Description
GYM HIGH The Stacker is a fully disclosed, high-stimulant pre-workout powder created for experienced adult users. Every active amount is listed, giving you complete visibility of the formula before it becomes part of your training routine.
One 8 g serving combines 3,200 mg beta-alanine, 2,000 mg L-tyrosine, 500 mg L-phenylalanine and 250 mg citicoline with a high-caffeine stimulant blend. It is supported by L-theanine, BioPerine®, Himalayan pink salt and vitamins C, B3 and B6.
No hidden quantities. No proprietary blend disguising the doses. Just a powerful, clearly labelled formula available in Electric Blue, Sour Green Apple and Tropical Punch.
Why choose The Stacker?
- 15 active ingredients with every amount disclosed
- 3,200 mg beta-alanine per serving
- 2,000 mg L-tyrosine per serving
- 250 mg citicoline (CDP-choline)
- 350 mg caffeine anhydrous plus guarana extract
- L-theanine and BioPerine®
- Vitamins C, B3 and B6
- 30 measured servings per container
- Three flavour options
- Manufactured in the UK for Gym High
Fully disclosed active formula
The amounts below are provided by one 8 g serving.
| Active ingredient | Amount per serving |
|---|---|
| Beta-Alanine | 3,200 mg |
| L-Tyrosine | 2,000 mg |
| L-Phenylalanine | 500 mg |
| Caffeine Anhydrous | 350 mg |
| Himalayan Pink Salt | 300 mg |
| Citicoline (CDP-Choline) | 250 mg |
| Cocoabuterol™ cocoa alkaloids | 200 mg |
| Guarana Seed Extract, standardised to 22% caffeine | 125 mg |
| Hordenine HCl | 75 mg |
| L-Theanine Extract | 50 mg |
| GBBGO™ Gamma Butyrobetaine | 50 mg |
| BioPerine® Black Pepper Fruit Extract | 5 mg |
| Vitamin C | 250 mg |
| Vitamin B3 — Niacin | 20 mg |
| Vitamin B6 | 6 mg |
Vitamins for your training routine
Vitamin C, niacin and vitamin B6 contribute to normal energy-yielding metabolism and the reduction of tiredness and fatigue. The Stacker provides all three in a convenient pre-workout powder.
How to use The Stacker
Mix one scoop (8 g) with 250–300 ml of chilled water. Shake or mix vigorously for approximately 30 seconds and consume around 30 minutes before intense exercise.
The supplied scoop is a measuring guide and may not always provide exactly 8 g. Use weighing scales when an accurate serving is required.
Do not consume more than one full serving in any 24-hour period.
High-caffeine formula
One serving contains 350 mg caffeine anhydrous and an additional caffeine source from 125 mg guarana extract standardised to 22% caffeine. This is a very high-caffeine pre-workout intended only for experienced adult users who understand their caffeine tolerance.
Account for caffeine consumed from coffee, tea, energy drinks and other supplements. Do not combine The Stacker with additional caffeinated pre-workout or stimulant products.
Flavours and servings
Each container provides approximately 30 servings and is available in:
- Electric Blue
- Sour Green Apple
- Tropical Punch
Flavouring, colouring and other ingredients may vary between flavours. Always check the packaging supplied with your selected flavour.
Frequently asked questions
How much caffeine is in The Stacker?
Each serving contains 350 mg caffeine anhydrous. The formula also includes 125 mg guarana extract standardised to 22% caffeine, so caffeine comes from more than one ingredient.
How many servings are in one container?
Each container provides approximately 30 servings when measured at 8 g per serving.
Is the complete formula disclosed?
Yes. The amount of every active ingredient is listed, allowing you to review the complete formula and assess how it fits with the rest of your supplement routine.
When should I use it?
The current directions recommend mixing one 8 g serving with 250–300 ml of chilled water and consuming it approximately 30 minutes before intense exercise. Never exceed one serving in 24 hours.
Is The Stacker suitable for beginners?
The Stacker is a very high-caffeine formula and is intended for experienced adult users. People who are new to pre-workout supplements or sensitive to caffeine should not use a full serving without first obtaining appropriate professional advice.
Important information
For adults only. Not intended for anyone under 18 years of age. Do not use during pregnancy or while breastfeeding. Do not exceed the recommended daily intake.
Consult a medical practitioner before use if you have a medical condition, experience adverse effects or take prescription medication, including blood-thinning medication. Discontinue use and seek medical advice if an adverse reaction occurs.
Allergen notice: Manufactured in a facility that handles milk, egg, soya, nuts, wheat and gluten.
Food supplements should not be used as a substitute for a varied, balanced diet and healthy lifestyle. Keep out of reach of children. Store in a cool, dry place away from direct sunlight. Do not consume the silica desiccant sachet contained inside the tub.
Every ingredient visible. Every serving measured. Add GYM HIGH The Stacker to your pre-workout routine.







Josh P. –
I’ve tried several different brands and they all usually give me the same feeling. This pre workout is still strong enough to get the job done without the huge crash at the end. Goes Well With: Dry scoop it💪