Core⁵ Pre-Workout
Pre-workout, stripped to what works. 5 core ingredients, all clinically dosed and named on the label. 5g Creatine, 6g L-Citrulline Malate, 3.5g Beta-Alanine, 857mg Electrolyte Complex, 200mg Caffeine. No artificial colors, flavors, fillers, or sugar.
Core⁵ Pre-Workout
- 5g creatine to support strength and power output by helping regenerate ATP during high-intensity training.
- 6g l-citrulline malate 2:1 to promote blood flow and pump by increasing nitric oxide availability and supporting sustained performance.
- 3.5g beta-alanine to buffer lactic acid buildup and improve endurance, helping maintain higher training intensity.
- 857mg electrolyte complex provides magnesium, chloride, sodium, and potassium to support hydration, fluid balance, and muscle function.
- 200mg natural caffeine to deliver clean, steady workout energy and improved focus without unnecessary stimulant blends.
Other Ingredients: Silicon Dioxide (anti-caking), Natural Flavors, Stevia Leaf Extract (SureSweet-SL™), Beet Root Powder (for color), Calcium Silicate (anti-caking)
Mix 1 scoop with 8-12 oz of water and consume 20 - 30 minutes before training. New users: begin with ½ scoop to assess tolerance. Do not exceed 2 scoops per day. Use daily for best results.
Orders are processed within 1–2 business days (Monday–Friday). During high-demand periods, processing may take slightly longer. Shipping options and delivery estimates are shown at checkout. Because our products are consumable supplements, we accept returns within 30 days of delivery on unopened, untampered items only. Opened or used products are not eligible for return.
If your order arrives damaged or defective, contact us within 7 days of delivery with photos and your order number—we’ll make it right.
Original shipping costs are non-refundable. Return shipping fees may be deducted from your refund if a prepaid label is provided.
Questions? Reach us anytime at support@rznnutrition.com.
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Strength
Pump
Endurance
Hydration
Energy
The Breakdown
Strength
Creatine Monohydrate
5g
More strength.
Helps your muscles produce power so you can train harder, lift heavier, and build long-term progress.
Pump
Citrulline Malate 2:1
6g
Better pumps.
Supports blood flow so your muscles feel fuller and your working sets feel better.
Endurance
Beta-Alanine
3.5g
More reps.
Helps you keep pushing when your muscles start to burn during hard sets.
Hydration
Electrolyte Complex
857mg
Better hydration.
Supports hydration and muscle function while you train, sweat, and push hard. Includes potassium 200mg, magnesium 60mg, sodium 240mg, and chloride 357mg.
Energy
Natural Caffeine
200mg
Clean energy.
Gives you energy and focus without turning your pre-workout into a stim bomb.
Why Choose Core⁵
// A true all-in-one pre-workout.
Creatine, electrolytes, and a full pump and endurance stack in one scoop. No buying three products to cover one workout. Everything you need is already in here.
// 5 ingredients beats 20 every time.
More ingredients doesn't mean more results. Core⁵ strips pre-workout to the 5 core ingredients backed by the most research — each at a full clinical dose.
// Scalable to your training.
At 200mg of caffeine, one scoop is dialed in for daily training. Going for a PR? Take up to two scoops for extra strength, pump, and endurance without an overload of stimulants. You control the intensity.
The Comparison
Other Pre-Workouts vs CORE⁵
More ingredients doesn’t make a better pre-workout. CORE⁵ keeps it to the five that actually matter before training.
| What matters | Other Pre-Workouts | CORE⁵ |
|---|---|---|
| Clinical dosing | ✕Often underdosed | ✓Clinically dosed core ingredients |
| Creatine included | ✕Often sold separately | ✓Built in, 5g |
| Electrolytes for hydration | ✕Rarely a formula focus | ✓857mg electrolytes for hydration |
| Caffeine | ✕Often 300mg+ or stim-heavy | ✓200mg clean energy |
| Ingredient count | ✕Often 15 to 20+ ingredients | ✓5 core ingredients |
| Clean formula | ✕Often artificial colors, flavors, or sweeteners | ✓No artificial colors, flavors, or sweeteners |
| Built for daily use | ✕Often built for max-stim sessions | ✓Built for consistent training |
Comparison reflects common pre-workout category trends. Individual formulas vary. Always review each product label before purchase.
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It started in college. Every pre-workout I tried was either 20+ ingredients and overloaded with caffeine, or "clean" but too underdosed to do anything. None of it hit right.
So I did the research myself. I found the ingredients that actually matter in the gym and picked one for each thing that counts. Creatine for strength. Citrulline for pump. Beta-alanine for endurance. Electrolytes for hydration. Caffeine for energy.
I ordered raw powder by the kilo and measured out single servings on my kitchen counter, dialing it in workout after workout until it was right. Five core ingredients, and it hit harder than any store-bought pre I'd ever used.
CORE⁵ is that formula.
— Andrew
Founder, RZN Nutrition
Frequently asked
questions
questions
What does pre-workout do?
Pre-workout supplements are designed to support energy, focus, endurance, and performance during training. Core⁵ uses clinically effective dosages of five core ingredients to deliver these benefits without unnecessary additives.
When should I take pre-workout?
Most people take pre-workout 20–30 minutes before training. This gives the ingredients time to absorb and deliver steady, functional energy.
What makes Core⁵ different from other pre-workouts?
Core⁵ uses ingredients at clinically effective dosages, with no artificial colors, flavors, fillers, or sugar. Designed for clean, steady performance for your workouts.
Will Core⁵ give me jitters or a crash?
Core⁵ is formulated for smooth, controlled energy using clean ingredients and moderate caffeine, avoiding the overstimulated spike-and-crash effect of typical pre-workouts.
Is Core⁵ safe for daily use?
Yes. Core⁵ uses a simple, intentional formula without harsh stimulants, making it suitable for consistent, daily training.
How should I take Core⁵ for best results?
Mix one scoop with 8–12 oz of water and drink 20–30 minutes before training. New users can start with a half scoop to assess tolerance. Use daily for best results.
Does Core⁵ use clinically effective dosages?
Yes. Each ingredient is included at clinically effective or clinically supported dosages to ensure real performance benefits.
Can beginners use Core⁵?
Yes. Core⁵’s simple, clean formula works well for both beginners and experienced athletes. Beginners may start with a half scoop.
What results should I expect from Core⁵?
Core⁵ supports steady energy, focus, endurance, and more consistent performance without the typical crash.
How is Core⁵ made and tested?
Core⁵ is manufactured in a GMP-certified facility and independently tested by a third-party to verify quality, purity, and consistency.
