Walk into any supplement store and pick up a pre-workout. Check the label.

You'll find caffeine doses that range from 300mg to 400mg per scoop. Some clinical-edition formulas push it higher. Bang Energy drinks alone hit 300mg per can. Reign clocks in at 300mg. C4 Ultimate? 300mg. Bucked Up Woke AF? 333mg.

Then check the recommended daily caffeine intake set by the FDA: 400mg per day for healthy adults.

That's not an accident. That's a problem.

At RZN Nutrition, we built CORE5 with 200mg of natural caffeine per scoop. On purpose. Here's why.

The Hidden Problem With 300mg+ Pre-Workouts

Most lifters take pre-workout daily — sometimes twice on heavy training days. If your standard scoop already hits 300-400mg of caffeine, you're either:

1. Maxed out before noon on training days
2. Unable to safely double-up on PR days, leg days, or double sessions
3. Risking the symptoms of caffeine over-intake: jitters, sleep disruption, elevated heart rate, anxiety, and crash

The FDA recommends a daily maximum of 400mg of caffeine. Health Canada sets it at 400mg. The European Food Safety Authority sets a 200mg per-dose recommendation.

If your single scoop of pre-workout is 350mg, you've used 87% of your daily safe limit before stepping into the gym. There's no margin for coffee, an energy drink, or a second scoop.

This isn't theoretical. It's the exact problem our founder hit after six years of testing every pre-workout on the market.

Why 200mg Is the Sweet Spot

Research consistently shows that 200mg of caffeine is the minimum effective dose for measurable performance improvements in resistance training and endurance.

A 2018 meta-analysis published in the International Journal of Sport Nutrition and Exercise Metabolism found that caffeine doses between 3-6 mg/kg of body weight produce significant ergogenic effects. For a 180-pound lifter (82 kg), that's between 246mg and 492mg — meaning 200mg is right at the lower end of the effective range.

The advantage of starting at 200mg:

You can scale up on demand. On a normal training day, one scoop = 200mg of clean energy. On a PR day, leg day, or double session, you can take 1.5–2 scoops and still stay within the FDA's 400mg daily recommendation.

You stay below jitter territory. 200mg is consistently below the threshold where most people experience caffeine-induced anxiety or sleep disruption.

You can still drink coffee. A normal cup of coffee is around 95mg. With CORE5, you've got headroom for your morning cup AND your pre-workout without flirting with the daily ceiling.

You can train daily. CORE5 is built for the lifter who trains 4-6 days per week — not the lifter who only uses pre-workout once a week because it wrecks them.

The "Scale Up When You Need It" Approach

Here's the simple math:

CORE5 is designed to flex with your training, not lock you into a one-size-fits-all dose.

Compare this to a 350mg pre-workout. If you want to push harder on a PR day with a second scoop, you're now at 700mg — almost double the FDA's daily recommendation. That's not a strategy. That's a health risk.

Natural Caffeine vs. Synthetic Caffeine Anhydrous

We use natural caffeine in CORE5 — not synthetic caffeine anhydrous.

Synthetic caffeine is the cheapest form. It hits faster but spikes harder, leading to that signature 90-minute crash.

Natural caffeine (sourced from coffee bean and tea leaf extracts) releases slightly slower and is associated with a smoother energy curve. The research is still developing, but anecdotally, lifters describe natural caffeine as "cleaner" and "less jittery."

For a pre-workout designed for daily use, that smoother curve matters.

What Else Is In CORE5?

200mg caffeine is one of five ingredients in CORE5. The others are dosed at clinical levels:

• 6g L-Citrulline Malate — for pump and endurance
• 5g Creatine Monohydrate — for strength and power output
• 3.5g Beta-Alanine — for fatigue buffering
• 857mg Electrolyte Complex — for hydration during training

Every gram is on the label. No proprietary blends. No fairy-dusted doses. No artificial colors or sucralose.

When you scale up to 1.5 or 2 scoops on a hard day, you're also doubling your citrulline, creatine, and beta-alanine — giving you measurably more pump and endurance on the days when you actually need it.

This is why CORE5 was designed at 200mg of caffeine. Not as a limitation. As a feature.

The Bottom Line

If you train often, pay attention to what's actually in your supplements, and don't want to spend $50 a tub on a pre-workout that wrecks your sleep — CORE5 is built for you.

• 5 clinically dosed ingredients
• 200mg natural caffeine
• Built to take daily, scalable for big days
• No proprietary blends, no fillers, no crash

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Frequently Asked Questions

Is 200mg of caffeine enough for a pre-workout?

Yes. Research shows that 200mg is at the lower end of the clinically effective range for performance improvements. Most lifters under 200 lbs see significant ergogenic effects from a 200mg dose.

Can I take two scoops of CORE5?

On heavy training days, yes — two scoops puts you at 400mg of caffeine, which is the FDA's daily recommended maximum. Most lifters use 1-1.5 scoops daily and reserve 2 scoops for PR days or competitions.

Why don't more pre-workouts use 200mg caffeine?

Higher caffeine doses produce a stronger immediate sensation, which markets well to first-time users. But for daily lifters who train 4-6 days per week, 300-400mg per scoop creates long-term sleep, anxiety, and dependency issues.

Is natural caffeine better than synthetic caffeine?

Natural caffeine (from coffee bean and tea leaf extracts) typically produces a smoother energy curve than synthetic caffeine anhydrous. The total caffeine impact is similar, but the user experience is reported to be cleaner.

How does CORE5 compare to C4, Bucked Up, or Bang?

CORE5 has fewer ingredients (5 vs 15+), lower caffeine (200mg vs 300mg+), and no proprietary blends. It's designed for athletes who train daily and read labels.

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