Ultimate Fitness Stack
Ultimate Fitness Stack
Ultimate Fitness Stack
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.



60-day, 100% money back guarantee


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 types of creatine 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
  • 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

“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.”


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.


60-day, 100% money back guarantee

Customer Reviews
4.6 Based on 8 Reviews
5 ★
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Filter Reviews:
Jeffrey N.
India India

Great quality!

I’m 56 and I’ve been lifting for 30+ years. I’ve tried hundreds of products. Most of them don’t do **** and taste like garbage. This stack is awesome! Gives me a ton of energy, even for an old guy like myself. But the best part is it tastes really great. Don’t have to choke it down. Worth the money.

Johnny E.
India India

Hands down the best stack

Delicious. Good price. Great quality. Actually works. What more do you want? I’ll be buying all three again.

Nathan L.
India India

Down 2 pants sizes already

The tri-protein is delicious and keeps me from snacking all day long. I’ve lost 20 lbs and I’m down 2 pant sizes so far. Great stack for the price.

Terry M.
India India

Been using it for a few weeks now

This costs more than normal formulas out there but if you look at the ingredients, you can see why. I prefer to pay top dollar for high-quality ingredients that I know will work. The protein doesn’t give me gas and actually fills me up. The pre-workout gives me focused energy instead of that cracked-out energy other pre-workouts give me... and the creatine formula is super effective. I don’t feel NEARLY as sore the next day. This was a great investment.

Stephanie T.
India India

Pre-train & CRN 5 are great

The pre-train and CRN-5 are terrific. Delicious flavors and delivers awesome focus and recovery. I think the Tri-Protein is OK. Not a fan of the flavor but I’m a bit picky. I mix it up with a banana and some peanut butter and it makes it better. Best part is it doesn’t give me gas. Can’t wait for their other flavors of protein!