CrossFit Supplement Stack for Elite Athletes

Build your performance engine with expertly curated supplement stacks for CrossFit. Stack pre-workout, creatine, and recovery for optimal results. The CrossFit Stack: Pre-Workout + Creatine + Protein. Try the best CrossFit protein for £59.99. 

CrossFit Supplements - CrossFit Supplements For Women

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12 products

EFECTIV® Whey Protein Powder | 60 Servings | Muscle Growth & Recovery
BESTSELLER

Whey Protein Powder | 60 Servings

Muscle Growth & Recovery

✓ High Protein
✓ Low Sugar
£59.99
EFECTIV® Creatine Monohydrate | 60 Servings | Strength & Performance
BESTSELLER

Creatine Monohydrate | 60 Servings

Strength & Performance

✓ 5g Creatine Monohydrate
✓ 3rd Party Tested
£14.99
EFECTIV® Vegan Protein Powder | 30 Servings | 100% Plant-Based
BESTSELLER

Vegan Protein Powder | 30 Servings

100% Plant-Based

✓ 23g Protein
✓ 0.1g Sugar
£21.99
EFECTIV® Hybrid Creatine + Hydration | 30 Servings | Strength & Endurance
BESTSELLER

Hybrid Creatine + Hydration | 30 Servings

Strength & Endurance

✓ 5g Creatine
✓ Electrolytes
£19.99
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EFECTIV® Project PUMP Pre-Workout | 40 Servings | Muscle Pump

Project PUMP Pre-Workout | 40 Servings

Muscle Pump

✓ Stimulant Free | Extreme Pump
✓ 190 kcal per bottle
£34.99
EFECTIV® Protein Shaker Bottle | 600ml

Protein Shaker Bottle

600ml

✓ Leak Proof
✓ Easy Mixing
£4.99
Package of Efectiv Grass Fed Whey Protein Isolate in Milky Chocolate flavor on a white background
NEW

Grass Fed Whey Protein Isolate | 66 Servings

Muscle Growth

✓ 27g Protein
✓ 0.4g Sugar
£64.99
EFECTIV® LEGACY Pre-Workout | 40 Servings | Energy, Focus & Performance

LEGACY Pre-Workout | 40 Servings

Energy, Focus & Performance

✓ Heavily Dosed Formula
✓ High Stimulant
£34.99
EFECTIV® Clear Whey Protein Isolate | 20 Servings | Muscle Recovery

Clear Whey Protein Isolate | 20 Servings

Muscle Recovery

✓ 24g Protein
✓ 0.2g Sugar
£29.99
EFECTIV® EAA Essential Amino Acids | 30 Servings | Muscle Recovery
NEW

EAA Essential Amino Acids | 30 Servings

Muscle Recovery

✓ 8g EAAs
✓ 6g BCAAs
£14.99£19.99
EFECTIV® Essentials Starter Pack | Whey Protein | Creatine | Shaker Bottle
SALE

Essentials Starter Pack | Whey Protein

Creatine | Shaker Bottle

✓ 23g Protein
✓ 5g Creatine
£59.99£78.97
Efectiv Whey:
Creatine Monohydrate (Unflavoured):
Shaker Bottle 600ml:
Black container of 'the Sauce' pre-workout supplement with visible branding on a white background
NEW

The Sauce | CrossFit Pre-Workout

20 Servings

✓ 15g Carbohydrates
✓ 400mg Sodium
£29.99

Frequently Asked Questions

What supplements do elite CrossFit athletes use?

Elite CrossFit athletes typically use a combination of pre-workouts, creatine, intra workout support, electrolytes, and protein to maintain performance and recovery.

What is the best supplement stack for CrossFit performance?

A strong CrossFit stack includes pre-workout for energy, intra workout support for endurance and hydration, and protein for recovery.

How do I improve performance in CrossFit competitions?

Improving performance requires consistent training, proper nutrition, hydration, and supplementation to support output and recovery.

CrossFit Supplement Stack for Elite Athletes

At an elite level, performance comes down to marginal gains. The right supplement stack supports output, recovery, and consistency across high-volume training.

This collection is built for competitive CrossFit athletes who need reliable energy, endurance, and recovery without compromise.

What Matters for Elite Performance

Complete Your Stack

The Efectiv Promise

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Rated 4.9/5 by 8,000+ Athletes

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We know you need your fuel fast. Order before 4pm for same-day dispatch. Free UK delivery over £50.

30-Day Money Back

Train with confidence. If you don't feel the difference, return the unused portion for a full refund.

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Every batch is third-party tested (ISO 17025) for banned substances and label accuracy.