Free delivery on orders over £60 | Subscribe & Save 30%
EXCLUSIVE OFFER: Upgrade to The Ultimate Fitness Stack and Save 30%

“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.


“Best for CrossFit”


“Our Favourite Protein Powders”

Runner’s World

“Protein Power”

Women’s Fitness

As seen in

  • Tom's Guide
  • Marie Claire
  • iNews
  • Daily Express
  • Stylist
  • Hip & Healthy
  • Women’s Health

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
  • 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

What are people saying about Crazy