won’t shop anywhere else for my sports supplements!

Kathryn B.


Finally great tasting and results driven supplements that actually make a difference to your workout and results. Thanks Crazy Nutrition!

Sam H.

Great Supplements

I believe the supplements are working well - I definitely have more energy at the gym and recover quicker.

Justine K.

Essentials Covered

Really high quality supplements. No nasty fillers or cheap ingredients. I work as a PT so I look at ingredients, amounts and their source. These are very solid.